Distribution and Turnover of Phosphorus, Nitrogen, Potassium, Calcium, Magnesium and Sodium and BHC in the Forest Ecosystem of Aso Volcano

Abstract

The content of elements in the H- and F-soil layers (cryptomeria pure forest and cryptomeria, white cedar, andromeda and hydrangea mixed forest) was in the order of calcium > magnesium > sodium>potassium>nitrogen=phosphorus. On the other hand, the content was in the order of K>N>Ca>Mg>Na = P for the herbs; N>Ca>K>Na = P for the trees. However, the content of N, K, P and Na (the content of each element was almost the same) was higher than that of Ca and Mg for insects. The content of N, Mg and P in the herbs near the craters was high compared with that in areas at a lower elevation the amount of BHC residues decreased in the order of L-layer>F-layer>H-layer and the amount of BHC residues in trees decreased near the creaters. © 1987, JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY. All rights reserved.