东北农牧交错区水分条件的空间分异及其对土地利用的影响  

The Moisture Regime Spatial Distribution of Farming and Pasturing Transitional Areas in the Northeastern China and Its Impacts on Land Use

作　　者：张军涛[1] 艾华[2] 于长英 

机构地区：[1]中国科学院地理科学与资源研究所 [2]大连管理干部学院,大连116031 [3]东北财经大学公共管理系,大连116025

出　　处：《地理科学进展》2001年第3期234-239,共6页Progress in Geography

基　　金：国家自然科学基金重点资助项目 ( 4 9731 0 2 0 )

摘　　要：大气降水、土壤水分和干燥度指数是在经度方向上控制区域景观格局的主要因素。本文运用最新的调查统计资料 ,对东北农牧交错区降水、土壤潜在蒸散量、干燥度指数及农作物生长期间土壤水分盈亏量的空间分布进行了分析 ;提出了研究区内作物生长季期间土壤潜在蒸散量的空间分布规律和干燥度指数的时空变化情形。结合水分条件的空间分布 ,提出了The vulnerable eco environment and most sensitive global environmental change characterize the research area. The moisture regime is a principle factor, by which the differentiation and variance of the physical geographical environment are influenced directly. The structure, function, and spatial distribution pattern of the regional eco geographical system along the longitude is determined by the key factors of precipitation, moist coefficient/aridity, and soil moisture regime. Regional differentiation in annual or growing season (from May to September) potential evapo transpiration is obvious. The annual aridity is increased from the east to the west of the research area, although it is affected by contour microclimates. The aridity in summer and fall is less than that in winter and spring. The regional differentiation in vegetation and soil is also impacted by the moist regime. Based upon the land use structure, the research area may be divided into five land use types.

关 键 词：农牧交错区 水分条件 空间分布 土地利用 大气降水 东北地区 土壤水分 干燥度 

分 类 号：S161[农业科学—农业气象学]