增密减氮对棉花干物质和氮素积累分配及产量的影响
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王士红,杨中旭,史加亮,李海涛,宋宪亮,孙学振
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Effects of increasing planting density and decreasing nitrogen rate on dry matter, nitrogen accumulation and distribution, and yield of cotton
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Shi-Hong WANG,Zhong-Xu YANG,Jia-Liang SHI,Hai-Tao LI,Xian-Liang SONG,Xue-Zhen SUN
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表5 增密减氮对棉花产量及其构成因素的影响
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Table 5 Effects of increased planting density with reduced nitrogen fertilizer application on cotton yield and yield components
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密度
Plant density
(×104 plants hm-2) | 施氮量
N rate
(kg hm-2) | 铃数
Boll density
(×104 bolls hm-2) | 铃重
Boll weight
(g boll-1) | 衣分
Lint percentage
(%) | 籽棉实产
Seed cotton yield
(kg hm-2) | 皮棉实产
Lint yield
(kg hm-2) | | 2016 | | | | | | | | D5.25 | N0 | 64.6 d | 5.3 cd | 41.9 a | 3283.7 e | 1375.1 e | | N105 | 71.8 c | 5.6 b | 41.7 a | 3584.3 d | 1493.1 d | | N210 | 72.4 c | 5.8 a | 41.6 a | 3998.0 bc | 1662.2 bc | | N315 | 71.7 c | 6.0 a | 41.8 a | 4234.3 a | 1769.7 a | | N420 | 71.6 c | 5.4 bc | 41.7 a | 3964.7 c | 1653.9 bc | | D6.75 | N0 | 66.9 d | 5.6 b | 41.5 a | 3425.0 e | 1421.1 e | | N105 | 76.3 b | 5.6 b | 41.5 a | 4126.0 ab | 1713.0 ab | | N210 | 78.0 b | 5.9 a | 41.5 a | 4208.3 a | 1745.3 a | | N315 | 76.5 b | 5.6 b | 41.7 a | 3898.0 c | 1626.6 c | | D6.75 | N420 | 76.5 b | 5.6 b | 41.4 a | 3714.7 d | 1538.5 d | | D8.25 | N0 | 72.5 c | 5.2 d | 41.8 a | 3373.0 e | 1409.3 e | | N105 | 82.0 a | 5.2 d | 41.5 a | 3591.7 d | 1490.3 d | | N210 | 84.7 a | 5.3 cd | 41.7 a | 3659.3 d | 1526.8 d | | N315 | 84.2 a | 5.6 b | 41.8 a | 3581.3 d | 1497.7 d | | N420 | 83.3 a | 5.3 cd | 41.8 a | 3609.3 d | 1506.9 d | | 2017 | | | | | | | | D5.25 | N0 | 69.0 f | 5.4 c | 41.2 a | 3391.3 e | 1396.3 e | | N105 | 76.0 d | 5.7 ab | 41.0 a | 3859.3 d | 1583.7 d | | N210 | 75.8 d | 5.7 ab | 41.0 a | 4157.7 b | 1704.7 b | | N315 | 76.7 d | 5.8 a | 41.1 a | 4429.3 a | 1818.3 a | | N420 | 76.3 d | 5.6 ab | 41.5 a | 4096.3 b | 1699.0 b | | D6.75 | N0 | 69.9 f | 5.5 c | 41.3 a | 3471.0 e | 1433.0 e | | N105 | 80.2 c | 5.7 ab | 41.4 a | 4117.7 b | 1705.7 b | | N210 | 81.5 c | 5.8 a | 41.4 a | 4415.7 a | 1826.3 a | | N315 | 80.9 c | 5.6 b | 41.2 a | 4017.0 bc | 1653.3 bc | | N420 | 81.8 c | 5.7 ab | 41.2 a | 3896.0 cd | 1605.7 cd | | D8.25 | N0 | 73.3 e | 5.3 c | 41.0 a | 3519.3 e | 1444.3 e | | N105 | 85.3 ab | 5.4 c | 41.5 a | 3770.7 d | 1564.0 d | | N210 | 85.9 ab | 5.4 c | 41.2 a | 3898.3 cd | 1607.7 cd | | N315 | 87.6 a | 5.4 c | 41.1 a | 3901.0 cd | 1605.0 cd | | N420 | 85.1 b | 5.4 c | 41.4 a | 3778.3 d | 1564.3 d | | 变异来源 Source of variation | | | | | | | 年份Year | ** | ns | ns | ** | ** | | 种植密度Density (D) | ** | ** | ns | ** | ** | | 施氮量Nitrogen (N) | ** | ** | ns | ** | ** | | 种植密度×施氮量 D×N | ** | ** | ns | ** | ** |
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