草业科学2018，Vol.35Issue(4)：749-759,11.DOI:10.11829/j.issn.1001-0629.2017-0376
青藏高原东部乡土植物对高寒沙化草地土壤性质的影响
Effect of four native plant species on soil properties in desertified alpine meadow of the Tibetan Plateau
摘要
Abstract
Desertification has already become a serious threat to alpine meadows in southeastern Tibetan Plat-eau,and to provide scientific evidence for selecting adaptive plant species and a reasonable direction for recove-ring desertified alpine meadows,the effects of four native plant species,including Rhodiola rosea,Kengyilia rigidula,Elymus nutans,and Salix cupularis,on soil physicochemical properties,soil enzymes,and soil mi-crobial biomass were explored in this study.The results showed that:1)After five years of vegetation restora-tion,soil moisture increased significantly (P<0.05),and increased the most (by 357.70%)in the treatment with E.nutans among the four plant species;meanwhile,both soil pH and bulk density decreased at different levels for the different species;2)Activities of soil enzymes related to carbon,nitrogen,and phosphorus cycles increased significantly (P<0.05),and the activities of cellulase,peroxidase,sucrase,protease,and phospha-tase in the treatment with R.rosea,which were 3.19,1.98,3.22,1.87,and 4.59 times that of the control,re-spectively,exhibited the highest values than the others;3)Soil microbial biomass carbon (MBC)and nitrogen (MBN)increased significantly (P<0.05),and soil MBC,MBN,and microbial biomass carbon to nitrogen ra-tio (MBC MBN),which were 4.39,3.46,and 1.27 times that of the control,respectively,were the highest in the treatment with R.rosea;4)The correlations between soil enzyme activity,soil physicochemical properties, and microbial biomass factors were significant in the two treatments with R.rosea and S.cupularis;however, these correlations were not observed in the treatment with E.nutans.The results indicated that R.rosea could embody the best approach to restore desertified alpine meadows among the four native plant species after five years of planting.关键词
高寒沙化草地/土壤理化性质/土壤酶活性/土壤微生物量Key words
desertified alpine meadow/soil physicochemical property/soil enzyme activity/soil microbial biomass分类
农业科技引用本文复制引用
张潇喜,陈有军,曾凯,蔡义民,马赛男,宋洋,刘琳,陈冬明,周春梅,孙飞达..青藏高原东部乡土植物对高寒沙化草地土壤性质的影响[J].草业科学,2018,35(4):749-759,11.基金项目
教育部"春晖计划"合作科研项目(Z2015078) （Z2015078）
四川省科技厅国际合作项目(2016HH0087) （2016HH0087）
四川省科技厅重点专项(2015SZ0062) （2015SZ0062）
