摘要
本文利用位于塔里木盆地西北部平原上的阿克苏水平衡站近几年的有关试验和监测资料，对绿洲农田和裸地的土壤水分动态变化规律进行了初步分析，并用水量平衡法计算和对比了农田和裸地的蒸发量，最后分析了田间灌溉水的有效利用率及提高措施．
According to the experimental data from Aksu Water Balance Experimental Station located in Tarim Basin, some soil moisture characters in irrigated farmland and bare land are analyzed. The evaporation from bare land is calculated with water balance method. The trrigation emciency is also analyzed in the paper. The conclusions are as following: (1) The soil moisture in oasis farmland of arid area has a scasonal variation. The seasonal variation of soil moisture is obvious for thc land with a high ground water table and an high initial soil water storage. (2) For the irrigated land,the dynamic variation range of soil moisture in the root layer is larger than that of other soil layers. (3) For the newly reclamed oasis farmland in Tarim Basin, there are special variable patterns of soil moisture, which are mainly caused by the heterogeneous soil texture, uneven irrigation and heterogeneous evapotranspirahon. (4) The annual variation range of ground water table is 1 .0~ 1.5 m in the irrigated area. It is higher in irrigated season than in non-irrigated season. Over irrigation can make the ground water table rise for 0.2~0.5 m.(5) The irrigation effidency of the oasis farmland in Tarim Basin is about 8O%. Irrigated water not only supplies the soil layers but also supplies the ground water. The present irrigation practice should be improved.
出处
《干旱区地理》
CSCD
北大核心
1996年第3期66-71,共6页
Arid Land Geography
基金
国家自然科学基金!"塔里木绿洲地表水热平衡过程与机制的实验理论研究"
