Study On Effect Of Soil Moisture Caused By Different Cultivation In Crops Seeding Stage

Drought often happens when the time is suitable for the spring sowing in Northern China. In order to maximize the utilization of limited soil moisture and mitigate or even eliminate the drought adversity stress that crops may suffer during its growth period, exploring scientific and rational and water-saving tillage methods have become the key to solve the problem. The experimental field is located in Yangjia village, Shanxi Taigu. This trial selects maize as planting crops and uses completely randomized experiment as experimental design. Experimental data reduction and analyses were accomplished by exerting mathematical statistics and analysis software. The contents of this paper including the variations of soil moisture and soil dry bulk density and soil water storage caused by different tillage or seeding or mulching methods in crops seeding stage, and these arguments should become theoretical foundation to explore or even establish scientific and rational and water-saving tillage methods. The main conclusions of this article are as follows:The variations of soil moisture caused by experimental factors (tillage methods, seeding methods, mulch methods) in 0-20cm profile are relative significant, and the significances sort out, according to the order from high to low, as mulch methods, tillage methods, seeding methods. Then the variations under 20cm profile are non-significant. The variations of soil moisture caused by seeding methods are weak and non-durable. However, the variations of soil moisture caused by mulch methods are the most enduring, and the variations have little change over time. Besides that, mulching can dramatically drop the coefficient of variation of soil moisture. Soil compaction can increase the soil dry bulk density effectively, but this effect weakened languishingly and disappeared eventually.