| 摘要: |
| 采用土柱盆栽试验，研究不同水分条件下施磷位置对冬小麦生长发育，养分吸收及磷肥利用的影响，试验结果表明，在正常供水情况下，表层施磷和全层施磷处理冬小麦地上部干物质根干重，Ｎ，Ｐ，Ｋ吸收量及磷肥利用率均显著高于底层施磷处理。随施磷量的增加，冬小麦地上部干物质啬而磷肥每时每刻经降低。干旱胁迫高施磷量条件下，全层施磷处理冬小麦地上部干物重，Ｎ，Ｐ，Ｋ吸收量及磷肥利用率最高，而低施磷量时则表层施磷处理最高， |
| 关键词: 施磷位置 土壤水分 冬小麦 磷营养 |
| DOI： |
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| 基金项目:国家自然科学基金 |
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| Effects of Placement of P_2O_5, under Different Soil Moisture on Growth and Nutrients Uptake of Wheat |
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| Abstract: |
| In order to investigate the effects of placement of P fertilizer on nutrients uptake of wheat under different soil moisture, a pot experiment was conducted. The results showed that when soil was supplied with sufficient water, shoot and root dry weight and N,P,K uptake of wheat were significantly higher if P fertilization be placed at upper and total soil layer than P fertilization be placed at lower layer. When soil suffered water stress, wheat have the highest shoot and root dry weight and N,P,K uptake as P fertilization at total soil layer under high level of P fertilizer application. under this condition, apparent recovery of phosphorous was the highest too. But the differences within various treatment were not so apparent as that of under nomal level of soil water. Under same doze of P2O5, application, the efficiency was obvionsly higher than that under drought stress. |
| Key words: phosphorus fertilizer placement,soil moisture,wheat,nutrient uptake |
