施肥对磷素在红油土中形态及分布的影响  

EFFECT OF FERTILIZATION ON THE FORMS AND DISTRIBUTIONS OF RHOSPHORUS IN LOU SOIL

作　　者：李和生[1] 李昌纬[1] 

机构地区：[1]西北农业大学农化系

出　　处：《西北农业学报》1995年第3期77-80,共4页Acta Agriculturae Boreali-occidentalis Sinica

摘　　要：对长期定位试验中的红油土０～１００ｃｍ各层次进行无机磷和有机磷分组研究，结果表明，无机磷组成经Ｃａ－Ｐ为主，有机磷组成以中度活性有机磷为主。施用无机磷肥对土壤无机磷的影响仅限于０～４０ｃｍ上层，其中各形态无机磷均有增加，增加幅度最大的是Ａｌ－Ｐ、Ｃａ－Ｐ＿Ｉ和Ｆｅ－Ｐ。施用有机肥可明显提高０～８０ｃｍ土层内有机磷含量，其中中度活性有机磷增加量最大；对无机磷在各层次的分配也有较大的影响。Fractionation of inorganic and organic phosphorus was carried out with soil samples of0～100 cm depth of Lou Soil in the plots of long-term fertilizing experiment fields. The results show thatfractions of inorganic and organic phosphorus are mainly composed of Ca-P and moderately labile or-ganic phosphorus ,respectively.The effect of application of inorganic fertilizer on soil inorganic phos-phorus was limited in the depth of 0～40 cm and each fraction of inorganic phosphorus is increased,ofwhich the highly increased fractions are Al-P, Ca-Pand Fe-P. Application of organic manure could in-crease the contents of soil organic phosphorus in 0～8 0 cm depth remarkedly ,in which the increase ofmoderately labile organic phosphorus is biggest.And application of organic manure could influence thedistribution of inorganic phosphorus in different depth.

关 键 词：红油土 施肥 无机磷 有机磷 形态 分布 

分 类 号：S143.2[农业科学—肥料学]