Effects of phosphorus fertilizer application on phosphorus fractions in different organs of Cordia trichotoma  

作　　者：Matheus S.S.Kulmann Lincon O.S.Stefanello RaíA.Schwalbert Álvaro L.P.Berghetti Maristela M.Araujo Rogerio Piccin Luciano C.Gatiboni Tales Tiecher Paulo A.A.Ferreira Gustavo Brunetto 

机构地区：[1]Department of Soil Science,Federal University of Santa Maria,Santa Maria,Rio Grande do Sul,Brazil [2]Department of Rural Engineering,Federal University of Santa Maria,Santa Maria,Rio Grande do Sul,Brazil [3]Department of Forest Engineering,Federal University of Santa Maria,Santa Maria,Rio Grande do Sul 97105-900,Brazil [4]Agroveterinary Science Center,State University of Santa Catarina,Lages,Santa Catarina,88520-000,Brazil [5]Department of Soil Science,Federal University of Rio Grande do Sul,Porto Alegre,Rio Grande do Sul 91540-000,Brazil

出　　处：《Journal of Forestry Research》2021年第2期725-732,共8页林业研究（英文版）

基　　金：financed in part by the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico(CNPq);the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil(CAPES)。

摘　　要：The application of phosphorus(P)to soil can increase its availability to plants and alter P fractions in annual and perennial organs of Cordia trichotoma.If a portion of P accumulates in perennial organs in organic fractions it can be used in the next growth season,possibly decreasing plant dependence on P derived from soil fertilization.However,if P is preferentially accumulated in inorganic fractions in annual organs,plants will be more dependent on phosphate fertilization.This study aimed to evaluate the distribution of P fractions in organs of C.trichotoma grown on sandy soil treated with 120 and 360 kg P2O5 ha^(−1).The control was a zero application.After 24 months following fertilization,C.trichotoma seedlings were cut and separated into leaves,branches,stems and roots,dried,ground and subjected to chemical fractionation of P,which estimates fractions of total soluble P,soluble inorganic and organic P,lipid P,P associated ribonucleic acid and deoxyribonucleic acid,and residual P.P in annual organs,as leaves,accumulated preferentially in the soluble inorganic fraction in both treatments.In perennial organs such as stems and branches,P accumulated preferentially in the soluble organic fraction.The application of 300%of the recommended dosage(360 kg P2O5 ha^(−1))promoted the accumulation of P in soluble organic fractions which may contribute to annual growth the following season and be a strategy to reduce the dependence of 2-year-old stands on soil-derived P and on fertilizers.

关 键 词：Chemical fractionation PHOSPHORUS Phosphate fertilization Plant phosphorus 

分 类 号：S714[农业科学—林学]