拉萨市不同种植类型对土壤酸化的影响  

Effects of Various Planting Patterns on Soil Acidification in Lhasa

作　　者：张国见[1,2] 周忠浩[2,3] 杜树汉[3] 刘刚才[3] 

机构地区：[1]成都理工大学,四川成都610059 [2]重庆市地勘局205地质队,重庆永川402160 [3]中国科学院成都山地灾害与环境研究所,四川成都610041

出　　处：《安徽农业科学》2010年第25期13784-13785,共2页Journal of Anhui Agricultural Sciences

基　　金：西藏高原拉萨市区土壤侵蚀分类分级研究

摘　　要：为了解西藏自治区拉萨市不同种植类型对土壤酸化的影响,选取种粮地、露天菜地和温室菜地3种主要种植类型进行了田间调查采样研究。结果显示,蔬菜种植施肥量明显多于种粮地,温室菜地施肥量最大。表层土壤(0～20cm)pH值差异显著,种粮地最高,温室菜地最低。在高强度施肥和漫水灌溉管理下,温室菜地土壤质量变化显著。为避免土壤加速酸化,必须减少氮肥用量和灌溉用水量。In order to understand the effects of different planting patterns on soil acidification in Lhasa,three main planting patterns including grain,open-field vegetable,and greenhouse vegetable are selected to conduct field investigation.Results show that fertilization in vegetable cultivation is significantly more than that in grain land,greenhouse vegetables cultivation calls for the most fertilization.The pH values of surface soil （0-20 cm） show significant differences,the grain land shows the highest pH value while the greenhouse vegetable land shows the lowest.Under high fertilization and flooding irrigation,the soil quality of greenhouse vegetable lands changes significantly.In order to avoid the acceleration of soil acid ification,to reduce nitrogen application and irrigation water become necessary.

关 键 词：土壤PH值 氮磷积累 菜地 半干旱 

分 类 号：X142.815.3[环境科学与工程—环境科学]