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当前位置: 首页 > 文章 > 连续施磷条件下渗育性水稻土无机磷土层分布及移动特征 植物营养与肥料学报 2007,13 (1) 33-38
Position: Home > Articles > Distribution and movability of inorganic phosphorous on the percogenic paddy soil under continuously phosphorous fertilizer application Journal of Plant Nutrition and Fertilizers 2007,13 (1) 33-38

连续施磷条件下渗育性水稻土无机磷土层分布及移动特征

作  者：
赵海涛;封克;汪晓丽;盛海君
单  位：
扬州大学环境科学与工程学院
关键词：
施磷;无机磷形态;土层分布;移动;水稻土
摘  要：
通过3年田间肥料定位试验,采用顾益初、蒋柏藩的石灰性土壤无机磷分级方法,研究了太湖地区砂壤质渗育性水稻土不同无机磷形态在0—15 cm、15—30 cm和30—45 cm土层的分布及移动特征。结果表明,太湖地区砂壤质渗育性水稻土中的无机磷以Ca-P为主,其中Ca10-P含量最高。无论施肥与否,各土层中不同形态无机磷的含量都是Ca10-P>O-P、Fe-P>Al-P、Ca2-P、Ca8-P。3年定位施磷后,随施磷量增大表层(0—15 cm)土壤中总磷、Olsen磷、无机磷和无机磷各组分含量显著增加,而15—30 cm和30—45 cm土层中各无机磷组分的增加相对较小。土壤中总磷、无机磷和Olsen磷在土壤剖面中向下移动性随着土层的加深而减弱。其移动性呈Olsen磷>无机磷>总磷。植物有效无机磷源(Ca2-P、Ca8-P、Al-P)的下移比植物无效或缓效无机磷源(Ca10-P、Fe-P、O-P)的下移更明显。Olsen磷与土壤各层中的Ca2-P、Ca8-P、Al-P的相关性要比Fe-P、O-P和Ca10-P更大。
译  名：
Distribution and movability of inorganic phosphorous on the percogenic paddy soil under continuously phosphorous fertilizer application
作  者：
ZHAO Hai-tao,FENG Ke~*,WANG Xiao-li,SHENG Hai-jun(College of Environmental Science and Engineering,Yangzhou University,Yangzhou 225009,China)
关键词：
phosphorus fertilizer application;inorganic phosphorus fractions;soil layer distribution;move;paddy soil
摘  要：
A three-year field experiment was conducted to study the effects of phosphorus fertilization on the distribution of different inorganic P fractions of the percogenic paddy soil in Taihu region.The results indicated: Ca-P was the dominant soil inorganic P in Taihu region,among which the content of Ca_(10)-P was the highest.No matter P fertilizer was(applied) or not,the contents of inorganic P fractions showed same tendency in all three layers: Ca_(10)P > O-P and Fe-P > Al-P and Ca_2-P and Ca_8-P.After three years P application at same site,contents of total-P,Olsen-P,inorganic P,and inorganic P fractions at surface soil layer(0—15 cm) were increased remarkably,but in the deeper layers(15—30 and 30—45 cm) no significant increase was observed.The movability of totalP,inorganic P and Olsen-P to deeper layer was descended with soil depths.The movability of Olsen-P,was the highest followed by inorganic P and total P. Plant available organic P(Ca_2-P,Ca_8-P,Al-P) had higher downward movability than plant no/slow available P(Ca_(10)-P,Fe-P,O-P).The correlations between Olsen-P,and Ca_2-P,Ca_8-P, and Al-P at these three layers were more significant than that between O-P and Fe-P,O-P,and Ca_(10)-P.

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