Effects of Various Vegetative Restoration Patterns on Soil Fertility

HU Jiang-bo1,3,YANG Gai-he1,3,ZHANG Xiao-pei2,3,FENG Yong-zhong1,3 (1.College of Agronomy,Northwest Sci-Tech University of Agriculture and Forestry,Yangling 712100,China;2.College of Resources and Environment,Northwest SciTech University of Agriculture and Forestry,Yangling 712100,China;3.The Research Center of Recycle Agricultural Ehgineering and Technology of Shaanxi Province,Yangling 712100,China)

Weibei plateau;Vegetative restoration pattern;Soil fertility

The soil organic matters and available nutrients of several vegetative restoration patterns including Robinia pseudoacacia,Vitex negundo var.heterophylla,Platycladus orientalis,Medicago sativa and farmland were measured and their difference were checked by DUNCAN method.The results showed as the follows:soil organic matter contents under the several vegetative restoration patterns was decreased with soil deep increased,which was more obvious foe Vitex negundo var.heterophylla and Platycladus orientalis;several vegetative restoration patterns all increased soil organic matter content remarkably;soil available nitrogen and available potassium increased mach more than available phosphorus did after vegetative restoration,but soil available potassium under Medicago sativa vegetation decreased slightly and young Platycladus orientalis caused remarkable reduction of soil available nitrogen and available phosphorus.The mechanism of vegetative restoration improvement soil fertility and the under various vegetation were discussed.