作物学报Issue(8)：1443-1451,9.DOI:10.3724/SP.J.1006.2014.01443
利用鱼眼影像技术反演不同株型水稻的冠层结构参数
Inversion of Rice Canopy Construction Parameters from the Hemispherical Photograph
摘要
Abstract
It is important to find a fast, reliable and accurate method for estimating canopy construction parameters in the study of vegetation-climate interaction. In the present study, three rice varieties with different canopy structures were chosen as experi-mental materials. A digital camera with a fisheye lens was used to take photos in eight heights of rice canopy to develop a new approach for concluding rice canopy. Canopy gaps were extracted from those photos, and then leaf area index (LAI) and mean leaf angle (MLA) could be inversed by Beer-Lambert theory, based on the quantitative relationship between the radiation condi-tion and the canopy structure. Results showed that LAI inverted from the hemispherical photograph was 7.6%-13.1%less than that measured manually, and the root mean square error (RMSE) between them was 1.2-1.5. The data showed that hemispherical photography was better than Sunscan canopy system. Moreover, MLA inverted from the hemispherical photograph was related to that measured manually with 0.9205**of correlation coefficient and 11.7° of RMSE. Therefore, hemispherical photography is a feasible technology to indirectly measure the rice canopy structure.关键词
鱼眼影像/水稻/冠层结构参数/叶面积指数/平均叶倾角Key words
Hemispherical photograph/Rice/Canopy construction parameter/Leaf area index/Mean leaf angle引用本文复制引用
胡凝,吕川根,姚克敏,张晓翠..利用鱼眼影像技术反演不同株型水稻的冠层结构参数[J].作物学报,2014,(8):1443-1451,9.基金项目
本研究由国家自然科学基金项目(30871479)和江苏省农业气象重点实验室开放课题(KYQ1203)资助。 （30871479）
