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作者1987年至1989年对新修梯田土壤水分状况进行了研究,结果表明:新修梯田增墒保水,0~200cm的土壤储水量,干旱年份比坡耕地少1.5mm,平水年和丰水年比坡耕地多22.7—39.5mm,无论什么年份阴坡新修梯田储水量均高于阳坡,切土部位高于填土部位。坡耕地修成梯田后,谷子比坡耕地增产31%,马铃薯增产57%,每1 mm水分增产粮食0.22kg。
The authors studied the soil moisture status of the newly-built terraced fields from 1987 to 1989. The results showed that soil moisture content of newly-built terraced fields was increased, soil water storage 0-200 cm, 1.5 mm less than that of arable land in dry years, 22.7-39.5mm more than sloping farmland. No matter what year, newly-built terraces in shady slope had higher water storage capacity than the sunny slope, and the soil-cutting site was higher than the filling site. After the cultivation of slope farmland into terraced fields, the yield of millet increased 31% compared with that of sloping farmland, the yield of potato increased 57%, grain yield increased 0.22kg per 1 mm of water.