春小麦液膜覆盖栽培效应研究

液膜覆盖栽培技术在甘肃省沿黄新灌区春小麦栽培中试验应用，其结果表明，新型土壤结构调理剂－土面液膜喷洒在地面所形成的黑色胶结膜，在小麦出苗至拔节期能有效地起到增温保墒作用，0～20cm耕层土较露地栽培提高0．7～1．2℃，0～40cm土壤含水量提高46．8～158．2g/kg。抽穗后无明显作用，对土壤不产生机械性污染，可使小麦生育期进程提前2～3d，增产率达10％左右。

A STUDY ON THE EFFECT OF CULTIVATION OF SPRING WHEAT MULCHED UNDE R LIQUID FILM

A study of spring wheat cultivation carried out in newlyirrigated regions along the Yellow River indicated that the black liquid film which was formed on soil surface can improve the soil temperature and the moisture contents effectively from the emergence of seedlings to the elongation stage of spring wheat. As compared with the control cultrued in the open, the soil temperature was raised by 0.7～1.2℃ in the tillage layer between 0～20 cm, and the soil moisture content was enhanced by 46.8～158.0 g/kg in the layer of 0～40 cm. After the early stage, the effect is insignificant ,but there is no mechan ical pollution to the soil. The growth stage was advanced 2～3 days by using the technique of liquid film, and the yields of wheat increased by about 10%.