应用生态学报2025，Vol.36Issue(2)：504-512,9.DOI:10.13287/j.1001-9332.202502.020
生草栽培对油茶林土壤肥力及活性碳组分的影响
Effects of grass cultivation on soil fertility and labile carbon fractions in Camellia oleifera forests
摘要
Abstract
Exploring the characteristics of soil fertility and labile carbon fractions under different cover crop cultiva-tion modes can provide scientific references for optimizing management of Camellia oleifera forests.We conducted a three-year field experiment with cover crop of Glycine max(DD),Trifolium repens(SY),Helianthus annuus(YK),Cosmos bipinnatus(BJ),with clean tillage as the control(CK),to investigate the changes of physical and chemical properties of topsoil(0-20 cm),the integrated fertility index(IFI),carbon pool management index,labile carbon fractions,and the yield per plant.The results showed that grass cultivation significantly reduced soil bulk density(BD)and increased the content of soil organic carbon(SOC),nitrate-nitrogen,total potassium,and available potassium.Compared with that under clear tillage,the IFIs of BJ and SY increased by 22.4％and 14.0％,respectively.The most significant increase in SOC were observed in BJ and SY,which were 30.1％and 19.3％,respectively.BJ and SY significantly increased but DD and YK significantly decreased carbon pool management index.Moreover,the yield per plant of BJ and YK was much higher than that of clear tillage,with an increase of 19.1％and 21.9％,respectively.Results of correlation analysis and partial least squares path model showed that grass cultivation significantly changed soil physical and chemical properties and increased labile carbon content,which effectively increased fruit yield.In short,grass cultivation could effectively improve soil nutrients and fruit yield.From the perspective of improving soil fertility,BJ and SY were more suitable for grass cultivation in C.olei-fera forests.关键词
生草栽培/活性碳组分/综合肥力指数/碳库管理指数Key words
grass cultivation/active carbon component/comprehensive fertility index/carbon pool management index引用本文复制引用
彭璞,贾剑波,陆佳,彭邵锋,李宇虹,卢梦琪,李弛..生草栽培对油茶林土壤肥力及活性碳组分的影响[J].应用生态学报,2025,36(2):504-512,9.基金项目
本文由湖南省林业科技项目(XLK202401)、湖南省重点研发项目(2023SK2055)、国家自然科学基金项目(42377283)、湖南省教育厅青年项目(22B0264)和湖南神农国油油茶产业科技创新创业团队项目(湘人才发[2022]9号)资助. （XLK202401）
