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
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郝琪, 陈天陆, 王富贵, 王振, 白岚方, 王永强, 王志刚
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Estimation of canopy nitrogen concentration in maize based on UAV multi- spectral data and spatial nitrogen heterogeneity
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HAO Qi, CHEN Tian-Lu, WANG Fu-Gui, WANG Zhen, BAI Lan-Fang, WANG Yong-Qiang, WANG Zhi-Gang
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表3 玉米各生育时期叶片分层方法
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Table 3 Leaf stratification method at different growth stages of maize
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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 |
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