Focused on the rainfall characteristics and the reality of agricultural production in the loess tableland , and based on previous results, new patterns for dryland winter wheat production, in which the emphasis was pu...Focused on the rainfall characteristics and the reality of agricultural production in the loess tableland , and based on previous results, new patterns for dryland winter wheat production, in which the emphasis was put on the film mulch with obvious water-preserving advantage, were designed to make effective use of rainfall. The results showed that the technique of the double mulch of film plus straw in summer fallow period can collect the rainfall in this period to the utmost extent and over 73.2% of it can be stored in the soil, which is 108. 4 mm more than that of conventional tillage. Furthermore, it can not only preserve water stored in soil in summer fallow, but also collect the rainfall in the growth period as much as possible by using the technique of making ridges plus film mulching and furrow sowing. So the patterns, which can greatly increase both the soil moisture and wheat yield, are the best choice for making full utilization of the rainfall and achieving a high and stable yield in the dryland wheat production of the loess tableland.展开更多
基金This study was supported by the National High-Tech Research and Development Plan(the“863”Plan of China,2002AA2Z4021)the National Natural Science Foundation of China(30070439)the National Key Project for the"Ninth Five Year"Plan,China(96-004-05-08).
文摘Focused on the rainfall characteristics and the reality of agricultural production in the loess tableland , and based on previous results, new patterns for dryland winter wheat production, in which the emphasis was put on the film mulch with obvious water-preserving advantage, were designed to make effective use of rainfall. The results showed that the technique of the double mulch of film plus straw in summer fallow period can collect the rainfall in this period to the utmost extent and over 73.2% of it can be stored in the soil, which is 108. 4 mm more than that of conventional tillage. Furthermore, it can not only preserve water stored in soil in summer fallow, but also collect the rainfall in the growth period as much as possible by using the technique of making ridges plus film mulching and furrow sowing. So the patterns, which can greatly increase both the soil moisture and wheat yield, are the best choice for making full utilization of the rainfall and achieving a high and stable yield in the dryland wheat production of the loess tableland.
