3种方法对不同土壤类型速效磷测定结果的影响

选取广东主要母质（玄武岩母质、花岗岩母质和三角洲冲积物）发育的水稻土经过不同磷肥量盆栽试验后的样品作为供试材料,设0.5 mm和2 mm两种粒径,分别采用Olsen、Bray-1和Mehlich-3等3种方法测定土壤中速效磷含量。结果表明：Bray-1法与Olsen法和Mehlich-3法保持在0.01水平下线性相关,而Mehlich-3法与Olsen法却无显著线性相关关系;各方法测定值的相对大小因土壤而异,主要表现在玄武岩母质发育的水稻土上,Mehlich-3-P小于Olsen-P,其他主要母质发育的水稻土Mehlich-3-P却均大于Olsen-P;Bray-1-P为Mehlich-3-P...

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Bibliographic Details
Published in广东农业科学 Vol. 38; no. 6; pp. 162 - 164
Main Author 高雅丽 徐新超 伏广农 贾田 张新明
Format Journal Article
LanguageChinese
Published 华南农业大学资源环境学院,广东广州,510642 2011
Subjects
水稻土
浸提剂
相关性
速效磷
相关性
水稻土
浸提剂
速效磷
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ISSN1004-874X
DOI10.3969/j.issn.1004-874X.2011.06.059

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Summary:选取广东主要母质（玄武岩母质、花岗岩母质和三角洲冲积物）发育的水稻土经过不同磷肥量盆栽试验后的样品作为供试材料,设0.5 mm和2 mm两种粒径,分别采用Olsen、Bray-1和Mehlich-3等3种方法测定土壤中速效磷含量。结果表明：Bray-1法与Olsen法和Mehlich-3法保持在0.01水平下线性相关,而Mehlich-3法与Olsen法却无显著线性相关关系;各方法测定值的相对大小因土壤而异,主要表现在玄武岩母质发育的水稻土上,Mehlich-3-P小于Olsen-P,其他主要母质发育的水稻土Mehlich-3-P却均大于Olsen-P;Bray-1-P为Mehlich-3-P的3～7倍不等,为Olsen-P的3～10倍不等,Mehlich-3-P为Olsen-P的2/3～3倍不等;土壤制样粒径对测定结果的影响不显著。
Bibliography:44-1267/S
paddy soil; available phosphorus; extractant; correlation
Three types of soils were derived from three main parent materials（basalt,granite,Perl River Delta sediments） in Guangdong.In order to determine the available phosphorus,the samples were sifted through 0.5 mm and 2 mm sieve respectively,then extractants of three methods were used to extract the available phosphorus of soils and then molybdenum-antimony-anti-spectrophotometric was used for the color reaction of phosphorus in solution.The results show that the correlationship between Bray-1 method and Olsen method or between Bray-1 method and Mehlich-3 method are extremely significant（P0.01）,but there are no correlationship between Olsen method and Mehlich-3 method.Besides,the determination values measured by different methods change with soil types.The Olsen-P is smaller than Mehlich-3-P on soil samples derived from basalt,while on soil samples derived from the other two parent materials,the results are opposite.Approximately,Bray-1-P is 3 to 7
ISSN:1004-874X
DOI:10.3969/j.issn.1004-874X.2011.06.059