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《China Rice》 2017-04
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Research of Canopy Spectral Characteristics of the Late Rice Populations with Organic Manure and Chemical Fertilizers

ZHENG Huabin;CHEN Can;FU Zhiqiang;HUANG Huang;College of Agronomy, Hunan Agricultural University/Observation station of Crop Cultivation Science in Central China, Ministry of agriculture;  
Based on different fertilization patterns, the canopy spectral reflectance, the first derivative spectra and normalized spectral characteristics of late rice, and a correlation among leaf nitrogen content, nitrogen accumulation, yield, leaf area index and leaf dry matter accumulation were analyzed. Then the rice nitrogen nutrition diagnosis model with high spectral characteristic parameters as in-dependent variables was constructed. The results showed that: there has a great relevance between leaf nitrogen content with canopy spectral reflectance at 665 nm(p0.001), the same with the first derivative spectra at 554 nm and 672 nm(p 0.001); There has an exponential function by λr: y=684.91e0.028 x, the coefficient of determination(R2)was 0.90, and an exponential function by(SDr-SDb)/(SDr+SDb):y=0.66e0.11 x, the coefficient of determination(R2)was 0.88, these two model could diagnose the late rice nitrogen nutrition well under the conditions of organic manure and chemical fertilizers.
【Fund】: 基金项目 湖南双季稻区水稻生长指标光谱监测技术体系的施肥应用(201303109-3);; 国家水稻丰产科技工程“长江中游南部(湖南)水稻丰产节水节肥技术集成与示范”(2013BAD07B11)
【CateGory Index】: S511.33
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