黄骅市紫花苜蓿土壤有效磷丰缺指标初步研究  

A preliminary study on rich-lack index of soil available P for alfalfa in Huanghua City

作　　者：邵光武[1] 刘治波[2] 孙洪仁[1] 沈月[1] 曹影[1] 刘琳[1] 吴雅娜[1] 

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

出　　处：《草业科学》2012年第12期1805-1809,共5页Pratacultural Science

基　　金：农业部公益性行业科研专项"牧区优质高效饲草生产利用技术研究示范"(201003023);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"(CARS-35);草业科学北京市重点实验室共建项目

摘　　要：为给河北省黄骅市紫花苜蓿(Medicago sativa)施肥提供科学依据,于2010―2011年在该地区选取有效磷含量差异较大的11个地块的土壤,进行全肥和缺磷处理盆栽试验,依据不同有效磷含量土壤的缺磷处理的相对产量,初步研究了该地区紫花苜蓿土壤有效磷丰缺指标。结果表明,与缺磷处理相对产量>95%、85%～95%、75%～85%、65%～75%、55%～65%和45%～55%相对应的黄骅市紫花苜蓿的第1至第6级土壤有效磷含量指标分别为>47.5、27.2～47.5、15.6～27.2、8.9～15.6、5.1～8.9和2.9～5.1mg·kg-1。There are over 7 000 ha alfalfa planted in Huanghua city, Hebei province, but local alfalfa fertilization is lack of scientific guidance. The rich-lack indexes of soil nutrients are widely used in the world to determine appropriate fertilizer application rates due to they are very simple and convenient to he used in practice. In order to establish the rich-lack indexes of soil nutrients for alfalfa, a pot experiment was conducted in Huanghua city to preliminarily determine the rich-lack index of soil available P of alfalfa. Soils taken from 11 different farmland, which have big range in available P content, were used in this trial. The experiment was arranged for complete fertilizer treatment （CFT） and complete fertilizer except P treatment （CFEPT）. The regression analysis was done according to the relative yield （RF） [the yield of complete fertilizer except P treatment divided by that of complete fertilizer treatment] and soil available P content. The results showed that the 1st to 6th level of soil available P in Huanghua city, corresponding the relative yields 〉95%, 85%-95%, 75%-85%, 65%-75%, 55%-65%, 45%-55%, were〉47.5.27.2- 47.5.15.6-27.2.8.9-15.6.5.1-8.9 and 2.9-5.1 mg · kg^-1 , respectively.

关 键 词：紫花苜蓿 有效磷 养分丰缺指标 

分 类 号：S541.9[农业科学—作物学]