摘要
垂穗披碱草/星星草混播草地三个放牧季的牦牛放牧试验结果表明：①随放牧强度的提高,各土壤层全氮和全钾含量出现了“高—低—高”的变化趋势,0-10cm土壤层全磷含量的变化趋势与之相反,而10-20cm和20-30cm土壤层上的变化趋势与全氮和全钾相似;②放牧强度对各土壤层全磷、全氮和全钾含量的影响分别为不显著（P〉0.05）、显著（P〈0.05）和极显著（P〈0.01）。
The results of grazing trial of gaks for three Puccinellia tenuflora showed：（1）With the increasing of grazing grazing seasons in mixed-sown grassland for Elymus natans/ intensity , contents of total nitrogen and potassium in every soil. depth appeared changing trend of the ＂low-high-low＂, and contents of total phosphorus in 0 - 10cm depths were contrary with the changing trend of total nitrogen and potassium , and then the changing trend of total phosphorus in 10 - 20cm and 20 - 30cm depths was similar with the changing trend of total nitrogen and potassium; （2） Influence of grazing intensity on contents of phosphorus , nitrogen and potassium in every soil depths were not significant （ P 〉 0.05 ）, significant （ P 〈 0.05 ） and extremely significant （ P 〈 0.01 ）, respectively.
出处
《青海畜牧兽医杂志》
2007年第5期4-6,共3页
Chinese Qinghai Journal of Animal and Veterinary Sciences
基金
国家"十五"科技攻关计划重大项目(2001BA606A-02)
2005年度青海三江源自然保护区生态保护和建设总体规划科研课题及应用推广招标项目(2005-SN-1)
国家"十一五"科技支撑计划重大项目(2006BACO1A02)
关键词
放牧强度
高寒混播人工草地
全氮
全磷
全钾
Grazing intensity
Alpine-cold mixed-sown artificial grassland
Total nitrogen
Total phosphorus
Total potassium
