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根据浙江天童次生木荷林抚育42 a的永久样地1972年、1983年和2014年3次调查数据,分析木荷林中主要树种的种群动态。结果显示:木荷林抚育后随着林龄增加样地内胸径≥5 cm的成树密度在3次调查中呈逐年递减趋势,而林分胸径断面积和蓄积量呈逐年增加趋势。林分蓄积年生长率为2.4%。林分优势种为木荷、栲树和石栎种群,优势度明显;且木荷、栲树种群结构为单峰曲线,石栎、浙江新木姜子等为逆“J”型,更新层中里白独占优势。在3次调查中,木荷林的1~5级木分化等级范围由1972年的3级扩展成2014年的5级,分化明显。其经营策略可采用近自然林经营技术,将里白连续割除2 a,开展森林综合抚育;培育目标树结实更新;清理枯立木、风倒木和干扰木;在“林窗”中少量补植地带性顶级阔叶树种。
According to the data of three surveys in 1972, 1983 and 2014, which were the permanent sampling plots for the 42-year-old nurturing of Muqin of Zhejiang Tenth, the population dynamics of the main tree species in the wood were analyzed. The results showed that the density of trees with the diameter of more than 5 cm in diameter increased after years of tending with the increase of age. The density of cross-sectional area and volume of the stands varied from year to year in three surveys. Stand growth rate was 2.4%. The dominant species of forest stand were Schima superba, Castanopsis fargesii and Quercus acutissima populations with obvious dominance. The structure of Schima superba and Castanopsis fargesii were single peak curve, White in the update layer dominate. In the three surveys, the wood grades 1 to 5 of Mu Hulin ranged from 3 grades in 1972 to 5 grades in 2014, and the differentiation was obvious. Its business strategy can be used near natural forest management techniques, the continuous removal of the white 2 a, to carry out comprehensive forest tending; cultivate the target tree strong update; clear the dead wood, the wind down the wood and interference wood; in the “Gap” a small amount of fill Top zonal broadleaf species.