泾惠渠灌区土壤水分动态变化研究综述

Study on Dynamic Changing of Soil Moisture in Jinghuiqu Irrigation Area

在干旱、半干旱地区,水分是环境体系中最活跃的因素,植被对水分具有高度的依赖性,水分成为影响植物生存、生长发育的关键因素,对植被的稳定性生长与恢复重建具有极大的限制性。泾惠渠灌区位于陕西省关中平原中部,属大陆性半干旱气候区,该区降水时空分布不均,水资源短缺。从土壤水分的测试技术和土壤水分的动态变化研究方面进行综述,分析研究灌区2004～2007年四年土壤水分动态观测资料,得出研究区的土壤水分动态变化规律,同时简述水分有效性的研究进展,对提高农业干旱防御能力,制定节水灌溉计划,提高水分利用效率具有重要意义。

In the arid and semi-arid region,water is the most active factors in the environmental system,vegetation is high depend on water which become the key factors for influence on the plants survival and growth.And,it has great restrictive during the stability of the vegetation growth and recovery.Jing Hui canal irrigation district is located in Shaanxi province central middle plain,is a continental climate half dry area,the area of rainfall time and space is unevenly distributed and water resources are shortage.This paper is based on test technology and soil moisture of the soil moisture to study,analyzed the soil moisture dynamic observation data in the irrigation area of 2004 ～ 2007 four years,The study concluded that soil water dynamic change regulation,at the same time,sketch moisture availability research progress,have the important meaning of improving agricultural drought defense capacity,developing water-saving irrigation plan,improving water use efficiency.