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灌淤土是引黄灌区种植春麦的主要土壤类型。灌淤土的肥力水平,特别是水肥条件与土壤物理性状,对春麦产量的高低影响极大。土壤中有效水分、养分及土壤物理性状,在春麦生育期中变动较大;而春麦在不同生育期中所需的水分、养分和通透性也各不相同。如何协调春麦的需求与土壤供肥之间的矛盾,满足春麦全生育期的需要,是夺取春麦高产的重要问题之一。故研究高产灌淤土中水分、养分及土壤物理性状在春麦全生育期的变化与春麦产量的关系,对我区夺取春麦高产具有一定的理论与实践意义。
Irrigation silt is the main type of soil for planting spring wheat in the Yellow River irrigated area. The fertility levels of irrigated silts, especially the water and fertilizer conditions and soil physical properties, have a great impact on the yield of spring wheat. Effective soil moisture, nutrients and soil physical properties changed greatly during the growth period of spring wheat, while the moisture, nutrient and permeability needed by spring wheat at different growth stages were also different. How to coordinate the contradiction between the demand of spring wheat and the supply of soil to meet the needs of the whole growth period of spring wheat is one of the important issues to seize the high yield of spring wheat. Therefore, it is of theoretical and practical significance to study the relationship between the changes of water, nutrients and soil physical properties in high yield irrigated silts soil during the whole growth period of spring wheat and the yield of spring wheat.