不同恢复措施对退化草地土壤水分和养分的影响  

EFFECT OF DIFFERENT RESTORATION MEASURE ON THE MOISTURE AND NUTRIENT OF SOIL OF DEGRADATED GRASSLANG

作　　者：张伟华[1] 关世英[1] 李跃进[1] 武永智[1] 

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010019

出　　处：《内蒙古农业大学学报（自然科学版）》2000年第4期31-35,共5页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：中国科学院内蒙古生态系统定位站基金

摘　　要：本文研究了退化草地围封后恢复过程中翻耕 ,耙地和人工补种 (羊草 +豆科 )措施对土壤水分与养分变化的影响。结果表明 :封育措施对土壤水分、养分的影响最为明显 ,封育 5 a土壤表层有机质增加了 0 .5 4% ;封育 8年增加了 1.0 6 % ,土壤全氮全磷亦有明显增加 ,土壤表层含水量增加了 3.2 % ;围栏内封育 2 a后 ,翻耕措施对增加土壤水分、养分均高于人工补种 (羊草 +豆科 )和对照 ;封育 8a,各种措施之间有趋同性 ,但羊草 +豆科措施土壤养分及水分含量均高于翻耕和对照 。Effects of the measures of ploughing and harrowing field, and resowing aneurolepidium chinense during restoring after closed the degradation grassland on the moisture and nutrients of soil were studied.Effects on the moisture and nutrient were obvious by closed grassland measure.The organic matter content of soil on the surface was increased by 0.54%after closed grassland for five years and it was increasad by 1.0% after closed grassland for eight years.After closing grassland for eight years,the moisture content of soil on the surface was increased by 3.2%,and the total content of nitrogen and phosphate of soil was alse increased.The content moisture and nutrients of slil by measure of plouth and harrouiry ivas hight than by measure of resowing aneuvolepidiu chinensem and bean and contrast after closing for two years.All kinds of measures trend similarly after closing for 8 the years.But the moisture and nutrientsc ontent of soil by measure of resowing aneurolepidium chinense was higher than by measure of plough and contrasr.It is because that the root of bean is deep.

关 键 词：恢复措施 退化草场 土壤水分 土壤养分 

分 类 号：S812.8[农业科学—草业科学] S157.42[农业科学—畜牧学]