水土保持学报2024，Vol.38Issue(3)：298-305,8.DOI:10.13870/j.cnki.stbcxb.2024.03.003
黄土丘陵区典型土地利用类型土壤一微生物量及其生态化学计量特征
Soil Microbial Biomass and Ecological Stoichiometric Characteristics of Typical Land Use Types in Loess Hilly Region
摘要
Abstract
[Objective]This study was aimed to investigate the effects of the typical ecological management model of"upward retreat and downward push"on soil-microbial C,N and P and their ecological stoichiometric ratios in loess hilly areas.[Methods]Typical land use types(artificial forest land,terrace,and Chuanland)in the loess hilly area of Ningxia were selected to study the response of soil-microbial C,N and P contents to land use changes and to analyze the ecological stoichiometric ratios,microbial entropy(qMBC,qMBN,and qMBP),and stoichiometric imbalances(C∶Nimb,C∶Pimb,and N∶Pimb)among the Relationship.[Results](1)Under the three typical land use types,SOC,C∶P,and N∶P in artificial forest land were higher than those in terraced and Chuanland,while TP content in agricultural land(terraced and Chuanland)was higher than that in artificial forest land.(2)The contents of soil microbial biomass C,N,and P ranged from 51.56 to 133.19,7.97 to 21.98,and 4.63 to 12.81 mg/kg,respectively.Among them,soil microbial biomass C,N,and P were in the order of artificial forest land＞terrace land＞Chuanland.The ratio of microbial biomass C,N,P,C∶Nimb,C∶Pimb,and N∶Pimb had certain characteristics of internal stability and had no significant difference among different land use types.(3)The three typical land use types had significant effects on microbial entropy,with the qMBC ranking as terraced land＞artificial forest land＞Chuanland,while the qMBN and qMBP ranking as artificial forest land＞terrace land＞Chuanland.Combined with RDA analysis,it was concluded that microbial biomass C∶P(R2=0.75,p＜0.01)and C:Pimb(R2=0.74,p＜0.01)were the key factors affecting the change of qMB.[Conclusion]In summary,the typical ecological management mode of"upward retreat and downward push"caused significant changes in soil C,P and microbial C,N and P contents,and the soil-microbial C,N and P and their stoichiometric ratios were mainly influenced by phosphorus under the typical land-use types.关键词
土地利用类型/土壤微生物生物量/微生物熵/生态化学计量比Key words
land use type/soil microbial biomass/microbial entropy/ecostoichiometric ratio分类
农业科技引用本文复制引用
胡斯乐,郭永忠,余旋,董立国,白晓雄,许浩,安钰,万海霞,韩新生,王月玲,李妍..黄土丘陵区典型土地利用类型土壤一微生物量及其生态化学计量特征[J].水土保持学报,2024,38(3):298-305,8.基金项目
宁夏农业高质量发展和生态保护科技创新示范课题项目(NGSB-2021-11-06,NGSB-2021-14-01) （NGSB-2021-11-06,NGSB-2021-14-01）
宁夏重点研发计划项目(2023BEG02050,2023BEG02042) （2023BEG02050,2023BEG02042）
宁夏青年拔尖人才培养工程项目(RQ0025) （RQ0025）
