坝上地区紫花苜蓿土壤有效磷、钾丰缺指标初探  

Preliminary study on abundance and deficiency index of available phosphorus and potassium for alfalfa in Bashang soil

作　　者：谢勇[1,2] 孙洪仁[2] 张新全[1] 刘爱红[2] 孙雅源[2] 刘治波[1] 丁宁[2] 

机构地区：[1]四川农业大学动物科技学院草业科学系,四川雅安625014 [2]中国农业大学草地研究所,北京100193

出　　处：《草业科学》2011年第2期231-235,共5页Pratacultural Science

基　　金：农业部"948"国际先进农业科技引进重大专项项目"优质草产品加工技术"(2006-G38);科技部"十一五"科技支撑项目"优质草产品加工与高效利用关键技术研究"(2006BAD16B03);农业部公益性行业科研专项项目"人工草地优质牧草生产技术研究与示范"(nyhyzx07-022);农业部现代农业产业技术体系建设项目"现代牧草产业技术体系建设";科技部国家科技支撑计划项目"暖温带地区优质高抗牧草新品种选育及产业化示范"(2008BADB3B10)

摘　　要：从坝上地区的17个土壤样品中选取养分含量差异较大的5个地点的土壤,进行盆栽试验,设全肥（施N、P、K肥）、缺磷、缺钾和不施肥的4个处理,初步探索坝上地区紫花苜蓿（Medicago sativa）土壤磷、钾丰缺指标。结果表明,用坝上地区土壤种植紫花苜蓿,土壤有效磷极缺、缺、中等、丰富和极丰富的指标依次为〈3.5、3.5~9.8、9.8~21.4、21.4~27.7和〉27.7 mg/kg;有效钾极缺、缺、中等、丰富和极丰富的指标依次为〈2.4、2.4~15.6、15.6~63.4、63.4~101.2和〉101.2 mg/kg。Seventeen soil samples collected from different areas of Bashang region were analyzed for their soil fertility levels in the laboratory.Five samples which had different soil fertility from 17 soil samples were chosen for pot experiments to study on the abundance and deficiency index of available phosphorus and potassium for Medicago sativa.Treatments of the experiments were included well fertilized（added right amount of N,P,K）,phosphate deficiency（added right amount of N,K）,potassium deficiency（added right amount of N,P） and no fertilized（did not add N,P,K）.The results of this study showed when M.sativa was planted in Bashang soil,the indexes of available phosphorus in the soil at serious deficiency,deficiency,no deficiency,abundance and great abundance were 3.5,3.5-9.8,9.8-21.4,21.4-27.7 and 27.7 mg/kg,respectively.The indexes of available potassium in the soil at serious deficiency,deficiency,no deficiency,abundance and great abundance were 2.4,2.4-15.6,15.6-63.4,63.4-101.2 and 101.2 mg/kg,respectively.

关 键 词：紫花苜蓿 土壤养分 有效磷 有效钾 养分丰缺指标 坝上地区 

分 类 号：S541.9[农业科学—作物学]