Abstract
The Ca, Mg, Fe, Zn, Cu, and Mn concentration in the 0–20 cm and 20–40 cm soil layers of chestnut forest in the Yanshan mountainous area were determined by the available form and BCR three-step sequential chemical extraction methods. The bioabsorption coefficients and the relationships between elements in chestnut leaves and their fractions in soils were analyzed. Results showed that chestnut’s bioabsorption coefficients of Ca and Mn were higher than those of other elements. There was a negative correlation between the concentrations of Fe, Mn, and Cu in chestnut leaves and each of their fractions in soils, except for the deoxidized fraction Fe, and a positive correlation between fractions of Zn in soils and in chestnut leaves. The element fractions in soils could better reveal the biogeochemical characteristics of nutrient elements in chestnut forest soils. The nutrient status of chestnut leaves could be estimated by the acetic acid extractable fractions of Mn in the 0–20 cm soil layer and Fe and Zn in the 20–40 cm soil layer.
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