| 陇东旱塬地区冬小麦水肥效应耦合模拟研究 |
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| 引用本文： | 武天云,王生录,邓娟珍,金绍龄,崔明九,张兴高.陇东旱塬地区冬小麦水肥效应耦合模拟研究[J].西北农业学报,1995,4(2):69-72. |
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| 作者姓名： | 武天云 王生录 邓娟珍 金绍龄 崔明九 张兴高 |
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| 作者单位： | 甘肃省农科院土肥所, 兰州 730070;甘肃省农科院土肥所, 兰州 730070;甘肃省农科院土肥所, 兰州 730070;甘肃省农科院土肥所, 兰州 730070;甘肃省农科院旱农所, 兰州 730070;甘肃省农科院旱农所, 兰州 730070 |
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| 摘 要： | 采用无底铁框作微区,选择冬小麦生育期降水量(P)和施氦量(N)进行水肥效应模拟研究,得出冬小麦产量(Y)与降水量和施氮量的关系为Y=2505.6713+5.3422N-0.0251N2+24.3482P-0.0325P2+0.0074NP.水肥耦合方程为Nc=73.4805+0.2325P.当降水量由160mm增至400mm时,最高产量由5993.93kg/hm2提高到7710.39kg/hm2,最高产量施氮量Nmax由126.51kg/hm2增至165.48kg/hm2,经济施氮量Nopt由78.60kg/hm2增至107.12kg/hm2,Nc值则由110.55kg/hm2增至166.50kg/hm2.在降水量小于400mm时有Nopt < Nc < Nmax成立,且Nopt与Nc差值较大,说明旱塬地区单以经济施氮量为施肥标准不能充分发挥降水的增产潜力.提出了以上壤水肥宏观调控的原则,编制出陇东旱塬地区冬小麦合理施肥的方案.
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| 关 键 词： | 陇龙旱塬区 冬小麦 水肥耦合 氮肥 |
| 收稿时间： | 1994/4/18 0:00:00 |
| 修稿时间： | 1994/12/22 0:00:00 |
SIMULATION OF EFFECTS OF NITROGEN APPLYING IN DIFFERENT RAINFALL ON DRYLAND WINTER WHEAT IN LONGDONG |
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| Wu Tianyun,Wang Shenglu,Deng Juanzhen,Jin Shaoling,Cui Mingjiu and Zhang Xinggao.SIMULATION OF EFFECTS OF NITROGEN APPLYING IN DIFFERENT RAINFALL ON DRYLAND WINTER WHEAT IN LONGDONG[J].Acta Agriculturae Boreali-occidentalis Sinica,1995,4(2):69-72. |
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| Authors: | Wu Tianyun Wang Shenglu Deng Juanzhen Jin Shaoling Cui Mingjiu and Zhang Xinggao |
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| Institution: | Soil science and Fertilizer Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070;Soil science and Fertilizer Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070;Soil science and Fertilizer Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070;Soil science and Fertilizer Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070 |
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| Abstract: | The precipitation in winter wheat growth season and nitrogen applying were studied 50×50×100 cm isolated soil columun was used in experiment.The relation of yield with precipitation and vitrogen rates could been fitted by Y=2505.6713+5.3422N-0.0251N2+24.3482P-0.0325P2+0.0074NP.If ∂Y/∂N=∂Y/∂P,the formula that nitrogen rates coincided with precipitation in winter wheat growth period was Nc=73.4805+0.2325P.When precipitation increased from 160mm to 900 mm,the maximum yield would increase from 5993.93 kg/hm2,to 7710.39 kg/hm2,the maximum nitrogen rate would increase from 126.51 kg/hm2 to 165.48 kg/hm2,the optimum nitrogen rate would increase from 78.61 kg/hm2 to 107.12 kg/hm2.Nopt < Nc < Nmax was trun on P<400 mm condition.Winter wheat fertilizer application consultsystem in Longdong area was programed as a software with simulating results and other experiment result. |
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| Keywords: | Dryland Longdong area Winter wheat Fertilizer Rainfall |
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