不同光谱指数反演马铃薯叶片氮累积量的研究

韩康, 于静, 石晓华, 崔石新, 樊明寿

Inversion of nitrogen accumulation in potato leaf with different spectral indices

HAN Kang, YU Jing, SHI Xiao-Hua, CUI Shi-Xin, FAN Ming-Shou

表6 光谱指数与叶片氮累积量的回归模型

Table 6 Regression models of potato spectral indices and leaf nitrogen accumulation

生育时期 Growth stage	监测模型方程式 Monitoring model equation	R²
苗期Seedling stage	LNA = - 269.271 × VOG3 - 16.5	0.882^**
苗期Seedling stage	LNA = 1976.733 × VOG3² + 211.143 × VOG3 + 11.236	0.913^**
	LNA = 1.712 × e^{-17.519 × VOG3}	0.908^**
块茎形成期Tuber formation stage	LNA = - 323.22 × VOG3 - 21.257	0.771^**
块茎形成期Tuber formation stage	LNA = 1393.778 × VOG3² + 162.368×VOG3 + 17.484	0.790^**
	LNA = 4.841 × e^{-10.411 × VOG3}	0.740^**
块茎膨大期Tuber expansion stage	LNA = - 403.678 × VOG3 - 34.233	0.723^**
块茎膨大期Tuber expansion stage	LNA = 1020.908 × VOG3² - 20.441 × VOG3 - 0.711	0.741^**
	LNA = 4.249 × e^{-11.184 × VOG3}	0.741^**
淀粉积累期Starch accumulation stage	LNA = - 279.991 × VOG2 - 8.249	0.550^**
淀粉积累期Starch accumulation stage	LNA = - 654.51 × VOG2² - 464.961 × VOG2 - 20.102	0.555^**
	LNA = 4.894 × e^{-11.837 × VOG2}	0.570^**
全生育时期Total growth stages	LNA = - 328.711 × VOG3 - 21.683	0.765^**
全生育时期Total growth stages	LNA = 832.343 × VOG3² - 46.576 × VOG3 - 0.242	0.778^**
	LNA = 3.867 × e^{-11.534 × VOG3}	0.773^**