水磷互作对黑垆土春小麦生长及产量的影响

Research on interaction of water and phosphorus on growth and yield of spring wheat in loessial soil

在温室条件下进行了黑垆土水磷互作对春小麦生长及产量影响的研究。结果表明,水分和磷素对春小麦苗期与抽穗期内株高和叶面积皆有一定影响,但交互作用的表现不同;适宜的水分与磷素配合既满足了春小麦物质生产过程中对水分和营养元素的需求,又促进了春小麦生长发育,提高了生物产量、经济产量及水分生产效率,从而可以达到以水促磷和以磷促水的目的;而缺水高磷组合或高水低磷组合均不利于春小麦生长发育,其产量与水分生产效率也较低。

Interactions of water and phosphorus on growth and yield of spring wheat were conducted by pot experiment with loessial soil in controllable greenhouse. The results indicated that water, phosphorus, and their interactions were studied about the different effects on plant height and leaf area in seeding stage and heading stage. Suitable water and phosphorus combination could satisfy the requirements of water and phosphorus nutrition in order to enhance the crop＇s growth, and increase its biomass, yield and in turn promote WUE of spring wheat. It had achieved that water were promoted by phosphorus and phosphorus were promoted by water. But the combination of poor water and high phosphorus or the combination of high water and poor phosphorus could not all propitious to the growth of wheat, WUE and yield. The effects of suitable water and phosphorus were the most important factor for increasing the wheat yield.