新疆农业科学2017，Vol.54Issue(1)：20-26,7.DOI:10.6048/j.issn.1001-4330.2017.01.003
不同水分处理条件下棉花高光谱植被指数与光合参数的相关分析
Correlation Analysis between Hyperspectral Vegetation Indices and Photosynthetic Parameters of Cotton under Different Water Treatments
摘要
Abstract
[Objective] To establish a correlation model between cotton hyperspectral data and photosynthetic characteristic parameters in the hope of providing a scientific foundation for effective,rapid,non-destructive diagnose and surveillance of cotton growth process in large area.[Method] Using ASD hyperspectral radiometer and Li-6400 photosynthetic instrument,the hyperspectral data of the two varieties Xinluzao No.13 and No.33 in key growth stages and photosynthetic parameters were obtained by five water treatments:net photosynthetic rate (Pn) and stomatal conductance (Gs) were calculated using hyperspectral data to obtain the normalized difference vegetation index (NDVI),ratio vegetation index (RVI) and the second modified soil adjusted vegetation index (MSAVI2) of the two cotton cultivars,thus establishing the linear,logarithmic and power function correlation equations of Pn and Gs,respectively.[Result] The results showed that three type function models were of significant and extremely significant correlation,and the R value of the equation of the three models in the two varieties RV[and Pn and Gs was higher,among which,using Xinluzao 33 RVI and Pn,Gs power function equation to estimate the Pn and Gs and carry on correlation analysis of the predicted value of Pn and Gs with the measured value,it was found that R value reached a very significant level (R measured pn =0.827,RMSE =1.089,R measured gs-estimation gs =0.586,RMSE =0.138,n =20,P ＜ 0.01).The estimation accuracy of the model equation was greater than 80％.[Conclusion] There was a significant correlation between the spectral vegetation indexes and photosynthetic parameters of the two cotton varieties under different water treatments and the correlation model could be used to estimate the Pn and Gs,and real-time monitoring of the growth status of cotton.关键词
棉花/光合参数/光谱植被指数/相关性Key words
cotton/photosynthetic parameter/hyperspectral vegetation index/correlation analysis分类
农业科技引用本文复制引用
郭晓飞,黄春燕,田春燕,刘馨月,王登伟..不同水分处理条件下棉花高光谱植被指数与光合参数的相关分析[J].新疆农业科学,2017,54(1):20-26,7.基金项目
National Natural Science Foundation of China(31560354) （31560354）
Science and technology activity projects of overseas returnees of Ministry of Human Resources and Social Security of the P.R.China (RSLX201303)国家自然科学基金项目 (31560354) （RSLX201303）
人力资源和劳动社会保障部留学回国人员科技活动项目(RSLX201303) （RSLX201303）
