草业学报2016，Vol.25Issue(10)：48-55,8.DOI:10.11686/cyxb2015561
施肥对羊草草原土壤氮素转化的影响
Influence of fertilizer use on nitrogen transformation in soils of the Leymus chinensis steppe
摘要
Abstract
Fertilizer application is a common grassland management technique and plays an important role in the maintenance of grassland productivity and the health of its ecosystems.In this study,five kinds of fertilizer treatment were applied to determine their effects on soil nitrogen forms and transformations in the Leymus chinensis grasslands of Guyuan,Hebei Province.The results showed that,during the whole forage-growing season,the soil nitrate and ammonium nitrogen contents in grassland fertilized with both nitrogen and phos-phorus were lower than that in grassland fertilized only with nitrogen.The application of nitrogen fertilizer changed the process of soil nitrogen mineralization.Grasslands with nitrogen fertilization showed stronger soil nitrification than the other treatments during the period from May to August,and higher net nitrogen minerali-zation during the period from May to July,which accounted for 57.58%-68.97% of total net nitrogen miner-alization over the whole forage-growing season.Positive correlations were observed between soil ammonium ni-trogen content,soil nitrate nitrogen content,net nitrogen nitrification,net nitrogen mineralization,soil tem-perature and soil moisture (r =0.491,P <0.01 ).High levels of nitrogen fertilizer application could increase the loss of nitrate nitrogen by leaching and thus the risk of environmental pollution.关键词
净氮矿化量/净氮硝化量/施肥/羊草草原Key words
net nitrogen mineralization/net nitrogen nitrification/fertilizer use/Leymus chinensis steppe引用本文复制引用
秦燕,张威震,李向林,何峰,仝宗永,谢开云,王栋,Gammal,权国玲,宋谦,王虎..施肥对羊草草原土壤氮素转化的影响[J].草业学报,2016,25(10):48-55,8.基金项目
国家自然科学基金（31302015），公益性行业（农业）科研专项经费（201303060），国家牧草产业技术体系课题（CARS-35）和草地农业生态系统国家重点实验室开放课题（SKLGAE201506）资助。 （）
