高寒草甸鼢鼠鼠丘土壤理化特性对放牧管理模式的响应  

Response of soil physical and chemical properties of zokor mounds to grazing management modes in an alpine meadow

作　　者：张倩 姚宝辉[1,2] 杨晶 蔡志远 孙小妹[2,3] 苏军虎 ZHANG Qian;YAO Baohui;YANG Jing;CAI Zhiyuan;SUN Xiaomei;SU Junhu(College of Grassland Science/Key Laboratory of Grassland Ecosystem(Ministry of Education)/Pratacultural Engineering Laboratory of Gansu Province/Sino-U.S.Centers for Grazing land Ecosystem Sustainability,Gansu Agricultural University,Lanzhou 730070,Gansu,China;Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity,Gansu Agricultural University,Lanzhou 730070,Gansu,China;College of Resource and Environmental Science,Gansu Agricultural University,Lanzhou 730070,Gansu,China)

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]甘肃农业大学−新西兰梅西大学草地生物多样性研究中心,甘肃兰州730070 [3]甘肃农业大学资源与环境学院,甘肃兰州730070

出　　处：《草业科学》2022年第2期222-234,共13页Pratacultural Science

基　　金：国家自然科学基金项目(31460566、31760706);陇原青年创新创业人才(团队)项目(LYRC2019-2);甘肃农业大学“伏羲杰出人才”培育项目(Gaufx-02J03)。

摘　　要：研究东祁连山高寒草甸划区轮牧(RG)、生长季休牧(GSG)、连续放牧(CG)和禁牧(PG)4种放牧管理模式下高原鼢鼠(Eospalax baileyi)不同年限的鼠丘[1年(ZM1)、2年(ZM2)、3年(ZM3)和4年以上(ZMM)]与对照(CM)草甸土壤理化特性,旨在评价放牧对鼠丘演替过程中土壤理化特性的影响,为高寒草甸的放牧管理提供参考。结果发现:与PG比较,GSG可以显著增加ZM2和ZM3在0−10 cm层土壤的含水量(P<0.05),并且可增加ZM3在0−10、10−20和20−30 cm层的全氮含量;与CG比较,GSG能显著增加ZM1和ZM2在0−10 cm层土壤全磷含量(P<0.05),同时,RG也可以显著增加ZM2在0−10和10−20 cm土层土壤碳氮比(P<0.05)。结构方程模型分析发现,不同管理模式对ZM3的土壤含水量、全氮和有机碳具有正影响,对ZMM的土壤有机碳和碳氮比具有正影响。综合分析发现生长季休牧能够较好地恢复鼠丘土壤养分含量。The aim of this study was to analyze zokor(Eospalax baileyi)of different mound ages[one-year(ZM1),two-year(ZM2),three-year(ZM3),and Multi-year(ZMM)]and control meadow(CM)under four grazing management modes rotational grazing(RG),growing season grazing(GSG),continuous grazing(CG),and prohibition grazing(PG).The study was performed to evaluate the effects of grazing on soil physicochemical properties during the succession of zokor mounds and provides references for grazing management in alpine meadow.The results showed that GSG significantly increased the soil water content of ZM2 and ZM3 in 0−10 cm layers compared with PG.In addition,total nitrogen content of ZM3 in 0−10,10−20,and 20−30 cm layers significantly increased(P<0.05),respectively.Compared with CG,GSG significantly increased the total phosphorus content of ZM1 and ZM2 in 0−10 cm layers(P<0.05),and RG significantly increased the soil C/N ratio of ZM2 in 0−10 cm and 10−20 cm layers(P<0.05),respectively.Structural equation model analysis revealed that different management regimes had a positive effect on the soil water content,total nitrogen,and organic carbon of ZM3 and had positive effects on soil organic carbon and C/N ratio of ZMM.Therefore,GSG can better restore the soil nutrient content of zokor mounds compared with other grazing management modes.

关 键 词：东祁连山高寒草甸 放牧模式 高原鼢鼠 鼠丘演替 土壤物理特性 土壤化学特性 

分 类 号：S812.6[农业科学—草业科学]