摘要
在这研究，在美国做的一个 ASD 分光计被用来在北方 Xinjiang 在华盖导出棉花叶子的 hyperspectral 数据。红边的不可分的区域变量被用来在华盖在棉花叶子估计全部的氮(TN ) 内容。反射系列微分的第一份订单被执行。分析方法基于光谱位置变量从第一份订单被导出微分光谱数据。在红边的不可分的区域之间的关联上的分析( SDr ，认为是独立变量)并且 TN 内容(认为是功能)被执行，并且在在棉花变化的华盖叶子的红边和 TN 内容的不可分的区域之间的数学模型作为 Xinluzao 说出 No.6 的关联被开发。在在单个棉花的叶绿素内容和 TN 内容之间的关联上的分析在华盖与不同的水体积在灌溉下面成长离开被执行。结果证明在叶绿素内容和 TN 内容之间有重要积极关联(R = 0.8723， n = 39 ) ，并且叶绿素内容的数据能被用来在单个棉花叶子估计 TN 内容；在在在华盖的棉花叶子的红边和 TN 内容的不可分的区域变量之间的关联是重要的，他们的关联系数是 0.7394 ( n = 40 )，在作为 Xinluzao 号码 6 和号码 8 罐头说出的棉花变化的华盖叶子的 TN 内容被使用发达模型精确地估计，并且他们的 RMSE 价值分别地是 0.3859 和 0.4272 。在研究以后，有一个适用的潜力使用红边的不可分的区域变量在华盖在棉花叶子估计 TN 内容，这被考虑，并且数学模型与第三方面的区域变量发展了让高适用在在庄稼华盖导出 TN 内容珍视。认出应力由研究移动和红边的变化程度由棉花植物承受了的潮湿是可行的，这也被考虑，并且钥匙是开发相应合理识别索引系统。
In this study, an ASD spectrometer made in USA is used to derive the hyperspectral data of cotton leaves in canopy in north Xinjiang. The integral area variables of red edge are used to estimate the total nitrogen （TN） content in cotton leaves in canopy. The first order differential of reflective spectra is carried out. The analysis methods based on the spectral position variables are derived from the first order differential spectral data. The analysis on the correlation between the integral area of red edge （SDr, regarded as the independent variable） and the TN content （regarded as the function） is carried out, and the correlation mathematical model between the integral area of red edge and the TN content in canopy leaves of cotton varieties named as Xinluzao No.6 is developed. The analysis on the correlation between the chlorophyll content and the TN content in single cotton leaves in canopy growing under the irrigation with different water volumes is carried out. The results show that there is a significant positive correlation between the chlorophyll content and the TN content （R = 0.8723, n = 39）, and the data of chlorophyll content can be used to estimate the TN content in single cotton leaves; the correlation between the integral area variable of red edge and the TN content in cotton leaves in canopy is significant, their correlation coefficient is 0.7394 （n =40）, the TN contents in canopy leaves of cotton varieties named as Xinluzao No. 6 and No. 8 can be accurately estimated by using the developed model, and their RMSE values are 0.3859 and 0.4272 respectively. After researching, it is considered that there is an applying potential to use the integral area variables of red edge for estimating the TN content in cotton leaves in canopy, and the mathematical model developed with the third-side area variables has a high applying value in deriving the TN content in crop canopy. It is also considered that it is feasible to recognize the moisture stress suffered by cotton plants by researching the shift and change extent of red edge, and the key is to develop the corresponding rational recognition index system.
关键词
水应力
棉花
光谱数据
生物量
moisture stress, cotton, cotton leave in canopy, hyper. spectral data, biomass, change.
作者简介
Correspondence should be addressed to Sun Li （email： lisun6163@ sina.com）
