Preliminary analysis on difference of nadir reflectance of canopy and its affecting factors in different rice varieties
2008
Xu Zhengjin | Chen Wenfu | Zhang Wenzhong
chinois. 目的】揭示结实期冠层垂直反射率与群体和株型性状关系。【方法】以辽宁省56个水稻品种（品系）为试材进行田间试验。【结果】冠层垂直反射率存在显著而稳定的品种间差异,与颈穗弯曲度呈极显著的正相关,与比叶重和叶宽呈显著或极显著的负相关,与叶面积指数的关系有待进一步研究。【结论】颈穗弯曲度是影响冠层垂直反射率的主要因素,进一步揭示了直立穗型水稻品种产量潜力高的生理基础。
Afficher plus [+] Moins [-]anglais. [Objective] Revealing the relationships among nadir reflectance of canopy, population and plant type characters in grain-filling period. [Method] Fifty-six rice varieties were used as materials to study in a field experiment. [Result] The differences of nadir reflectance of canopy were significant and stable in different rice varieties. The nadir reflectance of canopy was in extremely significant positive correlation with the curvature of panicle neck, and in significant or extremely significant negative correlation with the leaf weight ratio and leaf width. The relationship between the nadir reflectance of canopy and leaf area index remained to be further researched. [Conclusion] The curvature of panicle neck was the main factor which affected the nadir reflectance of canopy. The physiological basis that yield potential of rice varieties with erect panicle type was high was further revealed.
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