草业科学2012，Vol.29Issue(12)：1805-1809,5.
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
摘要
Abstract
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Key words
Medicago sativa/available phosphorus/rich-lack index of soil nutrient分类
农业科技引用本文复制引用
邵光武,刘治波,孙洪仁,沈月,曹影,刘琳,吴雅娜..黄骅市紫花苜蓿土壤有效磷丰缺指标初步研究[J].草业科学,2012,29(12):1805-1809,5.基金项目
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” （）
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” （）
草业科学北京市重点实验室共建项目 （）
