Effect of Mulching of Water Conservation for Dryland Winter Wheat in the Loess Tableland

According to the rainfall characteristics and agricultural production reality in the loess tableland, new patterns for winter wheat to make full use of rainfall based on the previous researches were designed. The results show that the technique of film mulching plus straw mulching in summer fallow period collected almost of the rainfall in this period and stored over 73.2% in soil, which is 108.4 mm more than that by conventional tillage. On the basis of storing more water in summer fallow period, adopting of the technique of making ridges plus film mulching and seeding in furrows in sowing time, rainfall also can be kept in soil as much as possible during wheat growth, which then increased the soil moisture and further increased yield of wheat.