区域中的水分状况分析  

THEANALYSES ON REGIONAL WATER CONDITIONS

作　　者：赵秀锋[1] 杨志红[1] 

机构地区：[1]中国科学院兰州冰川冻土研究所

出　　处：《干旱区地理》1991年第3期40-44,共5页Arid Land Geography

摘　　要：水分状况在很大程度上影响着区域内农业生态系统的生产力.本文以干湿线为基础分析了水分状况在区域中的动态变化.应用干湿线可以确定农作物的最佳生长区域、水分不足区不同作物生长期所需补充的田间灌溉用水量.并可作为区域农田用水灌溉的决策依据.The projuctivity of ecosystcm is influenced by the regional water conditions in a greatdegree. Though the (?)(?)rious aridity coefficients may reflect the mean annual arid--humidcondition, but they fail in revealing the dynamic temporal -spacial changing of water condi-tion. This problem can besolved by the aridity line which is based on the water balance Us-ing the aridity line to analyse the regional water condition, we can suboivide the aridperiod(area). humid period(area) and determine the optimumrgrowing area of crop. Theanalysing of the aridity line can be used as the foundation of irrigation, agricultural plan-ning and distribution of agriculture.

关 键 词：干湿线 水分状况 水分动态 

分 类 号：S152.75[农业科学—土壤学]