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测定了某些温带和热带土壤的水溶性及交换性盐基阳离子,表明温带土壤阳离子的“有效性”既取决于交换性离子的总量,又与土壤溶液的电导有关,对于二价离子尤其是这样。热带土壤Ca和Mg的溶解度尚有待进一步研究。本文还对管理方面的某些问题作了讨论。
The determination of water-soluble and exchangeable base cations in some temperate and tropical soils suggests that the “validity” of the cation in temperate soil depends both on the total amount of exchangeable ions and on the conductivity of the soil solution, This is especially true of ions. Solubility of tropical soils Ca and Mg remains to be further studied. This article also discusses some of the management issues.