以不覆盖的处理为对照，研究了冬小麦期覆盖秸秆对夏玉米土壤水分动态变化及产量的影响。
Taking bare surface as CK, this paper discussed effect of straw-mulch during wheat stage on soil water dynamic changes and yield of summer maize.
依据定位观测数据，对紫色土丘陵区农用地土壤水分的动态变化规律进行了初步研究。
Based on the data of observation in fixed location, the pilot study on soil moisture dynamic variation law of farmland in purple soil hilly region has been done.
植物根系对土壤水分动态变化影响明显。
Root system of vegetation clearly influence the trends change of soil water.
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