施氮量对高粱产量、品质及氮利用效率的影响
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曹晓燕, 武爱莲, 王劲松, 董二伟, 焦晓燕
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Effects of Nitrogen Fertilization on Yield, Quality and Nitrogen Utilization Efficiency of Sorghum
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Cao Xiaoyan, Wu Ailian, Wang Jinsong, Dong Erwei, Jiao Xiaoyan
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表8 籽粒产量、淀粉含量和淀粉产量（y）与叶鞘硝态氮含量（x）的关系
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Table 8 Relationship between grain yield, starch content and starch yield with NO3--N concentration in leaf sheaths
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| 生育期Growth stage | 指标Index | 响应曲线Regression equation | 决定系数Coefficient of determination (R2) | P | | 拔节期Booting | 籽粒产量 | y=9.88x0.13 | 0.211 | 0.024 | | 籽粒淀粉含量 | y=-1.21E-10x3+1.41E-6x2-0.005x+71.78 | 0.724 | 0.000 | | 淀粉产量 | y=7.49x0.12 | 0.166 | 0.048 | | 花期Anthesis | 籽粒产量 | y=11.00x0.12 | 0.197 | 0.030 | | 籽粒淀粉含量 | y=75.03x0.02 | 0.720 | 0.000 | | 淀粉产量 | y=8.25x0.10 | 0.153 | 0.058 | | 灌浆期Filling | 籽粒产量(y) | y=17.27x0.04 | 0.021 | 0.494 | | 籽粒淀粉含量(y) | y=73.88x0.01 | 0.523 | 0.000 | | 淀粉产量(y) | y=12.76x0.03 | 0.010 | 0.640 |
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