中南林业科技大学学报2025，Vol.45Issue(5)：103-112,10.DOI:10.14067/j.cnki.1673-923x.2025.05.010
东北黑土区退耕还林植被对土壤健康的影响
Effects of soil health with different vegetation of returning farmland to forests in the black soil region of northeast China
摘要
Abstract
[Objective]Returning Farmland to Forests is a important ecological construction project of China.Establishing soil health evaluation system,evaluating soil health with different vegetation restoration in black soil area of northeast China can provides data support for scientific evaluation of ecological benefits of returning farmland to forest.[Method]Field sampling and laboratory testing were used.The topsoil with different vegetation(pure larch plantation,mixed tree and shrub forest)were selected at the black soil region of northeast China as the object of study,the cultivated soil were treated as the control,and research the soil health of different vegetation by measuring soil physical,chemical and biological indexes.[Result]1)the soil bulk density of pure larch plantation and mixed forest decrease significantly by 14.28％-15.04％compared with the control,the saturation moisture capacity were significantly increased by 33.34％-59.84％compared with the control.The saturation moisture capacity of mixed forest was increased by 19.87％compared with the pure larch plantation;2)The content of soil total nitrogen,organic carbon and rapidly available potassium were significantly increased by 20.44％-29.16％,35.16％-38.28％and 85.58％-121.63％.The improvement of mixed forest on soil chemical properties was more significant;3)The soil microbial carbon and nitrogen contents of pure larch plantation and mixed forest were significantly increased by 105.95％-1 83.43％and 81.95％-142.43％compared with the control.The solid-sucrase activity of mixed forest was significantly increased by 55.46％compared with the control.4)The soil health score of the different vegetation was in the order of mixed forest(9.86 points)＞pure larch plantation(6.97 points)＞cultivated land(3.65 points).[Conclusion]To sum up,the soil health scores of pure forest and mixed forest were both significantly increased than control,the mixed forest had the highest score.After returning farmland to forest,the vegetation improved soil health mainly by improving soil water holding capacity and soil structural stability.In general,it is recommended to enrich the species of the vegetation when restore the soil,the mixed tree and shrub forest can be utilized to improve the soil health.关键词
退耕还林/土壤健康评价/土壤酶活性/土壤理化性质/东北黑土区Key words
returning farmland to forests/soil health evaluation/soil enzyme activity/soil physicochemical properties/black soil region分类
农业科技引用本文复制引用
刘冰洁,张玉鹏,李雨,赵怡凯,付玉..东北黑土区退耕还林植被对土壤健康的影响[J].中南林业科技大学学报,2025,45(5):103-112,10.基金项目
国家重点研发计划项目(2022YFE0115300). （2022YFE0115300）
