草业学报2016，Vol.25Issue(4)：55-62,8.DOI:10.11686/cyxb2015549
刈割对羊草草原土壤酶活性和养分含量的影响
Influence of cutting interval on soil enzyme activity and nutrients in Leymus chinensis meadow
摘要
Abstract
Soil enzymes are essential bioactive substances and among the most active components of soil ecosys-tems closely relation with the nutrient status of soils.This paper focused on the influence of cutting interval on soil enzyme activities and nutrients and their relationships in Leymus chinensis meadow in Hulunber.Soil ure-ase and alkaline phosphorus activity were most sensitive to forage cutting intervals.Compared with the annual cutting,soil urease activity was enhanced 0.4-1.0 times in the top 30 cm compared with forage cutting inter-vals between 2 and 6 years whereas soil alkaline phosphatase activity decreased by 28.9%-44.2%.Soil nutri-ents were influenced greatly by cutting.Longer cutting intervals did not result in significant differences in soil total nitrogen,available nitrogen,total phosphorus,available phosphorus and available potassium,but soil or-ganic matter was increased 10.5% in the 0-30 cm soil layer when grassland was cut every 6 years.With in-creasing cutting interval,variation in soil total nitrogen and organic matter content in the 30-60 cm soil layer were 0.36-0.66 g/kg and 12.26 -17.73 g/kg respectively,but available phosphorus and potassium content were reduced.Correlations between soil nutrients and enzyme activities differ with forage cutting interval.It is concluded that annual cutting does not adversely affect soil meaning that cutting L.chinensis meadow annually is a useful strategy for its management.关键词
刈割/土壤酶活性/土壤养分/草地管理Key words
cutting/soil enzyme activity/soil nutrient/grassland management引用本文复制引用
秦燕,何峰,仝宗永,陈宝瑞,李向林..刈割对羊草草原土壤酶活性和养分含量的影响[J].草业学报,2016,25(4):55-62,8.基金项目
国家牧草产业技术体系课题（CARS-35），公益性行业（农业）科研专项经费（201303060）和草地农业生态系统国家重点实验室开放课题（SKLGAE201506）资助。 （）
