不同磷源在玉米根际的形态转化及有效性研究  

STUDY ON TRANSFORMATION AND AVAILABILITY OF DIFFERENT P IN RHIZOSPHERE OF MAIZE

作　　者：刘世亮[1] 介晓磊[2] 翟东明[2] 李有田[2] 丁克强[1] 

机构地区：[1]中国科学院南京土壤研究所,江苏南京210008 [2]河南农业大学农学院农学系,河南郑州450002

出　　处：《扬州大学学报（农业与生命科学版）》2003年第2期54-58,共5页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：河南省自然科学基金资助项目(960203011)

摘　　要：采用盆栽试验和室内分析方法,在2种不同质地石灰性土壤中,研究玉米根际与非根际土壤无机磷的形态转化及其有效性。结果表明:在2种不同质地的土壤中,不同形态无机磷含量顺序为Ca10 P>O P>Ca8 P>Fe P>Al P>Ca2 P,其中Ca10 P占50%以上;在不施磷肥的情况下,玉米的磷素营养主要来自土壤中的Ca2 P和Ca8 P,其中Ca8 P起主要作用;施入不同磷源后,在玉米根际土壤中生成的Ca8 P、Ca2 P比非根际土壤高,而Al P、Fe P及O P则相反。Transformation and availability of inorganic P in maize rhizosphere soils and non\|rhizosphere soils for two different texture calcaeous soils were researched by methods of pot trails and indoor analysis. The results were as follows: the amounts of different inorganic P were in the order of Ca10P>O\|P>Ca8\|P>Fe\|P>Al\|P>Ca2\|P in two different texture tested soils, and Ca8\|P about over 50%. The nutrition of maize largely was from Ca2\|P and Ca8\|P, with later (Ca8\|P) is main part, under the no phosphate manure adding into the soils. The amounts of Ca2\|P and Ca8\|P in the rhizosphere soils were bigger than in non\|rhizosphere soils, however, Al\|P, Fe\|P and O\|P were reversed when phosphate manure was added into the soils.

关 键 词：玉米 无机磷 形态转化 根际土壤 非根际土壤 

分 类 号：S513[农业科学—作物学]