黄土丘陵区不同林地土壤水分动态变化  

Dynamics of Soil Water Content under Different Forestland in the Loess Hilly Region

作　　者：王晶[1] 朱清科[1] 刘中奇[1] 邝高明[1] 赵荟[1] 

机构地区：[1]北京林业大学水土保持与荒漠化防治教育部重点实验室,北京100083

出　　处：《水土保持研究》2011年第1期220-223,共4页Research of Soil and Water Conservation

基　　金：林业科技支撑计划项目(2006BAD03A0302)

摘　　要：研究黄土丘陵区不同林地的土壤水分变化,对于改善黄土高原生态环境建设有着重要的意义。采用定点监测的方法,对陕西省吴起县不同林地土壤水分动态变化进行了研究。结果表明:不同林地在生长季中土壤蓄水量具有显著差异,其顺序为:沙棘林>河北杨林>油松林>山杏林;林地的土壤蓄水量变化具有明显的季节性,根据生长季内土壤蓄水量的变化,可以将土壤水分变化分为3个时期:土壤水分恢复期、土壤水分消耗期、土壤水分补充期;各林地0-200cm土层土壤水分变异系数从小到大为:山杏林>河北杨林>沙棘林>油松林;在雨水入渗、蒸发、蒸散的共同作用下山杏林地在0-60cm土层含水量的变化明显大于其它林地。研究结果揭示了不同林种对土壤水分消耗和补给的影响,为当地造林结构配置和植被恢复与重建工作提供一定参考依据。Soil water content is crucial to vegetation rehabilitation on the hilly loess plateau.Using fixed-point dynamic monitoring methods,dynamics of soil water content under different forest were studied in forest or grass lands converted from farmlands in loess hilly region.Results showed that different forestland has a significant differences on soil water storage capacity in the growing season,in terms of soil water,forest species may be ranked in the descendant order of sea buckthorn,hebei poplar,Chinese pine,prunus armeniaca;forestland soil water storage has obvious seasonal change,according to growing season changes in soil water storage,soil moisture changes can be divided into three period： recovery period of soil moisture,consumption period of soil water,replenishment period of soil moisture;in the 0-200 cm soil layer,the variation coefficient of soil water in forestland may be ranked in the descendant order of prunus armeniaca,hebei poplar,sea buckthorn,Chinese pine.In the action of rainwater infiltration,evaporation,transpiration,soil water of prunus armeniaca are larger than other forestland in the 0-60 cm soil layer.The results of this study reveal the water consumption and water replenishment of different forest and give useful information to local forest structure and vegetation rehabilitation.

关 键 词：黄土丘陵区 不同林地 土壤水分 

分 类 号：S152.7[农业科学—土壤学]