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
表3 玉米各生育时期叶片分层方法
Table 3 Leaf stratification method at different growth stages of maize
层位
Layer
生育时期 Growth stage
V9 V12 R1 R3
上层叶片
Upper leaf
上三叶
Upper three blades
上四叶
Upper four blades
穗三叶以上所有叶片
All leaves above three leaves of the corn ear
穗三叶以上所有叶片
All leaves above three leaves of the corn ear
中层叶片
Middle leaf
中三叶
Middle three blades
中四叶
Middle four blades
穗三叶
Three leaves of the corn ear
穗三叶
Three leaves of the corn ear
下层叶片
Lower leaf
下三叶
Lower three blades
下四叶
Lower four blades
穗三叶以下所有叶片
All leaves below three leaves of the corn ear
穗三叶以下所有叶片
All leaves below three leaves of the corn ear