草业科学2024，Vol.41Issue(7)：1549-1557,9.DOI:10.11829/j.issn.1001-0629.2023-0226
喀斯特石漠化区林草间作对土壤养分及微生物数量的影响
Effects of forest-grass intercropping on soil nutrient and microbial populations in Karst rocky desertification areas
摘要
Abstract
Forest-grass intercropping presents numerous advantages in terms of water conservation,soil fertility enhancement,and biodiversity promotion.This method can be used as a model for ecological restoration in Karst rocky desertification areas.To investigate the influence of forest-grass intercropping on soil nutrients and microbial populations in such regions,we anlayzed three planting patterns:intercropping of Zanthoxylum bungeanum with Dolichos lablab,intercropping of Z.bungeanum with Paspalum thunbergii,and sole monocropping of Z.bungeanum.This research was conducted at a long-term experimental base in Bangui Township,Guanling County,Guizhou Province.The results demonstrated that compared with Z.bungeanum monocropping,intercropping with D.lablab and P.thunbergii led to increases in organic matter,total nitrogen,fast-acting potassium,and alkaline nitrogen in the soil.Furthermore,the soil pH decreased,and the number of soil microorganisms,particularly fungi,significantly increased.The effective phosphorus content significantly decreased in the 0-10 cm soil layer,whereas it increased in the 10-20 cm soil layer.Correlation analysis revealed a significant negative correlation between the number of bacteria in the 0-10 cm soil layer and effective phosphorus,whereas the number of fungi and organic matter,total nitrogen,effective phosphorus,and pH were significantly positively correlated.In the 10-20 cm soil layer,the number of bacteria was significantly positively correlated with fast-acting potassium,whereas the number of fungi exhibited a significant negative correlation with pH.These findings suggest that the ecological restoration model of forest-grass intercropping,composed of Z.bungeanum and forage,has positive effects on soil nutrients and microbial populations in Karst rocky desertification areas.关键词
喀斯特/石漠化/林草间作/土壤养分/微生物/植被恢复/退化土壤Key words
Karst/rocky desertification/forest-grass intercropping/soil nutrient/microorganisms/vegetation restoration/degraded soil引用本文复制引用
黄沛,张雷一,纪署光,李卫,姚斌,郑广,李昭..喀斯特石漠化区林草间作对土壤养分及微生物数量的影响[J].草业科学,2024,41(7):1549-1557,9.基金项目
十三五国家重点研发计划项目(2020YFF0305905) （2020YFF0305905）
国家自然科学基金项目(32260725) （32260725）
国家林业和草业局"948"项目(2013-4-80) （2013-4-80）
