Available Microelements in Soils under Different Stands in Northern Subtropics of China
北亚热带森林土壤有效微量元素状况研究(英文)

Contents, distribution and influencing factors of available B, Mo, Cu, Zn, Fe and Mn in soils under the stands of oriental oak, Chinese fir, loblolly pine, moso bamboo and secondary sprouting Chinese fir in northern subtropics of China, and the influences of different stands on soil microelement availability have been studied. The research area was situated in Xiashu Forest Farm, Jurong, Jiangsu Province, where the soil is yellow\|brown soil derived from siliceous slope wash of sand stone. The results revealed that the average contents of available B, Mo and Cu in the region were much lower than their respective critical levels, mean content of available Zn was near the critical level and Fe and Mn were rich; microelements distribution in soil profiles varied with elements and stands; soil organic matter and available P were found to be the major factors influencing the availability of micronutrients; the contents of available micronutrients in horizontal soils under different stands varied significantly, with those under the oriental oak almost all the highest, those under the secondary sprouting Chinese fir the lowest and the rest moderate and similar.