围栏和翻耕对放牧草地土壤养分的影响  

Effect of fencing and tillage on soil chemistry characteristics in meadow ecosystems

作　　者：刘兵[1] 李向忱[1] 

机构地区：[1]吉林师范大学生命科学学院,吉林四平136000

出　　处：《广东农业科学》2010年第2期73-74,共2页Guangdong Agricultural Sciences

基　　金：吉林省教育厅"十一五"科学技术研究项目(吉教科合字[2007]367号);吉林师范大学(硕)博士启动基金(2005098)

摘　　要：研究了围栏和翻耕等措施对天然放牧草地土壤养分的影响。结果表明:围栏和翻耕措施能显著地增加土壤有机质、全氮、全磷、速效氮、速效磷和铵态氮(NH4+-N)含量,而使得硝态氮(NO3--N)含量大幅减少,但对土壤中全钾含量影响不大。围栏措施提高土壤养分含量效果更加明显。翻耕会破坏高寒草地固有的生草层,使其下面沙质基底成为草地沙化的主要物质来源,同时考虑到翻耕耗费的人力财力成本较高,因此建议在高寒地区的人工草地的建设中慎重选择翻耕措施而宜选择围栏封育。Effects of fencing and tillage on soil chemistry characteristics in meadow were analyzed. Results show that SOM, total N ,total P,available N,available P and NH4＋-N content in natural pastures increase significantly after fencing and tillage. NO3-N content decrease significantly after fencing and tillage, total K content didn＇t change. Fencing has much effect than tillage in creasing soil nutrient. Tillage destroys inherent grass growing soil layer leading to sand-bed becoming dominant degenerated meadow features and considering manpower and financial cost, fencing measures should be adopted, while tillage should be applied prudentially.

关 键 词：围栏草地 土壤养分 有机质 全氮 

分 类 号：S158.3[农业科学—土壤学]