施磷肥对高寒草甸草原牧草的增产效应研究  

Study on the effect of phosphorus fertilizer application on forage yield in alpine meadow

作　　者：马隆喜 辛小云 孙志英 年林 索南扎西 姜哲浩[2] MA Long-xi;XIN Xiao-yun;SUN Zhi-ying;NIAN Lin;Suonanzhaxi;JIANG Zhe-hao(Grassland Workstation of Xiahe County Gansu Agricultural University /Key Lab Pratacultural Engineering Laboratory o he 749100,China;College of Pratacultural Science for Grassland Ecosystem of Ministry of Education/ Gansu Province /Sino-U.S.Centers for Grazing Land Ecosystem Sustainability,Lanzhou 730070,China)

机构地区：[1]夏河县草原工作站,甘肃夏河749100 [2]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《草原与草坪》2018年第3期17-22,共6页Grassland and Turf

基　　金：国家公益性行业(农业)专项"青藏高原社区畜牧业子课题夏河社区天然草地保护与合理利用技术研究与示范"(210203006);国家重点研发计划"退化高寒草原恢复及生态功能提升技术与示范"(2016YFC0501902)项目资助

摘　　要：以地处青藏高原东北边缘的甘南高寒草甸为研究对象,分析了施磷肥对牧草产量和经济类群的影响。结果表明:随着施磷水平的增加,高寒草甸牧草产量有不同程度的提升,牧草增长率在19%~96%。施肥对不同经济类群的增产效应不同,豆科牧草地上生物量增幅最大,当施肥量为180kg/hm2时产量增长率最高(1 030%)。三次多项式函数施肥模型能更好的模拟施磷肥对高寒草甸草原牧草的增产效应,施肥量为163.2kg/hm2时的增长率最高,为90.57%,施肥量为153.6kg/hm2时的增长效益最高,为0.411%/元。The effect of phosphorus fertilizer application on forage yield and economic group of alpine meadow in Gannan on the northeast edge of Qinghai-Tibetan Plateau.Results showed that along with the increase of phosphorus application level,the forage yield in alpine meadow was improved and the total increase rate of forage yield ranged from 19%to 96%.The effect of fertilizer application on different economic groups varied.The forage yield of legumes shown a maximum increase,its increase rate reached the highest value（1030%）under180 kg/ha of fertilizer application rate.The cubic polynomial fertilization model could simulate the effect of phosphorus fertilizer application on forage yield.Based on the model,the increase rate and the growth benefit reached the highest（90.57% and 0.411% per Yuan）at fertilization level of 163.2 kg/ha and 153.6 kg/ha respectively.

关 键 词：高寒草甸 施肥 产量 经济类群 施肥模型 

分 类 号：S147.2[农业科学—肥料学]