Zhang Suiqi,Shan Lun.Effects of Nitrogen Nutrition on the Drought Adaptation and Water Use of Spring Wheat[J].Research of Soil and Water Conservation,1995,2(01):31-35,55.
氮素营养对春小麦抗旱适应性及水分利用的影响
- Title:
- Effects of Nitrogen Nutrition on the Drought Adaptation and Water Use of Spring Wheat
- Keywords:
- spring wheat; water stress; nitrogen nuitrition; drought resistance
- 摘要:
- 本文研究了氮素营养和水分胁迫对春小麦水分状况、气孔导度、渗透调节和净光合速率的影响，并对不同氮素和水分水平下的叶面积、耗水量、根系生长、根冠比、水分利用效率（WVE）和产量变异进行了分析。认为，不同氮素水平下，春小麦对于旱的适应途径不同，施用氮肥在一定程度上可以改变春小麦对干旱的适应方式，但未明显提高作物自身的生理耐旱性。施氮增加产量和提高WVE的原因主要在于氮素满足了作物的生长所需，促进了根系的发育和保持了水分的有效利用。
- Abstract:
- The effects of nitrogen nutrition and water stress on water status. stomatal conduc tance, osmotic adjustment and net photosythesis rate of spring wheat were studied. The variance of leaf area, root growth. root/shoot ratio.water use. water use efficiency and yield were analysed under various nitrogen nutrition and water stress levels. Results indicated that the adaptive charac-teristics of spring wheat to drought were different under various nitrogen nutrition levels.Applica-tion of nitrogen fertilizer may change adaption way of spring wheat to drought in some extent. This was beneifical to resist drought, but phsiological drought tolerance of crop was not significantly improved.The increasing of yield and raising of water use efficiency with nitrogen fertilizer were mainly because the need of nutrient was satisfied when the plant was growing.and the root development was promoted.the beneifical use of water were maintained.
参考文献/References:
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备注/Memo
收稿日期:1994-6-30
基金项目:国家自然科学基金