Distribution of Soil Zinc, Iron, Copper and Manganese Fractions and Its Relationship with Plant AvailabilityEnglish Full Text

ZOU BANG-JI and MO RUN-CANG(Institute of Applied Ecology, Academta Sinica, Shenyang 110015 (China))

Abstract: The distribution of various fractions of Zn, Fe, Cu and Mn in 15 types of sods in China and its rela-tionship with plant availability were studied. Wactions of various elements were found to have some similarcharacteristic distribution regularities in wirious types of soils, but various soil types derered to varyingdegrees in the distribution of each fraction. Soil physico-chemical properties, such as pH, CEC and thecontents of OM, CaCO₃, free Fe, free Mn and P₂O₅, were signdicantly correlated with the distribution ofelemental fractions, and a significazit correlation also existed between the distribution and plant amilabilityof elemental fractions. Varfous fractions of each element were divided into two groups bed on their plantavailability. The correlation between the distribution of combination fractions aiid plaxit availability indi-cated a significantly or an extremely significantly positive correlation for Group I but a significantly or anextremely significantly negative correlation for Group II. Therefore, the fractions in Group I were primarypools of available nutrients, while those in Group II could hardly provide available nutrients for plants. Descreasing the transformation of corresponding elements into fractions of Group 11 and increasing the storagecapacity of various fractions of Group I were an important direction for regulation and controiling of soilnutrients. However, some Particular soils with too high contents of Zn, Fe, Cu and Mn should be regulatedand controlled adversely

Keywords：

awtlabilityi distribution; soils; Zn; Fe; Cu and Mn fractions;

Series：
(D) Agriculture
Subject：
Fundamental Science of Agriculture; Agronomy
Classification Code：
S153

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Distribution of Soil Zinc, Iron, Copper and Manganese Fractions and Its Relationship with Plant AvailabilityEnglish Full Text

ZOU BANG-JI and MO RUN-CANG(Institute of Applied Ecology, Academta Sinica, Shenyang 110015 (China))

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