Evaluation of green, red, and near infrared bands for predicting winter wheat biomass, nitrogen uptake, and final grain yield
Evaluation of green, red, and near infrared bands for predicting winter wheat biomass, nitrogen uptake, and final grain yield
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DOI：
10.1081/pln-200025858
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发表时间：
2004-01-01
影响因子：
2.1
通讯作者：
Solie, JB
中科院分区：
文献类型：
--
作者：
Moges, SM;Raun, WR;Solie, JB
目前，基于红色（RNDVI）或绿色（GNDVI）反射率的归一化植被指数（NDVI）通常用于评估植物健康、生物量和营养含量。本研究旨在确定这两个指标中哪一个与冬小麦生物量、牧草氮（N）吸收量和最终籽粒产量相关性更高。2001年秋天，在俄克拉荷马州的斯蒂尔沃特建立了三个实验点。在Feekes生长阶段4，6和10.5，然后由冬小麦牧草收获光谱反射率测量。当在特定的生长阶段进行评估时，RNDVI始终比GNDVI与生物量高度相关。绿色植被指数和RNDVI更高的相关性与牧草氮吸收比与干生物量在每个阶段的增长，但没有一个指标似乎有一个比较优势。这两个指数都与所有地点的最终籽粒产量和籽粒吸氮量高度相关。这两个指数似乎有一个相当大的优势，比其他的，这表明，无论是将执行同样好，当预测饲料氮吸收，粮食产量，粮食氮吸收在冬小麦。红色NDVI似乎是一个更好的预测饲料生物量，特别是在生长的早期阶段。
Presently normalized difference vegetative indexes (NDVI) based on red (RNDVI) or green (GNDVI) reflectance are commonly used to evaluate plant health, biomass, and nutrient content. This study was conducted to determine which of these two indexes is more correlated with biomass, forage nitrogen (N) uptake, and final grain yield of winter wheat. Three experimental sites were established in Oklahoma in the fall of 2001 at Stillwater. Spectral reflectance measurements were taken at Feekes growth stage 4, 6, and 10.5 followed by winter wheat forage harvest. When evaluated at specific stages of growth, RNDVI was consistently more highly correlated with biomass than GNDVI. Green NDVI and RNDVI were more highly correlated with forage N uptake than with dry biomass at each stage of growth, but neither index appeared to have a comparative advantage over the other. Both indexes were highly correlated with final grain yield and grain N uptake across all locations. Neither index appeared to have a sizeable advantage over the other, suggesting that either will perform equally well when predicting forage N uptake, grain yield, and grain N uptake in winter wheat. Red NDVI does appear to be a better predictor of forage biomass, specifically at earlier stages of growth.