草业学报2019，Vol.28Issue(1)：5-14,10.DOI:10.11686/cyxb2018113
施肥与切根对退化羊草草原土壤理化性质和酶活性的影响
Influence of fertilization and root cutting on soil physicochemical properties and enzyme activities in a degraded Leymus chinensis steppe
摘要
Abstract
To improve the soil fertility of degraded Leymus chinensis steppe, influences of fertilization and root cutting on soil physicochemical properties and enzyme activities were studied.Key results were:1) Soil organic carbon, total phosphorus, C/N, electrical conductivity and pH were not affected by fertilization and root cutting, but soil total nitrogen was reduced 14.5％ by root cutting.2) Grassl and where root cutting was performed had higher soil enzymatic activity than fertilized grassl and, and soil urease activity was responsive to agricultural practices, ranging from 0.82-2.26mg NH4+·g-1·3h-1.3) Soil organic carbon level was positively correlated with soil total nitrogen, C:N ratio, ammonium nitrogen, nitrate nitrogen and available nitrogen, but was negatively correlated with total phosphorus, electrical conductivity, pH and enzymatic activities.Hence, fertilization and root cutting improved soil available nutrients in degraded L.chinensis steppe, and root cutting provided an additional benefit of increased soil enzymatic activities, which may also contribute to the increase in soil nutrient transformation.关键词
退化羊草草原/施肥/切根/土壤理化性质/土壤酶活性Key words
degraded Leymus chinensis steppe/fertilization/root cutting/soil physicochemical properties/soil enzymatic activities引用本文复制引用
秦燕,刘文辉,何峰,仝宗永,李向林..施肥与切根对退化羊草草原土壤理化性质和酶活性的影响[J].草业学报,2019,28(1):5-14,10.基金项目
青海省青藏高原优良牧草种质资源利用重点实验室(2017-ZJ-Y12),国家重点研发计划(2016YFC0500608-2)和现代农业产业技术体系建设专项资金(CARS-34)资助 （2017-ZJ-Y12）
