长期施用不同剂量氮肥对高粱产量、氮素利用特性和土壤硝态氮含量的影响
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王媛, 王劲松, 董二伟, 武爱莲, 焦晓燕
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Effects of long-term nitrogen fertilization with different levels on sorghum grain yield, nitrogen use characteristics and soil nitrate distribution
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WANG Yuan, WANG Jin-Song, DONG Er-Wei, WU Ai-Lian, JIAO Xiao-Yan
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表3 不同施氮水平下高粱产量和植株地上部氮素累积量
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Table 3 Sorghum yield and nitrogen accumulation of above-ground plant at different nitrogen application rates
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年份
Year | 处理
Treatment | 产量
Grain yield
(kg hm-2) | 千粒重
1000-grain weight
(g) | 穗粒数
Grain number
per ear | 氮素吸收量
N accumulation
(kg hm-2) | | 2015 | N0 | 8828.00±425.81 a | 23.58±0.82 a | 1954.49±84.55 a | 176.03±3.35 a | | N75 | 9474.50±223.62 b | 24.01±2.31 a | 1925.23±229.71 a | 225.93±7.43 b | | N150 | 9398.50±263.27 ab | 22.13±1.25 a | 2200.79±158.03 a | 227.53±9.59 b | | N225 | 9373.00±408.22 ab | 22.17±0.40 a | 2044.42±114.56 a | 220.93±13.63 b | | N300 | 9157.50±231.13 ab | 23.28±0.97 a | 1992.32±185.57 a | 250.97±9.57 c | | N450 | 9178.00±107.92 ab | 23.39±1.04 a | 2019.53±93.40 a | 264.37±5.75 c | | 2016 | N0 | 6558.45±867.17 a | 25.38±1.08 a | 1785.01±96.17 a | 126.20±23.91 a | | N75 | 8039.30±783.39 b | 26.67±0.95 ab | 2141.66±223.08 b | 195.45±38.84 b | | N150 | 8609.20±699.18 b | 27.81±0.44 b | 1969.83±118.01 ab | 191.70±1.08 b | | N225 | 8523.85±785.79 b | 27.08±0.45 ab | 2120.00±168.73 b | 191.70±17.16 b | | N300 | 7720.10±358.35 ab | 27.09±2.26 ab | 2133.19±203.92 b | 187.65±33.45 b | | N450 | 8016.70±636.33 b | 27.32±0.78 ab | 2005.44±40.11 ab | 193.65±6.94 b | | 2017 | N0 | 6049.05±302.83 a | 20.25±2.02 a | 1752.42±231.41 a | 100.90±8.71 a | | N75 | 7481.25±860.12 b | 18.76±1.45 a | 2594.47±251.06 b | 140.55±8.55 b | | N150 | 6815.10±352.25 ab | 19.04±3.58 a | 2360.97±460.97 b | 142.00±9.05 b | | N225 | 7014.95±300.14 ab | 20.64±1.70 a | 2277.21±312.13 ab | 145.35±1.73 bc | | N300 | 7099.55±756.17 ab | 18.45±0.39 a | 2298.74±200.92 ab | 150.50±9.80 bc | | N450 | 7131.00±773.23 ab | 19.65±2.82 a | 2218.02±282.58 ab | 163.95±18.09 c | | 2018 | N0 | 6431.75±264.32 a | 27.49±1.09 a | 2167.46±37.54 a | 87.25±6.78 a | | N75 | 7525.70±533.25 b | 26.09±1.32 a | 2818.92±312.25 b | 132.50±9.62 b | | N150 | 7550.20±628.92 b | 25.19±0.60 a | 2776.43±61.98 b | 145.30±7.60 b | | N225 | 7166.90±729.93 b | 26.01±2.01 a | 2682.47±71.18 b | 140.10±13.08 b | | N300 | 6803.75±840.38 ab | 26.93±2.51 a | 2598.97±396.42 b | 135.60±16.37 b | | N450 | 6829.75±442.84 ab | 26.74±3.72 a | 2641.43±263.05 b | 140.40±10.78 b | | 2019 | N0 | 7248.78±1112.36 a | 20.90±1.04 b | 1960.07±445.54 a | 97.10±17.91 a | | N75 | 7915.81±664.66 a | 19.47±1.63 ab | 2423.49±316.84 ab | 129.32±17.69 ab | | N150 | 7715.23±585.36 a | 18.33±1.10 a | 2545.77±126.49 b | 148.10±13.08 b | | N225 | 7466.09±750.31 a | 18.20±0.44 a | 2455.83±112.38 ab | 142.19±19.16 b | | N300 | 8358.97±872.92 a | 19.57±0.72 ab | 2593.18±350.69 b | 159.20±29.95 b | | N450 | 7485.30±746.40 a | 19.83±1.40 ab | 2336.11±224.37 ab | 149.83±20.74 b |
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