基于无人机多光谱数据和氮素空间分异的玉米冠层氮浓度估算

郝琪, 陈天陆, 王富贵, 王振, 白岚方, 王永强, 王志刚

Estimation of canopy nitrogen concentration in maize based on UAV multi- spectral data and spatial nitrogen heterogeneity

HAO Qi, CHEN Tian-Lu, WANG Fu-Gui, WANG Zhen, BAI Lan-Fang, WANG Yong-Qiang, WANG Zhi-Gang

图6 基于节点纯度增加值的V9 (A)、V12 (B)、R1 (C)和R3 (D)冠层氮浓度有效叶层确定 Increase in node purity代表不同层位叶片氮浓度的重要性, 该值越大表示相应层位叶片氮浓度越重要。缩略词同表2。

Fig. 6 The canopy nitrogen concentration of V9 (A), V12 (B), R1 (C), and R3 (D) effectively determined by the leaf layer based on the added value of node purity Increase in node purity represents the importance of leaf nitrogen concentration in different strata, and a larger value indicates a greater importance of leaf nitrogen concentration in the corresponding stratum. Abbreviations are the same as those given in Table 2.