基于Meta分析研究中国北方干旱半干旱地区人工植被恢复对土壤容重的影响

Influence of Vegetation Construction on the Soil Bulk Density in Northern China Based on Meta-analysis

指出了植被建设不仅是中国北方干旱半干旱地区防治风蚀和水蚀的最为有效手段,而且对于土壤物理性质的改良效果显著。在收集有关中国北方干旱半干旱地区植被建设后土壤容重研究文献的基础上,采用Meta分析法研究了该地区植被建设(乔木和灌木)对土壤容重的影响。结果表明:北方干旱半干旱地区植被建设总体上土壤容重产生显著降低作用(结合效应值为-0.209);乔木栽植能在一定程度上降低土壤的容重(-0.199),其影响效果不显著;灌木栽植导致土壤容重大幅度降低(-0.222),并且其影响非常显著。在干旱半干旱地区开展灌木栽植能够有效降低土壤容重,提高土壤质量。

Vegetation construction is the most effective way to control erosion by wind and bulk density in the arid and semi--arid regions of northern China. And it has a significant effect on the improvement of soil physical property. Based on published literatures of soil bulk density change following revegetation in the arid and semi--arid regions of northern China, this paper analyzed the influences of two kinds of vegetation construction （trees and shrubs） on soil bulk density using a recta--analysis. The results showed that vegetation construction produced prominent negative effects on soil bulk density（the effect size is -0. 209） ; Shrub planting resulted in a significant decrease in soil bulk density （effect size： -0. 222）, while tree planting had a negative effect on soil bulk density （effect size：-0. 199） though no significant influence was found. Shurb planting could decrease soil bulk density and improve soil quality in the arid and semi--arid regions.