| 关中灌区小麦、玉米轮作田磷肥施用定位研究 |
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| 引用本文： | 刘杏兰.关中灌区小麦、玉米轮作田磷肥施用定位研究[J].西北农业学报,1995,4(3):85-88. |
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| 作者姓名： | 刘杏兰 |
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| 作者单位： | 陕西省土壤肥料研究所, 杨陵712100 |
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| 摘 要： | １１年定位研究表明，在关中灌区土的小麦，玉米轮作制中，将磷肥施于小麦，每ｋｇＰ２Ｏ５平均增产１４．９ｋｇ，后作玉米平均增产７．３ｋｇ，磷肥利用率２５．６％，比等量磷肥施于玉米的增产效益高。施磷肥后，耕层土壤有效磷含量增多，耕层下土壤因得不到磷素补充，有效磷含量减少较多，年生产粮食１０．５～１２．０ｔ／ｈｍ＾２，年需要施磷肥（Ｐ２Ｏ５）１０５～１２０ｋｇ／ｈｍ＾２，可维持土壤磷素的平衡。
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| 关 键 词： | 关中地区 小麦 玉米 轮作 磷肥 定位研究 |
| 收稿时间： | 1994/2/3 0:00:00 |
| 修稿时间： | 1994/5/23 0:00:00 |
PHOSPHORUS FERTILIZER RECOMMENDATION FOR WHEAT-MAIZE RATATION SYSTEM IN GUAZHOMG IRRIGTIOM AREA |
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| Liu Xinglan.PHOSPHORUS FERTILIZER RECOMMENDATION FOR WHEAT-MAIZE RATATION SYSTEM IN GUAZHOMG IRRIGTIOM AREA[J].Acta Agriculturae Boreali-occidentalis Sinica,1995,4(3):85-88. |
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| Authors: | Liu Xinglan |
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| Institution: | Institute of Soil and Fertilizer Shaanxi, Yangling 712100 |
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| Abstract: | It was shown by the 11 years experiment that one kg P2O5 can increase 14.9 kg wheat and 7.1 kg maize in wheat-maize rotation system in Guanzhong irrigation area.The phosphorus utilization efficiency is as high as 25.6%.It is more efficient in this system than in maize only.The available phosphorus in cultivated soil layer is increased.But under this layer available phosphorus is more decreased because no phosphorus added.In order to keep the equilibriun of phosphorus in soil it will be applied 105~120 kg P2O5/hm2 to maintain a good further harvest. |
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| Keywords: | Wheat Maize Rotation Phosphorus Location test |
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