Abstract:

Taihang Piedmont is the major grain producing areas of Hebei province, where the agricultural water is very short and mainly by excessive extraction of groundwater to maintain agricultural production. How to keep a certain basis of food production and reduce a large number of irrigation water is the main problems of water saving agriculture development in the future. Shan Lun indicated that semi-dryland farming could be developed in the Huanghuaihai Region to solve this questions. Semi-dryland farming is a new type of water saving agriculture, which is based on the dry land farming techniques, making full use of the precipitation and offering some supplemental irrigation. It is composed of rainfed, dry farming and supplemental irrigation. The main point is combining the dry land farming techniques and the water saving techniques and making full use of the precipitation. We discuss the feasibility of implementing semi-dryland faming in the Taihang Piedmont on the three aspects. And we find that in the winter wheat and summer maize growing areas of Taihang Piedmont, where the rainfall is about 400mm, some supplementary irrigation could basically meet the crop water requirement and keep the normal grain yields and a much higher WUE, which is based on the properties of crop drought resistance and decreasing the invalid evaporation. It is feasible to reduce the agriculture irrigation water in the piedmont region of Taihang Mountain in theory and in practice, which is based on the full utilization of rainfall and supplement irrigation.