氮肥对非充分灌溉下棉花花铃期光合特性及产量的补偿作用
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石洪亮,严青青,张巨松,李春艳,窦海涛
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Compensation Effect of Nitrogen Fertilizer on Photosynthetic Characteristics and Yield during Cotton Flowering Boll-setting Stage under Non-sufficient Drip Irrigation
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Hong-Liang SHI,Qing-Qing YAN,Ju-Song ZHANG,Chun-Yan LI,Hai-Tao DOU
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表7 棉花产量构成因素及灌溉水生产力的比较
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Table 7 Comparison of cotton yield components and drip irrigation water productivity
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年份
Year | 灌溉量
Drip irrigation amount | 氮肥处理
N treatment | 单株结铃数
BN | 单铃重
BW (g) | 籽棉产量
SCY (kg hm-2) | 灌溉水生产力
IWP (kg m-3) | 籽棉增产率
SCYR (%) | | 2015 | 2800 m3 hm-2 | N0 | 3.8 c | 5.2 b | 4147.4 c | 1.5 c | | | | N150 | 4.4 b | 6.1 a | 4796.1 b | 1.7 b | 13.4 c | | | N300 | 5.3 a | 6.2 a | 5797.5 a | 2.1 a | 28.2 a | | | N450 | 5.1 a | 6.2 a | 5543.3 a | 2.0 a | 18.8 abc | | 3800 m3 hm-2 | N0 | 4.0 c | 5.3 b | 4321.1 c | 1.1 d | | | | N150 | 4.5 b | 6.0 a | 4847.5 b | 1.3 d | 10.7 c | | | N300 | 5.4 a | 6.2 a | 5836.9 a | 1.5 c | 25.9 a | | | N450 | 5.1 a | 6.2 a | 5618.3 a | 1.5 c | 22.8 ab | | 2016 | 2800 m3 hm-2 | N0 | 4.8 d | 5.0 d | 3808.4 d | 1.4 c | | | | N150 | 5.3 bc | 5.3 c | 4479.2 c | 1.6 b | 14.8 c | | | N300 | 6.7 a | 5.9 ab | 6337.9 ab | 2.3 s | 39.8 a | | | N450 | 6.7 a | 5.7 b | 6018.3 b | 2.2 a | 36.6 ab | | 3800 m3 hm-2 | N0 | 5.0 cd | 5.0 d | 4041.9 d | 1.1 e | | | | N150 | 5.3 b | 5.4 c | 4629.7 c | 1.2 d | 12.6 c | | | N300 | 7.0 a | 5.9 a | 6464.3 a | 1.7 b | 37.4 ab | | | N450 | 6.7 a | 5.7 b | 6053.6 b | 1.6 b | 33.2 b |
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