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渭北旱塬属于雨养农业区 ,干旱已构成该区现阶段冬小麦再上新台阶的第一限制因子。因此蓄住自然降水 ,对解决该区干旱问题十分重要。据此 ,我们在合阳甘井经过几年麦草覆盖保墒试验 ,提出了“留茬全程覆盖技术”(以下简称全程覆盖 )。该技术使旱区小麦产量由中产 (3150 kg/hm2 )提高到高产 (6 0 0 0 kg/hm2 )水平 ;最大限度地提高了自然降水的保蓄率 ;肥力进一步提高 ;改善了小麦根系微环境和土壤生态状况。
Weibei dryland belongs to rainfed farming area, the drought has formed the first limit factor of winter wheat in this area to a new level. Therefore, it is very important to solve the problem of drought in this area by accumulating natural precipitation. Accordingly, we in Gan Yang after several years wheat straw coverage soil moisture test, put forward the “stubble full coverage technology” (hereinafter referred to as full coverage). The technology increased the yield of wheat in arid area from middle level (3150 kg / hm2) to high level (6000 kg / hm2), maximized the saving rate of natural precipitation, increased fertility and improved root microelement Environment and soil ecology.