| 基于SPAD-502与GreenSeeker的冬小麦氮营养诊断研究 |
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| 引用本文： | 胡 昊,白由路,杨俐苹,卢艳丽,王 磊,王 贺,王志勇.基于SPAD-502与GreenSeeker的冬小麦氮营养诊断研究[J].中国生态农业学报,2010,18(4):748-752. |
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| 作者姓名： | 胡 昊 白由路 杨俐苹 卢艳丽 王 磊 王 贺 王志勇 |
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| 作者单位： | 中国农业科学院农业资源与农业区划研究所,农业部植物营养学重点开放实验室,北京,100081 |
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| 基金项目： | 国家科技支撑计划项目(2008BADA4B03)、国家高技术研究发展计划(863计划)项目(2006AA10A302) |
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| 摘 要： | 用GreenSeeker和SPAD-502测定了不同氮素处理的冬小麦冠层NDVI与叶片SPAD值, 分析了它们与叶片全氮、叶绿素含量及产量间的关系。结果表明: 冬小麦抽穗期SPAD值和NDVI值均与叶绿素含量呈极显著正相关; 除抽穗期和返青期外, SPAD值与叶氮含量、叶绿素含量的相关系数在其余各生育期均达到显著或极显著水平; NDVI值与叶氮含量、叶绿素含量在拔节期、乳熟期的相关性同SPAD值一致; SPAD值可以进行叶绿素的诊断, NDVI值可以进行氮的诊断。氮营养诊断时期应该选择拔节期。通过回归建立了基于SPAD值、NDVI值的产量估测模型, 可以通过SPAD值、NDVI值对冬小麦产量进行估算。
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| 关 键 词： | 冬小麦 氮 营养诊断 SPAD-502 GreenSeeker |
Diagnosis of nitrogen nutrition in winter wheat (Triticum aestivum) via SPAD-502 and GreenSeeker |
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| HU Hao,BAI You-Lu,YANG Li-Ping,LU Yan-Li,WANG Lei,WANG He and WANG Zhi-Yong.Diagnosis of nitrogen nutrition in winter wheat (Triticum aestivum) via SPAD-502 and GreenSeeker[J].Chinese Journal of Eco-Agriculture,2010,18(4):748-752. |
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| Authors: | HU Hao BAI You-Lu YANG Li-Ping LU Yan-Li WANG Lei WANG He and WANG Zhi-Yong |
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| Institution: | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences; Key Laboratory for Plant Nutrition and Nutrient Cycling, Ministry of Agriculture, Beijing 100081, China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences; Key Laboratory for Plant Nutrition and Nutrient Cycling, Ministry of Agriculture, Beijing 100082, China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences; Key Laboratory for Plant Nutrition and Nutrient Cycling, Ministry of Agriculture, Beijing 100083, China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences; Key Laboratory for Plant Nutrition and Nutrient Cycling, Ministry of Agriculture, Beijing 100084, China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences; Key Laboratory for Plant Nutrition and Nutrient Cycling, Ministry of Agriculture, Beijing 100085, China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences; Key Laboratory for Plant Nutrition and Nutrient Cycling, Ministry of Agriculture, Beijing 100086, China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences; Key Laboratory for Plant Nutrition and Nutrient Cycling, Ministry of Agriculture, Beijing 100087, China |
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| Abstract: | Leaf SPAD and canopy NDVI of winter wheat under different nitrogen treatments were analyzed using GreenSeeker and SPAD-502 with the aim of building a quick, timely and accurate method for diagnosing nitrogen nutrition. The results show significant positive correlations among leaf SPAD, canopy NDVI and chlorophyll content. Correlation coefficients for leaf SPAD and leaf N and chlorophyll content are significant, except during heading and reviving stages. Correlations for canopy NDVI with leaf N and chlorophyll content at jointing and milking stages are similar to that for leaf SPAD. While SPAD can be used to evaluate chlorophyll content, NDVI can be used to assess nitrogen content. The recommended period for diagnosing nitrogen status is jointing stage. Using SPAD and NDVI, a linear regression model is developed for assessing yield of winter wheat. |
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| Keywords: | Winter wheat Nitrogen Nutrition diagnosis SPAD-502 GreenSeeker |
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