放牧条件下红壤草地生态系统磷素循环研究  

Study on Phosphorous Circulation in Artificial Grassland System of Red Soil Area

作　　者：文亦芾[1] 蒋文兰[2] 赵权俊[3] 张宁[4] 

机构地区：[1]云南农业大学动物科学技术学院,云南昆明650201 [2]兰州大学,甘肃兰州730070 [3]云南农业大学经济贸易学院,云南昆明650201 [4]中国农科院土肥所,北京100081

出　　处：《草业与畜牧》2007年第5期1-4,8,共5页Pruataculture & Animal Husbandry

基　　金：云南省自然基金项目(2002C00BQ);云南省教育厅科学研究基金项目

摘　　要：通过对放牧条件下红壤草地-肉牛生态系统磷素的动态监测,对系统内磷素支出和收入进行了全面的分析研究。结果表明,在草地-肉牛系统中,可以忽略由降水带入系统内的磷素。牧草的残留量与肉牛代谢物是草地系统磷素摄入的主要来源,主要以枯落物和粪便的形式归还给系统。系统内磷素的土壤损失占系统养分损失的主要部分,肉牛损失以畜产品输出为主。The experiment of phosphorous circulation in grazing system was conducted and monitored in red soil area. The results showed that plant and animal residues were the main phosphorous input and the quantity of rainfall input could be neglected. According to soil test, phosphorous loss from soil in grazing system was visible. Phosphorous loss from animals was another important path in grazing system.

关 键 词：红壤 放牧系统 磷循环 平衡施肥 

分 类 号：S812.8[农业科学—草业科学]