| 魏新平.灌水量对追肥效果影响的试验研究[J].水利学报,2003,34(9):0123-0128 |
| 灌水量对追肥效果影响的试验研究 |
| Experimental study on influence of duty on top fertilizer effect |
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| DOI： |
| 中文关键词: 灌溉 追肥 KNO3 溶质运移 作物根系 |
| 英文关键词: irrigation KNO3 soil solute transport plant root |
| 基金项目: |
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| 摘要点击次数: 1712 |
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| 中文摘要: |
| 以植物生理学和土壤溶质运移理论为基础，依据室内试验和野外大型土柱实验资料，分析了甘肃秦王川灌区春小麦根系生长规律。确定了描述土壤溶质运移方程中的关键参数，并计算了试验区春小麦追肥并灌水后农田土壤NO3-运移、分布规律，计算结果与试验资料吻合良好。用Michealis-Menton方程模拟了1m根区土层内春小麦灌溉入渗结束时刻的瞬态吸N量，初步提出了以作物对土壤养分吸收利用率最高为目标的灌水量确定方法。结果表明：灌水量对追肥后土壤养分运移有影响，灌水量对土壤中NO3-离子运移的影响大于对K+离子运移的影响。 |
| 英文摘要: |
| On the basis of plant physiology and theory for soil solute transport, the influence of duty on top fertilizer effect for spring wheat is studied. Experimental study is carried out in combination with model analysis. The method for determination of duty according to the maximum plant uptake ratio of soil nutriment is proposed. The best duty for spring wheat is recommended accordingly. |
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