白浆土-植物系统营养物质转化机制及其有效性研究Ⅱ.白浆土无机磷形态变化  

Transformation mechanism and availability of mutrients in albic soil plant system Ⅱ.Inorganic phosphorus transformation in albic soil.

作　　者：李法云[1] 高子勤[1] 

机构地区：[1]中国科学院沈阳应用生态研究所

出　　处：《应用生态学报》1999年第4期419-422,共4页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金

摘　　要：采用室内培养和微区试验研究表明，施入白浆土中无机磷在短时间内（２４ｈ、８ｄ）主要向ＦｅＰ和ＡｌＰ转变，较长时间后（８０ｄ），ＡｌＰ向ＦｅＰ转化，ＣａＰ变化较弱，土壤中无机磷形态转化与白浆土本身的土壤属性具有密切关系．施用有机肥改变了土壤中无机磷形态的转化过程，其与土壤中的铁、铝氧化物反应形成的“Ａｌ有机质Ｐ”和“Ｆｅ有机质Ｐ”Incubation test and microplot experiments were conducted to study the transformation of inorganic phosphorus in albic soil.The results show that most part of soil inorganic phosphate was transformed into iron and aluminum phosphates after a short period of incubation (24 hours and 8 davs,respectively),and aluminum phosphate was transformed into iron phosphate after 80 days of incubation.Calcium phosphate changed slightly throughout the whole period.A close relationship between inorganic phosphorus transformation and soil properties was found.The transformation process of inorganic phosphorus was changed by applying organic fertilizers,whose reaction with iron and aluminum oxides induced the formation of “organic matter iron phosphate” and “organic matter aluminum phosphate”complexes which can be easily uptaken by crop.

关 键 词：白浆土 无机磷形态 营养物质转化 

分 类 号：S155.26[农业科学—土壤学]