水土保持研究2025，Vol.32Issue(1)：30-38,47,10.DOI:10.13869/j.cnki.rswc.2025.01.026
晋西黄土区不同植被恢复阶段土壤生态化学计量特征
Ecological stoichiometric characteristics of soil in different vegetation restoration stages in loess region of western Shanxi Province
摘要
Abstract
[Objective]Vegetation restoration can change the ecological stoichiometric characteristics of soil in a certain degree.Investigating soil stoichiometry changes during vegetation restoration is crucial for understanding the dynamics of soil nutrients and their underlying mechanisms.The aims of this research were to help elucidate the relationship between vegetation restoration and soil nutrient levels,and to provide valuable insights for practical applications in ecosystem restoration.[Methods]Five types of forest(grass)land at different stages of vegetation restoration in the loess region of western Shanxi Province:abandoned farmland,grassland,shrubland,pioneer arbor forest,and coniferous forest were examined.Through field surveys,sampling and laboratory analysis,the changes of soil ecological stoichiometric characteristics with the process of vegetation restoration and its influencing factors were investigated.[Results](1)With vegetation restoration,the SOC content of pioneer arbor forest and coniferous forest stage increased by 19.8％,soil TN content increased by 17.6％and soil TP content decreased by 12.4％compared with the previous stages.(2)With the development of vegetation restoration,the soil C∶P and N∶P increased significantly,and there was no obvious regularity of the changes of C∶N in pioneer arbor forest and coniferous forest stage.Soil C∶P increased by 26.6％compared with the previous stages,Soil N∶P in the 0-40 cm soil layer in the pioneer arbor forest and coniferous forest stage increased by 40.2％compared with the previous stages.Soil N∶P in the 40-100 cm soil layer increased by 35.7％compared with the previous stages,No obvious pattern was seen in the changes of soil C∶N among different vegetation restoration stages.The soil in the study area gradually changed from C and N limitation to P limitation.(3)Soil C∶P and N∶P in each vegetation restoration stage mainly showed significant negative correlation with sand content and significant positive correlation with porosity,and the correlation between soil C∶N and other factors was not obvious.[Conclusion]Vegetation restoration is conducive to the increase of soil C and N content,as well as the improvement of soil physicochemical properties.At the same time,during the process of vegetation restoration,attention should be given to the regulation of P element to improve the level of ecological restoration of vegetation in the loess area of western Shanxi.关键词
植被恢复/土壤养分/生态化学计量特征Key words
vegetation restoration/soil nutrient/ecological stoichiometric characteristics分类
农业科技引用本文复制引用
高连炜,张红丽,查同刚..晋西黄土区不同植被恢复阶段土壤生态化学计量特征[J].水土保持研究,2025,32(1):30-38,47,10.基金项目
国家自然科学基金项目(32271967) （32271967）
"十四五"重点研发项目(2022YFF1302501) （2022YFF1302501）
