[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"item-3620":3,"related-3620":116},{"id":4,"title":5,"url":6,"summary":7,"summary_zh":8,"content":9,"source_name":10,"source_url":6,"published_at":11,"category":12,"cover_url":9,"hotness":13,"is_selected":14,"score":15,"score_detail":16,"sources":24,"tags":26,"primary_topic":32,"secondary_topics":37,"classification":38,"search_phrases":78,"slug":81,"view_count":68,"doi":82,"paper":83,"created_at":115},3620,"Assessment of corn chlorophyll content via UAV‐derived vegetative indices across growth stages","https:\u002F\u002Fdoi.org\u002F10.1002\u002Fagg2.70437","Abstract Traditional chlorophyll (Chl) assessment methods are labor‐intensive and spatially limited. This study evaluated unmanned aerial vehicle (UAV) multispectral imagery for nondestructive field‐scale canopy Chl estimation in corn ( Zea mays L.) to support precision nutrient management. Field experiments were conducted at two Virginia Tech research farms under two nitrogen (N) rates, 112 and 224 kg N ha − 1 , and five phosphorus (P) rates, 0, 56, 112, 168, and 224 kg P 2 O 5 ha − 1 . Canopy Chl was measured using a SPAD‐502 Plus chlorophyll meter (where SPAD is soil plant analysis development). UAV imagery was collected at three sampling times using a DJI Mavic 3 M: early vegetative (Ve‐E), late vegetative (Ve‐L), and reproductive stages, corresponding to V4–V6, V11–V13, and R3–R5 growth stages, respectively. Eight vegetation indices (VIs) were derived from green, red, red‐edge, and near‐infrared bands. Relationships between SPAD and spectral predictors were evaluated using Pearson correlation, simple and multiple linear regression, Lasso, and Elastic Net. Model performance was assessed using fivefold cross‐validated (CV) estimates repeated 30 times with CV R 2 , root mean square error, and relative RMSE. Predictive accuracy was moderate and varied by site and time, with strongest relationships during Ve‐L. At Ve‐L, Green Normalized Difference Vegetation Index (GNDVI) and Chlorophyll Index Red Edge were the best predictors at Orange and Kentland, respectively. Multivariate and regularized models performed comparably but did not improve accuracy over the best single‐VI models. Overall, GNDVI and red‐edge‐based indices were the most useful indicators of canopy Chl variation. These findings indicate that UAV‐derived GNDVI and red‐edge indices can provide moderately accurate and interpretable estimates of SPAD‐based Chl status.","传统叶绿素（Chl）评估方法费时费力且空间覆盖有限。本研究评估了无人机（UAV）多光谱影像在玉米（Zea mays L.）田块尺度冠层叶绿素无损估测中的应用，以支持精准养分管理。田间试验在弗吉尼亚理工大学的两个研究农场进行，设置两个氮（N）水平，分别为112和224 kg N ha⁻¹，以及五个磷（P）水平，分别为0、56、112、168和224 kg P₂O₅ ha⁻¹。使用SPAD-502 Plus叶绿素仪（SPAD即土壤植物分析开发）测定冠层叶绿素。使用DJI Mavic 3 M在三个采样时期采集无人机影像：营养生长早期（Ve-E）、营养生长晚期（Ve-L）和生殖生长阶段，分别对应V4–V6、V11–V13和R3–R5生育时期。从绿、红、红边和近红外波段提取了8种植被指数（VIs）。采用Pearson相关、简单和多元线性回归、Lasso及弹性网（Elastic Net）评估SPAD与光谱预测变量之间的关系。模型性能通过重复30次的五折交叉验证（CV）估计进行评估，指标包括交叉验证R²、均方根误差和相对均方根误差。预测精度为中等水平，且因地点和时间而异，其中Ve-L时期关系最强。在Ve-L时期，绿归一化差异植被指数（GNDVI）和红边叶绿素指数分别在Orange和Kentland表现最佳。多变量模型和正则化模型表现相当，但未能比最佳单植被指数模型提高精度。总体而言，GNDVI和基于红边的指数是冠层叶绿素变异最有用的指标。这些结果表明，无人机获取的GNDVI和红边指数能够对基于SPAD的叶绿素状况提供中等精度且可解释的估测。",null,"Agrosystems Geosciences & Environment","2026-09-24T00:00:00Z","论文",10,false,69,{"impact":17,"substance":18,"depth":19,"authority":20,"freshness":21,"relevant":22,"comment":23},12,20,16,13,8,1,"基于无人机多光谱影像评估玉米冠层叶绿素，方法规范、结论明确，对精准养分管理有参考价值，但属细分领域研究，公共影响有限。",[25],{"name":10,"url":6},[27,28,29,30,31],"智慧农业","玉米","遥感","氮肥管理","植被指数",{"code":33,"slug":34,"name":28,"path":35,"parent_code":36},"A3","maize","\u002Ftopic\u002Ffield-crops\u002Fmaize","A",[],{"status":39,"locked":14,"version":40,"method":41,"evidence":42},"classified","2026-10-22.2","rules",{"candidates":43,"agricultural_evidence":46},[44,51,59,66,73],{"code":33,"score":45,"supported":46,"title":47,"abstract":49,"tags":50},15,true,[48],"corn",[28,48],[28],{"code":52,"score":53,"supported":46,"title":54,"abstract":55,"tags":58},"H2",6,[],[56,57],"土壤","soil",[],{"code":60,"score":61,"supported":46,"title":62,"abstract":63,"tags":65},"I3",5,[],[64],"multispectral",[31,29],{"code":67,"score":68,"supported":46,"title":69,"abstract":70,"tags":72},"F3",4,[],[71],"养分管理",[30],{"code":74,"score":22,"supported":14,"title":75,"abstract":76,"tags":77},"I1",[],[],[27],[79,80],"无人机 玉米 叶绿素 遥感","Virginia Tech 玉米 氮肥 SPAD","无人机玉米叶绿素遥感-3620","10.1002\u002Fagg2.70437",{"doi":82,"openalex_id":84,"authors":85,"venue":10,"cited_by_count":106,"oa_url":107,"card":108,"direction":112,"ingested_from":114},"W7214232972",[86,89,92,95,97,99,101,103],{"name":87,"orcid":88},"Aarati Khulal","https:\u002F\u002Forcid.org\u002F0000-0003-4405-1320",{"name":90,"orcid":91},"Huijie Gan","https:\u002F\u002Forcid.org\u002F0000-0001-6634-5704",{"name":93,"orcid":94},"Jitender Rathore","https:\u002F\u002Forcid.org\u002F0009-0006-5764-1652",{"name":96,"orcid":9},"Sheetal Kumari",{"name":98,"orcid":9},"Ivy Flory",{"name":100,"orcid":9},"Caleb Bishop",{"name":102,"orcid":9},"Santosh Rijal",{"name":104,"orcid":105},"Olga S. Walsh","https:\u002F\u002Forcid.org\u002F0000-0002-2958-931X",0,"https:\u002F\u002Fonlinelibrary.wiley.com\u002Fdoi\u002Fpdfdirect\u002F10.1002\u002Fagg2.70437",{"tldr":109,"method":110,"finding":111,"direction":112,"opportunity":113},"用无人机多光谱植被指数评估玉米不同生育期冠层叶绿素含量。","DJI Mavic 3 M多光谱影像，8个植被指数，SPAD实测，线性回归与La","GNDVI与红边指数在营养生长后期预测SPAD最准，多变量模型未优于单指数。","农业遥感与作物表型","可探索多生育期时序融合与多源数据耦合，提升跨站点跨年份叶绿素估算泛化能力。","openalex","2026-09-27T23:30:35.468236Z",{"total":53,"page":22,"page_size":53,"items":117},[118,177,256,343,407,481],{"id":119,"title":120,"url":121,"summary":122,"summary_zh":9,"content":9,"source_name":123,"source_url":9,"published_at":9,"category":12,"cover_url":9,"hotness":13,"is_selected":14,"score":124,"score_detail":125,"sources":130,"tags":132,"primary_topic":136,"secondary_topics":137,"classification":138,"search_phrases":162,"slug":165,"view_count":166,"doi":9,"paper":167,"created_at":176},4477,"玉米生产精准农业系统综述：技术、应用与产量优化（2020—2026）","https:\u002F\u002Fm2.mtmt.hu\u002Fapi\u002Fpublication\u002F37500368","依据PRISMA 2020指南，系统检索Scopus与Web of Science共464篇文献，最终纳入129项研究；样本构成为田间试验（28.6%）、遥感与精准农业整合研究（25.5%）、机器学习应用（19.4%）、气候知情精准农业策略（23.4%）和土壤退化研究（3.1%）；研究表明精准农业技术通过定点管理和数据驱动决策支持，提升了玉米生产力、养分利用效率、水利用效率和产量预测准确性；指出采用精准农业仍受制于实施成本高、技术复杂、数据有限等因素。","Precision Agriculture in Maize Production Systematic Review 2026",74,{"impact":126,"substance":127,"depth":126,"authority":20,"freshness":128,"relevant":22,"comment":129},18,22,3,"基于PRISMA 2020的系统综述，纳入129项研究，数据规模与方法规范性强，对玉米精准农业技术路径与瓶颈有实质参考价值，但发布日期不明、时效性偏弱。",[131],{"name":123,"url":121},[27,133,134,28,135,29],"产量预测","机器学习","精准农业",{"code":33,"slug":34,"name":28,"path":35,"parent_code":36},[],{"status":39,"locked":14,"version":40,"method":41,"evidence":139},{"candidates":140,"agricultural_evidence":46},[141,145,149,153,158],{"code":74,"score":20,"supported":46,"title":142,"abstract":143,"tags":144},[135],[135],[27,135],{"code":33,"score":17,"supported":46,"title":146,"abstract":147,"tags":148},[28],[28],[28],{"code":60,"score":61,"supported":46,"title":150,"abstract":151,"tags":152},[],[29],[133,29],{"code":154,"score":68,"supported":46,"title":155,"abstract":156,"tags":157},"I2",[],[134],[134],{"code":52,"score":128,"supported":46,"title":159,"abstract":160,"tags":161},[],[56],[],[163,164],"玉米 精准农业 系统综述","玉米 遥感 机器学习 产量","玉米精准农业系统综述-4477",2,{"doi":9,"openalex_id":9,"authors":168,"venue":9,"cited_by_count":106,"oa_url":9,"card":169,"direction":173,"ingested_from":175},[],{"tldr":170,"method":171,"finding":172,"direction":173,"opportunity":174},"系统综述2020—2026年玉米精准农业技术、应用与产量优化研究。","按PRISMA 2020检索Scopus与WoS，纳入129项研究做分类分析。","精准农业通过定点管理与数据决策提升玉米产量、养分和水利用效率。","智慧农业 \u002F 农业物联网","成本高、技术复杂与数据不足制约推广，低成本轻量化方案与本地化数据共享是研究空白。","agent","2026-10-09T00:05:02.451957Z",{"id":178,"title":179,"url":180,"summary":181,"summary_zh":182,"content":9,"source_name":183,"source_url":180,"published_at":184,"category":12,"cover_url":9,"hotness":13,"is_selected":14,"score":185,"score_detail":186,"sources":190,"tags":192,"primary_topic":195,"secondary_topics":196,"classification":202,"search_phrases":222,"slug":225,"view_count":166,"doi":226,"paper":227,"created_at":255},3973,"A physical-context-conditioned multimodal fusion network for estimating maize canopy nitrogen content using multi-source UAV remote sensing data","https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.compag.2026.112465","A physical-context-conditioned multimodal fusion network for estimating maize canopy nitrogen content using multi-source UAV remote sensing data。Computers and Electronics in Agriculture","一种基于物理情境条件调节的多模态融合网络，用于利用多源无人机遥感数据估算玉米冠层氮含量。《计算机与电子农业》","Computers and Electronics in Agriculture","2026-10-01T00:00:00Z",81,{"impact":126,"substance":127,"depth":126,"authority":187,"freshness":188,"relevant":22,"comment":189},14,9,"多源无人机遥感与物理上下文多模态融合估算玉米冠层氮素，方法新颖、数据可靠，对精准施肥有参考价值。",[191],{"name":183,"url":180},[27,193,28,29,194],"农业人工智能","氮素营养",{"code":33,"slug":34,"name":28,"path":35,"parent_code":36},[197],{"code":60,"slug":198,"name":199,"path":200,"parent_code":201},"remote-sensing","遥感与农情监测","\u002Ftopic\u002Fdigital-agriculture\u002Fremote-sensing","I",{"status":39,"locked":14,"version":40,"method":41,"evidence":203},{"candidates":204,"agricultural_evidence":46},[205,209,214,218],{"code":33,"score":45,"supported":46,"title":206,"abstract":207,"tags":208},[34],[28,34],[28],{"code":60,"score":45,"supported":46,"title":210,"abstract":212,"tags":213},[211],"remote sensing",[29,211],[29],{"code":74,"score":22,"supported":14,"title":215,"abstract":216,"tags":217},[],[],[27],{"code":154,"score":22,"supported":14,"title":219,"abstract":220,"tags":221},[],[],[193],[223,224],"无人机 遥感 玉米 氮含量","多模态融合 冠层氮素","无人机遥感玉米氮含量-3973","10.1016\u002Fj.compag.2026.112465",{"doi":226,"openalex_id":228,"authors":229,"venue":183,"cited_by_count":106,"oa_url":9,"card":250,"direction":112,"ingested_from":114},"W7215084428",[230,232,234,237,240,242,244,247],{"name":231,"orcid":9},"Wang Baoju",{"name":233,"orcid":9},"Jing Zhao",{"name":235,"orcid":236},"Yu Yan","https:\u002F\u002Forcid.org\u002F0009-0004-4202-6935",{"name":238,"orcid":239},"Junke Zhu","https:\u002F\u002Forcid.org\u002F0009-0005-7778-9614",{"name":241,"orcid":9},"Xinlong Li",{"name":243,"orcid":9},"Huizheng Wang",{"name":245,"orcid":246},"Weiguang Yang","https:\u002F\u002Forcid.org\u002F0000-0002-9862-5839",{"name":248,"orcid":249},"Yubin Lan","https:\u002F\u002Forcid.org\u002F0000-0001-6664-5571",{"tldr":251,"method":252,"finding":253,"direction":112,"opportunity":254},"提出物理上下文条件化多模态融合网络，用多源无人机遥感估算玉米冠层氮含量。","多源无人机遥感数据与物理上下文条件化多模态融合网络。","该网络能提升玉米冠层氮含量估算精度，融合多源数据优于单一模态。","可探索物理先验与多模态融合在不同作物、生育期及跨区域迁移中的泛化能力。","2026-10-02T23:30:02.413294Z",{"id":257,"title":258,"url":259,"summary":260,"summary_zh":261,"content":9,"source_name":262,"source_url":259,"published_at":263,"category":12,"cover_url":9,"hotness":13,"is_selected":46,"score":185,"score_detail":264,"sources":266,"tags":268,"primary_topic":270,"secondary_topics":271,"classification":276,"search_phrases":305,"slug":308,"view_count":61,"doi":309,"paper":310,"created_at":342},3842,"Raspberry Pi Lightweight Deep Learning Models Deployed for Corn Growth Stage Classification Using PhenoCam Images","https:\u002F\u002Fdoi.org\u002F10.3390\u002Frs18193337","Identifying crop growth stages is essential for comprehensive assessment that facilitates timely and precise agronomic management. However, conventional field-based manual scouting is labor-intensive, time-consuming, and lacks scalability. Digital field images with advanced models deployed on portable edge-computing devices offer an alternative solution for real-time crop monitoring and decision support. Therefore, in this study, the standard 8 corn growth stages were defined as 8 classes based on distinct visual canopy appearance patterns observed in PhenoCam (near-surface [proximal] remote sensing network camera) imagery collected from 10 PhenoCam sites. These classes do not correspond directly to standard agronomic vegetation and reproductive growth stages. For modeling, four lightweight deep learning (DL) models, ELiteCrop0, ELiteCrop1, ELiteCrop4, and MobNetCropV2, were developed and evaluated across five image vertical clipping levels (0–40%) using a supercomputer (NDSU CCAST). The optimized model was subsequently deployed on a single-board Raspberry Pi 5 computer for edge inference. Model training accounted for the majority of the total CPU time, exceeding 97%, while the testing times ranged from 0.01–0.12 min, enabling real-time applications. Among the models, ELiteCrop0 achieved the most balanced performance with a confusion-matrix diagonal ratio (CMDR) of 0.93, followed by ELiteCrop1 (CMDR = 0.92). Overall, model performance decreased with increasing vertical clipping; therefore, a moderate image clipping (0–10%) was recommended for improved computational efficiency. Analysis with a supercomputer produced an intrasite (same training sites) accuracy of 0.90–0.93 (Raspberry Pi: 0.78–0.81) and an intersite (unseen test sites) accuracy of 0.48–0.50 (Raspberry Pi: 0.41–0.43), indicating challenges with model generalization. Raspberry Pi processed ≈ 1000 images\u002Fmin at 68 °C, with a PhenoCam:Raspberry Pi processing ratio of 1:2500 at 50% capacity over an 8 h day. Overall, this study presents a scalable and cost-effective solution for real-time corn growth stage monitoring in precision agriculture, which could be extended to other crops.","识别作物生长阶段对于全面评估、促进及时精准的农艺管理至关重要。然而，传统的田间人工巡查劳动强度大、耗时且缺乏可扩展性。部署在便携式边缘计算设备上的数字田间图像与先进模型为实时作物监测和决策支持提供了替代方案。因此，本研究基于从10个PhenoCam（近地面[近端]遥感网络相机）站点采集的影像中观察到的不同冠层视觉外观模式，将标准的8个玉米生长阶段定义为8个类别。这些类别并不直接对应于标准的农艺营养生长和生殖生长阶段。在建模方面，开发了四种轻量级深度学习（DL）模型——ELiteCrop0、ELiteCrop1、ELiteCrop4和MobNetCropV2，并利用超级计算机（NDSU CCAST）在五种图像垂直裁剪水平（0–40%）下进行了评估。随后，优化后的模型被部署到单板Raspberry Pi 5计算机上进行边缘推理。模型训练占总CPU时间的大部分，超过97%，而测试时间为0.01–0.12分钟，支持实时应用。在各模型中，ELiteCrop0实现了最均衡的性能，混淆矩阵对角线比率（CMDR）为0.93，其次是ELiteCrop1（CMDR = 0.92）。总体而言，模型性能随垂直裁剪比例的增加而下降；因此，建议采用适度的图像裁剪（0–10%）以提高计算效率。使用超级计算机的分析得出站内（相同训练站点）准确率为0.90–0.93（Raspberry Pi：0.78–0.81），站间（未见测试站点）准确率为0.48–0.50（Raspberry Pi：0.41–0.43），表明模型泛化面临挑战。Raspberry Pi在68 °C下处理约1000张图像\u002F分钟，在8小时工作日50%容量下，PhenoCam与Raspberry Pi的处理比为1:2500。总体而言，本研究为精准农业中的实时玉米生长阶段监测提供了一种可扩展且经济高效的解决方案，并可扩展至其他作物。","Remote Sensing","2026-09-29T00:00:00Z",{"impact":126,"substance":127,"depth":126,"authority":187,"freshness":188,"relevant":22,"comment":265},"该研究将轻量深度学习模型部署于树莓派实现玉米生育期实时识别，方法新颖、数据扎实，对精准农业边缘监测有参考价值。",[267],{"name":262,"url":259},[27,193,269,28,29],"边缘计算",{"code":33,"slug":34,"name":28,"path":35,"parent_code":36},[272],{"code":154,"slug":273,"name":274,"path":275,"parent_code":201},"agricultural-ai","农业AI与大模型","\u002Ftopic\u002Fdigital-agriculture\u002Fagricultural-ai",{"status":39,"locked":14,"version":40,"method":41,"evidence":277},{"candidates":278,"agricultural_evidence":46},[279,286,290,296,300],{"code":154,"score":126,"supported":46,"title":280,"abstract":282,"tags":285},[281],"deep learning",[283,281,284],"深度学习","decision support",[193],{"code":33,"score":45,"supported":46,"title":287,"abstract":288,"tags":289},[48],[28,48],[28],{"code":74,"score":291,"supported":46,"title":292,"abstract":293,"tags":295},7,[],[135,294],"precision agriculture",[27],{"code":60,"score":291,"supported":46,"title":297,"abstract":298,"tags":299},[],[29,211],[29],{"code":301,"score":68,"supported":46,"title":302,"abstract":303,"tags":304},"I5",[],[269],[269],[306,307],"Raspberry Pi 玉米 生长阶段","PhenoCam 玉米 深度学习","RaspberryPi玉米生长阶段-3842","10.3390\u002Frs18193337",{"doi":309,"openalex_id":311,"authors":312,"venue":262,"cited_by_count":106,"oa_url":259,"card":337,"direction":112,"ingested_from":114},"W7214787420",[313,316,319,322,325,328,331,334],{"name":314,"orcid":315},"Anne Joice","https:\u002F\u002Forcid.org\u002F0000-0001-7499-9222",{"name":317,"orcid":318},"Humeera Tazeen","https:\u002F\u002Forcid.org\u002F0000-0003-2411-0725",{"name":320,"orcid":321},"Talha Tufaique","https:\u002F\u002Forcid.org\u002F0000-0002-4490-5341",{"name":323,"orcid":324},"Mathala Juliet Gupta","https:\u002F\u002Forcid.org\u002F0000-0002-3886-2429",{"name":326,"orcid":327},"Cannayen Igathinathane","https:\u002F\u002Forcid.org\u002F0000-0001-8884-7959",{"name":329,"orcid":330},"Nitin Rai","https:\u002F\u002Forcid.org\u002F0000-0002-9350-9601",{"name":332,"orcid":333},"Craig W. Whippo","https:\u002F\u002Forcid.org\u002F0000-0002-7626-6919",{"name":335,"orcid":336},"David Walter Archer","https:\u002F\u002Forcid.org\u002F0000-0002-4816-7040",{"tldr":338,"method":339,"finding":340,"direction":112,"opportunity":341},"用PhenoCam图像训练轻量深度学习模型，在树莓派上实时分类玉米8个生长阶段。","基于10个PhenoCam站点图像，开发4种轻量DL模型，在树莓派5上边缘推理。","ELiteCrop0表现最佳（CMDR=0.93），站点内精度0.90-0.93，但站点间泛化差（0","站点间泛化差是主要瓶颈，可研究跨站点迁移学习或域适应以提升模型鲁棒性。","2026-09-30T23:30:29.168194Z",{"id":344,"title":345,"url":346,"summary":347,"summary_zh":348,"content":9,"source_name":349,"source_url":346,"published_at":350,"category":12,"cover_url":9,"hotness":13,"is_selected":14,"score":351,"score_detail":352,"sources":354,"tags":356,"primary_topic":358,"secondary_topics":359,"classification":361,"search_phrases":383,"slug":386,"view_count":128,"doi":387,"paper":388,"created_at":406},3177,"A comparative analysis on maize yield prediction using sentinel 2A and Landsat 8 satellite image in Sundarganj, Gaibandha, Bangladesh","https:\u002F\u002Fdoi.org\u002F10.3329\u002Fbjar.v51i1.92530","Maize is an important cereal crops in Bangladesh. Over the last two decades, its cultivation has increased promisingly, especially in the Northern part of Bangladesh. The effective estimation of crop yields at a regional scale holds significant importance in facilitating decision-making within the agricultural sector, thereby ensuring grain security. The traditional ground-based measurement techniques suffer from inefficiencies, and there exists a need for a reliable, precise, and effective method for estimating regional crop yields. This study used remote sensing (RS) techniques for forecasting pre-harvest maize yield to improve the management system. Currently, the normalized difference vegetation index (NDVI) is widely used to predict crop yield including maize. However, the present study used Landsat 8 (~ 30 m) and Sentinel 2A (~ 10 m) high resolution data for 2018-2019 and 2019-2020 to predict maize yield based on the year 2020-2021 at Sundarganj Upazila in Gaibandha district. The single cloud free image acquisition date based on maximum NDVI for both satellite images was used for each maize growing period to develop a yield prediction model. A regression model was performed between NDVI values and 20 farmers field-level maize yields. The absolute mean error of prediction was about 10.30% for Landsat 8 and 6.70% for Sentinel 2A compared to the actual maize yield during 2020-2021. The study revealed that NDVI data extracted from Sentinel 2A high resolution satellite images can be successfully used to predict the maize yield with appreciable accuracy. Finally, this study has demonstrated the efficacy of combining multi-temporal remote sensing data for accurate maize yield estimation, aiding agricultural authorities and production enterprises in the timely formulation and refinement of cropping strategies and management policies for the ongoing season. Bangladesh J. Agril. Res. 51(1): 501-521, March 2026","玉米是孟加拉国重要的谷类作物。过去二十年间，其种植面积增长显著，尤其是在孟加拉国北部地区。在区域尺度上有效估算作物产量对于促进农业部门决策、进而保障粮食安全具有重要意义。传统的地面测量技术效率低下，亟需一种可靠、精确且有效的区域作物产量估算方法。本研究采用遥感（RS）技术预测收获前玉米产量，以改进管理体系。目前，归一化植被指数（NDVI）被广泛用于预测包括玉米在内的作物产量。然而，本研究利用Landsat 8（约30 m）和Sentinel 2A（约10 m）高分辨率数据，基于2018—2019年和2019—2020年的数据，对盖班达县孙达尔甘杰乌帕齐拉2020—2021年的玉米产量进行预测。在每个玉米生长期，选取两颗卫星影像中NDVI最大值对应的单幅无云影像获取日期，用于建立产量预测模型。对NDVI值与20户农民田块级玉米产量进行回归建模。与2020—2021年实际玉米产量相比，Landsat 8的绝对平均预测误差约为10.30%，Sentinel 2A约为6.70%。研究表明，利用Sentinel 2A高分辨率卫星影像提取的NDVI数据可成功用于预测玉米产量，且精度令人满意。最后，本研究证明了结合多时相遥感数据进行准确玉米产量估算的有效性，有助于农业主管部门和生产企业在当季及时制定和完善种植策略与管理政策。Bangladesh J. Agril. Res. 51(1): 501-521, March 2026","Bangladesh Journal of Agricultural Research","2026-09-21T00:00:00Z",65,{"impact":21,"substance":18,"depth":19,"authority":20,"freshness":21,"relevant":22,"comment":353},"基于Sentinel 2A与Landsat 8的玉米遥感估产对比研究，方法清晰、误差数据具体，对遥感估产有参考价值，但属区域小尺度研究，公共影响有限。",[355],{"name":349,"url":346},[27,133,28,29,357],"NDVI",{"code":33,"slug":34,"name":28,"path":35,"parent_code":36},[360],{"code":60,"slug":198,"name":199,"path":200,"parent_code":201},{"status":39,"locked":14,"version":40,"method":41,"evidence":362},{"candidates":363,"agricultural_evidence":46},[364,368,372,379],{"code":33,"score":45,"supported":46,"title":365,"abstract":366,"tags":367},[34],[28,34],[28],{"code":60,"score":188,"supported":46,"title":369,"abstract":370,"tags":371},[],[29,211],[357,133,29],{"code":373,"score":53,"supported":46,"title":374,"abstract":375,"tags":378},"A8",[],[376,377],"粮食安全","grain security",[],{"code":74,"score":22,"supported":14,"title":380,"abstract":381,"tags":382},[],[],[27],[384,385],"Sentinel 2A Landsat 8 玉米产量预测","孟加拉国 Sundarganj 玉米遥感估产","Sentinel2ALandsat8玉米产量预测-3177","10.3329\u002Fbjar.v51i1.92530",{"doi":387,"openalex_id":389,"authors":390,"venue":349,"cited_by_count":106,"oa_url":346,"card":401,"direction":112,"ingested_from":114},"W7213918280",[391,393,395,397,399],{"name":392,"orcid":9},"N Mohammad",{"name":394,"orcid":9},"MA Islam",{"name":396,"orcid":9},"MG Mahboob",{"name":398,"orcid":9},"MM Rahman",{"name":400,"orcid":9},"I Ahmed",{"tldr":402,"method":403,"finding":404,"direction":112,"opportunity":405},"用Sentinel 2A与Landsat 8的NDVI回归模型预测孟加拉国玉米产量并比较精度。","基于最大NDVI单期影像与20个农户地块产量做回归，比较两种卫星。","Sentinel 2A预测绝对平均误差6.70%，优于Landsat 8的10.30%。","可探索多时相NDVI与机器学习融合，提升小农户尺度玉米估产精度与迁移性。","2026-09-22T23:30:23.551878Z",{"id":408,"title":409,"url":410,"summary":411,"summary_zh":412,"content":9,"source_name":183,"source_url":410,"published_at":413,"category":12,"cover_url":9,"hotness":13,"is_selected":14,"score":185,"score_detail":414,"sources":416,"tags":418,"primary_topic":420,"secondary_topics":421,"classification":422,"search_phrases":442,"slug":445,"view_count":68,"doi":446,"paper":447,"created_at":480},3006,"Explainable spectral–image fusion multi-task learning for maize canopy biochemical and structural trait retrieval","https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.compag.2026.112450","Accurate and interpretable estimation of multiple maize canopy traits is important for proximal crop monitoring and high-throughput phenotyping. This study developed a spectral–image fusion multi-task learning framework (MM-MTL) for the simultaneous retrieval of chlorophyll index (Chl index), leaf area index (LAI), nitrogen balance index (NBI), and anthocyanin index (Anth index). Proximal hyperspectral observations were collected using a Specim IQ camera covering 400–1000 nm with 204 spectral bands. For each observation, an ROI-mean spectral vector was extracted to retain fine-grained canopy reflectance information, while a co-registered pseudo-RGB image derived from visible bands of the same hyperspectral cube preserved two-dimensional canopy structure and visible appearance. MM-MTL integrates spectral and image feature extraction, task-specific fusion, and uncertainty-weighted multi-task learning to jointly estimate the four traits. A total of 1,023 valid samples collected from nine field campaigns across the 2024 and 2025 growing seasons were used for model development and evaluation. Under plot-grouped five-fold cross-validation, MM-MTL achieved R 2 values of 0.872, 0.885, 0.722, and 0.807 for Chl index, LAI, NBI, and Anth index, respectively, and consistently outperformed the single-task, single-representation, and conventional regression baselines. Performance decreased under more challenging generalization settings, with R 2 values ranging from 0.543 to 0.680 under leave-one-campaign-out validation and from 0.425 to 0.640 under bidirectional cross-year validation. Ablation and post-hoc analyses further showed that preserving image spatial organization improved prediction, while task-wise routing, input-representation masking, wavelength perturbation, and cross-fold stability analyses revealed trait-dependent use of spectral and spatial information. These results demonstrate that complementary spectral and spatial representations derived from the same hyperspectral observation can improve multi-trait maize canopy retrieval, while transfer across acquisition campaigns, years, and field environments remains an important direction for further improvement.","准确且可解释地估算多个玉米冠层性状，对于近地作物监测和高通量表型分析具有重要意义。本研究开发了一种光谱—图像融合多任务学习框架（MM-MTL），用于同时反演叶绿素指数（Chl index）、叶面积指数（LAI）、氮平衡指数（NBI）和花青素指数（Anth index）。近地高光谱观测使用Specim IQ相机采集，覆盖400–1000 nm，共204个光谱波段。对于每次观测，提取ROI均值光谱向量以保留细粒度冠层反射率信息，同时从同一高光谱立方体的可见光波段生成配准的伪RGB图像，以保留二维冠层结构和可见外观。MM-MTL集成了光谱与图像特征提取、任务特定融合以及不确定性加权多任务学习，以联合估算这四种性状。研究使用2024年和2025年生长季9次田间试验采集的共计1,023个有效样本进行模型开发与评估。在按小区分组的五折交叉验证下，MM-MTL对Chl index、LAI、NBI和Anth index的R²分别为0.872、0.885、0.722和0.807，且持续优于单任务、单表征和传统回归基线。在更具挑战性的泛化设置下，模型性能有所下降，留一试验验证的R²范围为0.543–0.680，双向跨年验证的R²范围为0.425–0.640。消融分析和事后分析进一步表明，保留图像空间组织可提升预测性能，而任务路由、输入表征掩蔽、波长扰动和跨折稳定性分析揭示了光谱与空间信息的性状依赖性利用方式。这些结果表明，从同一高光谱观测中提取的互补光谱与空间表征可改善多性状玉米冠层反演，而跨采集试验、年份和田间环境的迁移仍是未来改进的重要方向。","2026-09-19T00:00:00Z",{"impact":126,"substance":127,"depth":126,"authority":187,"freshness":188,"relevant":22,"comment":415},"提出光谱-图像融合多任务学习框架，1023份样本跨两年验证，方法新颖且结论可靠，对作物高通量表型研究有实质参考价值。",[417],{"name":183,"url":410},[27,193,28,29,419],"高通量表型",{"code":33,"slug":34,"name":28,"path":35,"parent_code":36},[],{"status":39,"locked":14,"version":40,"method":41,"evidence":423},{"candidates":424,"agricultural_evidence":46},[425,429,434,438],{"code":33,"score":45,"supported":46,"title":426,"abstract":427,"tags":428},[34],[28,34],[28],{"code":60,"score":68,"supported":46,"title":430,"abstract":431,"tags":433},[],[432],"hyperspectral",[29],{"code":74,"score":22,"supported":14,"title":435,"abstract":436,"tags":437},[],[],[27],{"code":154,"score":22,"supported":14,"title":439,"abstract":440,"tags":441},[],[],[193],[443,444],"玉米冠层 多任务学习 高光谱","Specim IQ 玉米 表型","玉米冠层多任务学习高光谱-3006","10.1016\u002Fj.compag.2026.112450",{"doi":446,"openalex_id":448,"authors":449,"venue":183,"cited_by_count":106,"oa_url":410,"card":475,"direction":112,"ingested_from":114},"W7213658705",[450,452,454,456,458,461,463,466,468,470,472],{"name":451,"orcid":9},"Penglei Zhang",{"name":453,"orcid":9},"Tianbo Hao",{"name":455,"orcid":9},"Zhuoyuan Zhao",{"name":457,"orcid":9},"Hong Sun",{"name":459,"orcid":460},"Yelu Zeng","https:\u002F\u002Forcid.org\u002F0000-0003-4267-1841",{"name":462,"orcid":9},"Zheng Cui",{"name":464,"orcid":465},"Ta Na","https:\u002F\u002Forcid.org\u002F0000-0002-1348-5655",{"name":467,"orcid":9},"Lang Qiao",{"name":469,"orcid":9},"Durval Dourado Neto",{"name":471,"orcid":9},"Feng Yang",{"name":473,"orcid":474},"Jingzhu Wu","https:\u002F\u002Forcid.org\u002F0000-0002-8386-1038",{"tldr":476,"method":477,"finding":478,"direction":112,"opportunity":479},"提出光谱-图像融合多任务学习框架，同时反演玉米冠层四个生化与结构性状。","Specim IQ高光谱与伪RGB融合，不确定性加权多任务学习，1023样本交叉","融合模型精度优于单任务基线，但跨年份与跨环境泛化性能明显下降。","可研究跨年份\u002F跨环境域适应与迁移学习，提升多性状反演泛化能力。","2026-09-20T23:30:01.739142Z",{"id":482,"title":483,"url":484,"summary":485,"summary_zh":9,"content":9,"source_name":486,"source_url":484,"published_at":487,"category":12,"cover_url":9,"hotness":13,"is_selected":14,"score":488,"score_detail":489,"sources":491,"tags":493,"primary_topic":496,"secondary_topics":497,"classification":504,"search_phrases":534,"slug":537,"view_count":166,"doi":538,"paper":539,"created_at":557},2291,"Optimal management practices of nitrogen and irrigation for the trade-off between economy and environment for maize in China","https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.agsy.2026.104970","Optimal management practices of nitrogen and irrigation for the trade-off between economy and environment for maize in China。Agricultural Systems","Agricultural Systems","2026-09-12T00:00:00Z",78,{"impact":126,"substance":18,"depth":126,"authority":187,"freshness":21,"relevant":22,"comment":490},"核心期刊论文，提出中国玉米氮肥与灌溉协同优化管理策略，兼顾经济与环境权衡，对农业绿色生产与精准水肥管理有参考价值。",[492],{"name":486,"url":484},[27,28,494,495,30],"农业绿色发展","水肥一体化",{"code":33,"slug":34,"name":28,"path":35,"parent_code":36},[498],{"code":499,"slug":500,"name":501,"path":502,"parent_code":503},"H3","irrigation","水资源与灌溉","\u002Ftopic\u002Fenvironment\u002Firrigation","H",{"status":39,"locked":14,"version":40,"method":41,"evidence":505},{"candidates":506,"agricultural_evidence":46},[507,511,516,520,525,530],{"code":33,"score":17,"supported":46,"title":508,"abstract":509,"tags":510},[34],[34],[28],{"code":499,"score":512,"supported":46,"title":513,"abstract":514,"tags":515},11,[500],[500],[],{"code":67,"score":166,"supported":14,"title":517,"abstract":518,"tags":519},[],[],[30,495],{"code":521,"score":22,"supported":14,"title":522,"abstract":523,"tags":524},"H4",[],[],[494],{"code":526,"score":22,"supported":14,"title":527,"abstract":528,"tags":529},"H8",[],[],[494],{"code":74,"score":22,"supported":14,"title":531,"abstract":532,"tags":533},[],[],[27],[535,536],"农业绿色发展 水肥一体化 智慧农业 氮肥管理","农业绿色发展 水肥一体化","农业绿色发展水肥一体化智慧农业氮肥管理-2291","10.1016\u002Fj.agsy.2026.104970",{"doi":538,"openalex_id":540,"authors":541,"venue":486,"cited_by_count":106,"oa_url":484,"card":9,"direction":9,"ingested_from":114},"W7212404025",[542,545,547,549,551,553,555],{"name":543,"orcid":544},"Yu Ye","https:\u002F\u002Forcid.org\u002F0000-0002-6744-3338",{"name":546,"orcid":9},"Xingrui Liu",{"name":548,"orcid":9},"Yuanyuan Chen",{"name":550,"orcid":9},"Shuzhu Shi",{"name":552,"orcid":9},"Zhaocong Wu",{"name":554,"orcid":9},"Kaiping Zhang",{"name":556,"orcid":9},"Rui Xiao","2026-09-13T23:30:05.153684Z"]