Historical tillage promotes grass-legume mixtures establishment and accelerates soil microbial activity and organic carbon decomposition

作     者：ZHOU Jiqiong GONG Jinchao WANG Pengsen SU Yingying LI Xuxu LI Xiangjun LIU Lin BAI Yanfu MA Congyu WANG Wen HUANG Ting YAN Yanhong ZHANG Xinquan ZHOU Jiqiong;GONG Jinchao;WANG Pengsen;SU Yingying;LI Xuxu;LI Xiangjun;LIU Lin;BAI Yanfu;MA Congyu;WANG Wen;HUANG Ting;YAN Yanhong;ZHANG Xinquan

作者机构：Department of Grassland ScienceCollege of Grassland Science&TechnologySichuan Agricultural UniversityChengdu 611130China Yunnan Sheep Breeding and Extension CenterKunming 655204China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2024年第16卷第7期

页      面：910-924页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：funded by the National Natural Science Foundation of China(32271776,32171616) the Special Sichuan Postdoctoral Research Projects the National Natural Science Foundation of Sichuan Province,China(2024NSFSC0309,2022NSFSC1769,2022NSFSC0110) 

主　　题：tillage grass-legume mixtures fencing grassland microbial biomass carbon β-glucosidase(βG) N-acetyl-β-D-glucosaminidase(NAG) 

摘      要：Perennial grass-legume mixtures have been extensively used to restore degraded grasslands,increasing grassland productivity and forage *** is crucial for seedbed preparation and sustainable weed management for the establishment of grass-legume ***,a common concern is that intensive tillage may alter soil characteristics,leading to losses in soil organic carbon(SOC).We investigated the plant community composition,SOC,soil microbial biomass carbon(MBC),soil enzyme activities,and soil properties in long-term perennial grass-legume mixtures under two different tillage intensities(once and twice)as well as in a fenced grassland(FG).The establishment of grass-legume mixtures increased plant species diversity and plant community coverage,compared with *** with once tilled grassland(OTG),twice tilled grassland(TTG)enhanced the coverage of high-quality leguminous forage species by 380.3%.Grass-legume mixtures with historical tillage decreased SOC and dissolved organic carbon(DOC)concentrations,whereas soil MBC concentrations in OTG and TTG increased by 16.0%and 16.4%,respectively,compared with *** significantly decreased the activity of N-acetyl-β-D-glucosaminidase(NAG)by 72.3%,whereas soil enzymeβ-glucosidase(βG)in OTG and TTG increased by 55.9%and 27.3%,respectively,compared with *** analysis indicated a close association of the increase in MBC andβG activities with the rapid decline in *** result suggested that MBC was a key driving factor in soil carbon storage dynamics,potentially accelerating soil carbon cycling and facilitating biogeochemical *** establishment of grass-legume mixtures effectively improves forage quality and boosts plant diversity,thereby facilitating the restoration of degraded *** tillage assists in establishing legume-grass mixtures by controlling weeds,it accelerates microbial activity and organic carbon *** findings provide a foundation for understanding the