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2 不同种植密度和施氮量棉花氮素累积动态特征值
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Table 2 Eigen values of cotton nitrogen accumulation dynamics under different nitrogen fertilizer rate and planting density treatments
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处理
Treatment | 2016 | | 2017 | Ym
(kg hm-2) | t1
(d) | t2
(d) | tm
(d) | Vm
(kg hm-2 d-1) | T
(d) | Ym
(kg hm-2) | t1
(d) | t2
(d) | tm
(d) | Vm
(kg hm-2 d-1) | T
(d) | | 种植密度Plant density (×104 plants·hm-2) | | D5.25 | 245.7 | 71.7 | 119.5 | 95.6 | 3.4 | 47.8 | | 223.4 | 62.3 | 105.5 | 83.9 | 3.4 | 43.2 | | D6.75 | 256.9 | 69.0 | 116.5 | 92.8 | 3.6 | 47.5 | | 237.2 | 60.1 | 101.7 | 80.9 | 3.8 | 41.6 | | D8.25 | 260.0 | 64.7 | 113.7 | 89.2 | 3.5 | 49.0 | | 235.7 | 58.1 | 99.8 | 79.0 | 3.7 | 41.7 | | 施氮量N rate (kg hm-2) | | | | | | | | | | | | | | N0 | 193.3 | 65.1 | 108.1 | 86.6 | 3.0 | 42.9 | | 174.3 | 56.2 | 92.1 | 74.1 | 3.2 | 35.9 | | N105 | 245.6 | 69.2 | 118.9 | 94.1 | 3.3 | 49.7 | | 218.5 | 59.2 | 102.5 | 80.9 | 3.3 | 43.2 | | N210 | 271.0 | 69.5 | 121.1 | 95.3 | 3.5 | 51.6 | | 246.7 | 60.9 | 104.8 | 82.8 | 3.7 | 43.8 | | N315 | 281.1 | 69.4 | 117.6 | 93.5 | 3.9 | 48.2 | | 255.1 | 61.7 | 104.2 | 82.9 | 4.0 | 42.5 | | N420 | 280.1 | 69.0 | 117.1 | 93.1 | 3.9 | 48.1 | | 265.9 | 62.8 | 108.1 | 85.5 | 3.9 | 45.4 | | 种植密度×施氮量Plant density×N rate | | D5.25×N0 | 192.2 | 69.4 | 112.4 | 90.9 | 3.0 | 43.0 | | 171.7 | 58.8 | 95.2 | 77.0 | 3.1 | 36.4 | | D5.25×N105 | 231.4 | 72.1 | 118.3 | 95.2 | 3.3 | 46.2 | | 214.3 | 61.6 | 106.7 | 84.2 | 3.1 | 45.1 | | D5.25×N210 | 258.0 | 72.0 | 122.3 | 97.2 | 3.4 | 50.3 | | 239.8 | 63.0 | 107.2 | 85.1 | 3.6 | 44.2 | | D5.25×N315 | 274.8 | 72.4 | 122.6 | 97.5 | 3.6 | 50.2 | | 250.6 | 64.2 | 110.3 | 87.2 | 3.6 | 46.1 | | D5.25×N420 | 271.9 | 72.4 | 121.8 | 97.1 | 3.6 | 49.4 | | 240.6 | 63.9 | 108.1 | 86.0 | 3.6 | 44.2 | | D6.75×N0 | 196.5 | 64.7 | 109.2 | 87.0 | 2.9 | 44.5 | | 177.5 | 56.0 | 92.3 | 74.2 | 3.2 | 36.4 | | D6.75×N105 | 254.7 | 70.3 | 121.5 | 95.9 | 3.3 | 51.2 | | 223.0 | 59.5 | 101.6 | 80.6 | 3.5 | 42.0 | | D6.75×N210 | 279.1 | 70.9 | 122.7 | 96.8 | 3.6 | 51.8 | | 258.2 | 61.2 | 104.9 | 83.1 | 3.9 | 43.7 | | D6.75×N315 | 284.0 | 70.1 | 115.8 | 92.9 | 4.1 | 45.7 | | 257.5 | 61.6 | 101.9 | 81.7 | 4.2 | 40.3 | | D6.75×N420 | 270.2 | 69.1 | 113.4 | 91.3 | 4.0 | 44.3 | | 269.8 | 62.0 | 107.7 | 84.8 | 3.9 | 45.6 | | D8.25×N0 | 191.1 | 61.3 | 102.6 | 81.9 | 3.1 | 41.3 | | 173.6 | 53.7 | 88.8 | 71.3 | 3.3 | 35.1 | | D8.25×N105 | 250.6 | 65.3 | 116.9 | 91.1 | 3.3 | 51.6 | | 218.3 | 56.6 | 99.1 | 77.8 | 3.4 | 42.5 | | D8.25×N210 | 275.9 | 65.5 | 118.2 | 91.9 | 3.5 | 52.7 | | 242.2 | 58.5 | 102.1 | 80.3 | 3.7 | 43.6 | | D8.25×N315 | 284.3 | 65.7 | 114.5 | 90.1 | 3.9 | 48.8 | | 257.1 | 59.3 | 100.3 | 79.8 | 4.1 | 41.0 | | D8.25×N420 | 298.1 | 65.6 | 116.2 | 90.9 | 3.9 | 50.6 | | 287.4 | 62.4 | 108.7 | 85.6 | 4.1 | 46.4 | | 平均Average | 254.2 | 68.5 | 116.6 | 92.5 | 3.5 | 48.1 | | 232.1 | 60.2 | 102.3 | 81.2 | 3.6 | 42.2 |
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