| Responses of Nitrogen Uptake and Yield of Winter Wheat to Nonuniformity of Sprinkler Fertigation |
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| 作者姓名： | LI Jiu-sheng LI Bei SU Mei-shuang RAO Min-jie |
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| 作者单位： | [1]China Institute of Water Resources and Hydropower Research, Beijing 100044, P.R.China [2]College of Hydraulic and Civil Engineering, China Agricultural University, Betjing 100085, P.R. China [3]Agro-Environmental and Sustainable Development Institute, Chinese Academy of Agricultural Sciences, Beijing IO0081,P.R. China |
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| 摘 要： | Field experiments were conducted to investigate the effects of nonuniformity of sprinkler fertigation and the amount of fertilizers applied through fertigation on nitrogen uptake and crop yield during two growing seasons of winter wheat in 2002-2003 and 2003-2004 at an experimental station in Beijing. In the experiments, the seasonal averaged Christiansen irrigation uniformity coefficient （CU） varied from 72% to 84%. Except for the fertilizer applied before planting, fertilizer was applied with the sprinkler irrigation system with a seasonal averaged CU for fertigation varied from 71% to 85%. Three levels of fertilizer applied varying from 0 to 180 kg N ha^-1 were used in the experiments. The experimental results demonstrated that sprinkler fertigation uniformity had insignificant effects on nitrogen uptake and crop yield for the uniformity range tested. Also, the influence of fertilizer applied through sprinkler fertigation on crop yield was minor, while the total nitrogen content for stem and nitrogen uptake increased with increasing fertilizer applied.
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| 关 键 词： | 冬小麦 氮含量 地下水 洒水装置 水肥管理 |
Responses of Nitrogen Uptake and Yield of Winter Wheat to Nonuniformity of Sprinkler Fertigation |
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| LI Jiu-sheng LI Bei SU Mei-shuang RAO Min-jie.Responses of Nitrogen Uptake and Yield of Winter Wheat to Nonuniformity of Sprinkler Fertigation[J].Agricultural Sciences in China,2005,4(9):693-699. |
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| Authors: | LI Jiu-sheng LI Bei SU Mei-shuang RAO Min-jie |
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| Abstract: | Field experiments were conducted to investigate the effects of nonuniformity of sprinkler fertigation and the amount of fertilizers applied through fertigation on nitrogen uptake and crop yield during two growing seasons of winter wheat in 2002-2003 and 2003-2004 at an experimental station in Beijing. In the experiments, the seasonal averaged Christiansen irrigation uniformity coefficient (CU) varied from 72% to 84%. Except for the fertilizer applied before planting, fertilizer was applied with the sprinkler irrigation system with a seasonal averaged CU for fertigation varied from 71% to 85%. Three levels of fertilizer applied varying from 0 to 180 kg N ha-1 were used in the experiments. The experimental results demonstrated that sprinkler fertigation uniformity had insignificant effects on nitrogen uptake and crop yield for the uniformity range tested. Also, the influence of fertilizer applied through sprinkler fertigation on crop yield was minor, while the total nitrogen content for stem and nitrogen uptake increased with increasing fertilizer applied. |
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| Keywords: | Sprinkler irrigation Fertigation Uniformity Winter wheat Nitrogen uptake Yield |
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