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研究了北亚热带 2 5 a生栓皮栎林、杉木林、火炬松林、毛竹林和 5年生 2代杉木萌芽林土壤中 B、Mo、Cu、Zn、Fe、Mn的有效含量、在土壤剖面中的分布规律、影响其有效性的土壤因子以及不同林分对土壤微量养分含量的影响。结果表明 ,在该地区的森林土壤中 ,有效 B,Mo,Cu的平均含量均低于各自临界值 ,有效 Zn平均含量接近临界值 ,Fe,Mn含量丰富 ;有效微量养分在土壤剖面中的分布因林分和元素种类而异 ;影响微量元素有效性的主要土壤因子为有机质和有效磷含量 ;不同林分对土壤有效微量元素含量有显著影响 ,栓皮栎林土壤中有效微量养分含量最高 ,2代杉木萌芽林最低 ,其余林分居中且基本接近。
The effective contents of B, Mo, Cu, Zn, Fe and Mn in the soil of 2 5 a seed cortex Quercus variabilis, Cunninghamia lanceolata, Pinus taeda plantation, Moso bamboo forest and 5th-generation Chinese fir sprout forest in north subtropical zone were studied. The distribution of soil, soil factors affecting its availability and the effects of different stands on soil micronutrient content. The results showed that the average contents of available B, Mo and Cu in forest soils in the area were lower than the respective critical values, the average content of available Zn was close to the critical value, and the contents of Fe and Mn were abundant. The distribution of effective trace nutrients in the soil profiles The main soil factors that affect the availability of trace elements are organic matter and available phosphorus. Different stands have a significant effect on soil available trace elements, and the content of available trace nutrients in the soil of Quercus variabilis forest is the highest.2 On behalf of the sprout forest, the lowest, remaining in the forest and close to the basic.