油松、侧柏人工幼林质量与林地土壤肥力的研究

Studies on Young Stand Quality and Forest Soil Fertility of Chinese Pine and Arborvitae

根据生长势将油松、侧柏的幼树划分成5种类型,以幼林中健壮幼树的百分比来评价林分的质量。测定林分生长量、土壤水分—物理性质和氮、磷、有机质含量。结果表明:侧柏幼林的质量和生长量均大于油松幼林,苗龄及育苗方式对幼林质量的影响不大。侧柏林地土壤的水分—物理性质优于油松林地。油松、侧柏的生长速度强烈地影响着林地土壤肥力状况,土壤肥力的高低与林木的生长速率呈反比。

Evaluates the stand quality by percent of vigorous young trees of Chinese pines and Chinese arborvitae. The physical properties of the forest soil and the nutrient contents of soil and needles were determined. The Young stand quality and growth increment of Chinese arborritae are higher than those of Chinese pine. The cultural practices and ages of seedlings have no great effects on young stand quality. The water and physical property of forest soil from Chinese pine stand is worse than that from Chinese arborvitae. The forest soil fertility has a negative relation with the tree growth rate.