位于美国俄勒冈(Oregcu)州的Columbia盆地,年降水量270毫米左右。冬小麦于9月下旬播种,播种时落种层土壤含水量仅7～9％,成苗常或问题。为揭示在干旱土壤中喷水播种对小麦成苗、生长和籽粒产量的影响,1979～1982年俄勒冈州大学的Fariborz等人在该州的Sherman试验站进行了播种时喷少量水的试验。试验期间年降水量 Located in Columbia Basin, Oregon, USA, annual precipitation is about 270 mm. Winter wheat sowing in late September, sowing seed layer soil moisture content of only 7 to 9%, often the problem of seedlings. In order to reveal the effect of watering in arid soils on seedling establishment, growth and grain yield of wheat, Fariborz et al. From 1979 to 1982 conducted a small amount of water injection at the Sherman Station in the state of Sowing. Annual precipitation during the experiment