[Effects of water stress on red-edge parameters and yield in wheat cropping].
[Effects of water stress on red-edge parameters and yield in wheat cropping].
复制标题
DOI：
--
复制
发表时间：
2013-08
期刊：
影响因子：
--
通讯作者：
Kexun He;Shu-He Zaho;Jianbin Lai;Yun-xiao Luo;Zhi-hao Qin
中科院分区：
文献类型：
--
作者：
Kexun He;Shu-He Zaho;Jianbin Lai;Yun-xiao Luo;Zhi-hao Qin
利用水分胁迫试验获得的田间小麦光谱数据，研究了水分胁迫对小麦光谱红边参数的影响。首先，分析了水分胁迫对小麦光谱反射率的影响。然后通过小麦光谱一阶微分计算得到小麦红边位置和红边峰，分析水分胁迫对小麦红边参数的影响。最后讨论了红峰与小麦产量的关系。结果表明：在水分胁迫试验下，小麦红边位置在生育期初期呈现“红移”，在生育期后期呈现“蓝移”；小麦红边峰在生育期初期随着水分胁迫的加剧而增大，随后随着水分胁迫的加剧而减小。伸长期前小麦红边峰与产量呈正相关，伸长期后呈负相关。
The objective of the present paper is to study the influence of water stress on wheat spectrum red edge parameters by using field wheat spectrum data obtained from water stress experiment. Firstly, the authors analyzed the influence of water stress on wheat spectrum reflectance. Then the authors got the wheat red edge position and red edge peak through calculating wheat spectrum first-order differential and analyzed the influence of water stress on wheat red edge parameters. Finally the authors discussed the relationship between red peak and wheat yield. The results showed that the wheat red edge position shows "red shift" at the beginning of the wheat growth period and "blue shift" at the later period of the wheat growth period under the water stress experiment. Also, the red edge peak of the wheat showed that red edge peak increased with the water stress sharpening at the beginning of the wheat growth period, and then the red edge peak reduced with the water stress sharpening. The wheat red edge peak presented positive correlation with the wheat yield before the elongation period, and exhibited negative correlation after that period.