通过田间试验研究渭北旱原不同施肥处理(不施肥;40 kg P2O5/hm2;豆科绿肥专用肥30 kg/hm2)对夏闲期豆科绿肥生长和后茬小麦生长的效果,探讨了夏季豆科绿肥翻压方式(提前翻压、提前覆盖,播前翻压和不种绿肥即夏季休闲)对后茬冬小麦产量及水分利用的影响。研究表明:与不施肥处理相比,豆科绿肥专用肥显著提高绿肥盛花期地上部生物量,但对根系生长没有明显作用;施用磷肥则更有利于绿肥根系生物量的提高;施用绿肥专用肥和磷肥处理的后茬小麦产量较高,特别是绿肥提前翻压时。绿肥提前翻压时冬小麦分蘖数较高、春季总茎数较高、单位面积穗数较高,产量显著高于绿肥提前覆盖、播前翻压和不种绿肥处理,水分生产效率显著高于不种绿肥处理。从绿肥翻压、小麦播前直至小麦拔节期,绿肥翻压方式的3个处理土壤0~200 cm剖面水分含量与休闲处理始终有明显差异。提前翻压处理与提前覆盖、播前翻压处理的差异主要在40 cm以上土层。 Field experiments were conducted to study the effects of different fertilization treatments (no fertilization; 40 kg P2O5 / hm2; special fertilizer for legume green manure 30 kg / hm2) on the growth of leguminous green manure and the following wheat growth in the Weibei dryland in summer. Effects of TFP Greenhouse Fertilizer on Yield and Water Use Efficiency of Winter Wheat in Following Cropping Areas (Early Tension, Early Covering, Pre-Sowing and Summer Greening). The results showed that compared with non-fertilizing treatment, the special legume green manure fertilizer significantly increased aboveground biomass of green manure in full flowering stage, but had no obvious effect on root growth. The application of phosphate fertilizer was more beneficial to the increase of root biomass of green manure; And phosphorus fertilizer after the crop a higher yield, especially when green manure in advance pressure. When the green manure was overturned in advance, the tiller number of winter wheat was higher, the total number of stems was higher in spring, the ear number per unit area was higher, the yield was significantly higher than that of green manure in advance, and the water production efficiency was significantly higher than before Green fertilizer treatment. From the green manure pressure, wheat sowing until wheat jointing stage, green manure overpressure of the three treatment soil 0 ~ 200 cm section of the moisture content and leisure treatment has always been significantly different. Advance pressure treatment and early coverage, before sowing pressure processing differences mainly in the soil above 40 cm.