新疆农业科学2017，Vol.54Issue(6)：981-987,7.DOI:10.6048/j.issn.1001-4330.2017.06.001
基于植被指数的棉花冠层光合有效辐射截获量和叶片净光合速率估算研究
Estimation of Cotton Canopy Fractional Interception of Absorbed Photosynthetic Active Radiation and Leaf Net Photosynthetic Rate Based on Hyperspectral Vegetation Index
摘要
Abstract
[Objective] This project aims to analyze the correlation between vegetation indices and fraction interception of absorbed photosynthetically active radiation (FAPAR),leaf net photosynthetic rate (Pn) of cotton in different water treatments,so that the vegetation indices will be used to retrieve FAPAR and Pn in order to realize the non-contact,non-destructive,rapid,real-time,large-area monitoring of cotton growth.[Method] Canopy hyperspectral reflectance data,photosynthetically active radiation(PAR) and leaf net photosynthetic rate of cotton Xinluzao No.33 with different irrigation treatments were recorded in field experiments by the ASD Fieldspec Pro FR 2500 spectroradiometer,LI-190SA linear quantum sensor and LI-6400 portable photosynthesis system at cotton key growth stages.[Result] The results showed that both of cotton FAPAR and Pn reached the maximum values at flowering and boll-forming stages and the minimum values at the boll opening period.Their models were all highly significant correlated at 1％ level by the renormalized vegetation indices (RDVI),difference vegetation indices (DVI),enhanced vegetation indices (EVI) and photochemical reflectance indices (PRI) and FAPAR,Pn,respectively.The highly correlated ones were EVI and PRI with FAPAR,Pn (rEvI-FAPAR =0.686,3,RMSE =0.04,r PRI-Pn =0.644,7,RMSE =3.39),respectively.The FAPAR and PN were estimated by using the model equation with the highest correlation function,and the measured value and the estimated value of the model were extremely significant (rmeasured-FAPAR-estimated-FAPAR =0.805,4**,rmessurd Pn-estimated Pn =0.760,9**).[Conclusion] In conclusion,hyperspectral vegetation indices can be used to extract information of photosynthetic physiological parameters of cotton without causing any damage.关键词
植被指数/棉花/光合有效辐射截获量/叶片净光合速率/估算Key words
vegetation index/cotton/fraction interception of absorbed photosynthetically active radiation/leaf net photosynthetic rate/estimation分类
农业科技引用本文复制引用
田春燕,黄春燕,郭晓飞,刘馨月,王登伟..基于植被指数的棉花冠层光合有效辐射截获量和叶片净光合速率估算研究[J].新疆农业科学,2017,54(6):981-987,7.基金项目
National Natural Science Foundation of China(31560354) and Science and Technology Activities Project of Returned Personnel of Ministry of Human Resources and Social Security(RSLX201303)国家自然科学基金项目(31560354) （31560354）
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）
