Studies on Characteristics of Phosphorus Adsorption in Rhizosphere Soil of Poplar

doi:10.3321/j.issn:1000-7091.2006.02.025

Abstract

Abstract: It was investigated that characteristics of phosphorus adsorption in rhizosphere and non-rhizosphere soils of poplar.Results showed that phosphorus adsorption amounts in rhizosphere soil were lower than those in non-rhizosphere soil within phosphate contents tested,and when phosphate content tested was 30mg/L,the difference of phosphorus adsorption amount was the greatest between rhizosphere and non-rhizosphere soils and reaches-15.57mg/kg.Phosphorus adsorption data of rhizosphere and non-rhizosphere soils fit well with one-surface Langmuir,Freudlich and Temkin equations at a very significant level of 0.01,but one-surface Langmuir equation was the best.Phosphorus adsorption parameters of rhizosphere soil in three equations-Xm,k,k₁ and k₂ were clearly smaller than those of non-rhizosphere soils.Simple correlation analyses showed that Xm,k,k₁,and k₂ were negatively correlated with contents of available-P at a very significant level of 0.01.

Key words: Poplar, Rhizosphere soil, Phosphorus adsorption

CLC Number:

S153.6+1

ZHANG Jin-long, LI Peng, LI Yue-song. Studies on Characteristics of Phosphorus Adsorption in Rhizosphere Soil of Poplar[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(2): 104-107. doi: 10.3321/j.issn:1000-7091.2006.02.025.

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