光谱学与光谱分析, 2012, 32 (5): 1362, 网络出版: 2012-06-14
基于高光谱的膜下滴灌小麦氮素营养评价研究
Estimated Nitrogen Nutrition Index Based on the Hyperspectral for Wheat of Drip Irrigation under Mulch
小麦 氮素评价指标 氮肥偏生产力 光谱参量 Wheat Nitrogen assessment index Partial factor productivity from applied N (PFPn) Spectral parameters
摘要
通过小麦氮素和品种对比试验, 分析不同氮素和品种处理小麦生育期氮肥偏生产力与光谱参数的相关关系, 建立小麦氮肥偏生产力的光谱参数估算模型, 结果表明绿度植被指数(GREENNDVI)在拔节期与小麦氮肥偏生产力呈极显著相关, 相关系数0.640 4。 用GREENNDVI在拔节期建立小麦氮肥偏生产力的估算模型, 均方根误差0.459 7。 研究表明利用光谱参数可以有效地估算小麦氮肥偏生产力。
Abstract
The accurate wheat management needs a reasonable nitrogen application, and it is one of the key measures for real-time and quantitatively monitoring of nitrogen status to gain the higher yield of wheat. In the present study, two field experiments were conducted with different nitrogen stress and wheat cultivars, the relationship was analyzed between spectral parameters and the partial factor productivity from applied N (PFPn), and the estimating model was established for PFPn in the growth stages of wheat. The result indicated that there was a highly significant correlation between the PFPn and GreenNDVI at jointing, the correlation coefficient (r) was 0.640 4, the estimating model of PFPn was established, and the root mean square errors(RMSE) was 0.459 7. The result indicated that the PFPn can be effectively estimated by using spectral parameters.
刁万英, 李少昆, 王克如, 金秀良, 王方永, 陈兵, 王琼, 王楷, 肖春华. 基于高光谱的膜下滴灌小麦氮素营养评价研究[J]. 光谱学与光谱分析, 2012, 32(5): 1362. DIAO Wan-ying, LI Shao-kun, WANG Ke-ru, JIN Xiu-liang, WANG Fang-yong, CHEN Bing, WANG Qiong, WANG Kai, XIAO Chun-hua. Estimated Nitrogen Nutrition Index Based on the Hyperspectral for Wheat of Drip Irrigation under Mulch[J]. Spectroscopy and Spectral Analysis, 2012, 32(5): 1362.