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以渭北旱塬小麦地的填方区、原状区和挖方区为研究对象,研究了小麦地不同修整区域深0～600cm范围内土壤水分的分布规律。结果表明,地下0～200cm土壤水分变化较快,在春季,该层土壤含水量挖方区>原状区>填方区;地下210～450cm处,同季节测定的不同修整区土壤水分差别不大,但该层秋季的土壤水分含量要比春季约高3至4个百分点;地下460cm以下受降水影响较小;在秋季,填方区土壤水分可以恢复到地下450cm。结论,对于旱塬无灌溉区,挖方区更有利于冬小麦的生长。
Taking the fill area, undisturbed area and excavated area of wheat land in Weibei dryland as the research object, the distribution of soil moisture in different depths from 0 to 600 cm in wheat was studied. The results showed that soil moisture in 0 ~ 200cm underground changed rapidly. In spring, the soil water content in this soil layer was quarried> original area> filling area; underground 210 ~ 450cm, the difference of soil moisture in different trimming areas was not significant, However, the soil moisture content of this layer is about 3 to 4 percentage points higher than that of the spring, and below 460 cm is less affected by the precipitation. In autumn, the soil moisture in the filling area can be restored to 450 cm underground. In conclusion, the digging area is more conducive to the growth of winter wheat in the irrigated area of dry land.