无样地法在暖温带落叶阔叶林群落调查中的应用

本文以秦岭太白山自然保护区内锐齿栎(Quercus atiena var. acuteserrota)为优势的暖温带落叶阔叶林为对象,采用与大样地(0.5公顷)实测结果的比较,研究了无样地法中的中点四分法取样技术在暖温带落叶阔叶林中的应用。认为中点四分法取样技术,具有较高的精度和效率,可适用于暖温带落叶阔叶林。并用种点数曲线确定了暖温带落叶阔叶林的最小点数为15个。

APPLICATION OF PLOTLESS SAMPLING HETHOD TO THE WARM-TEMPERATE DECIDUOUS BROAD-LEAVED FORESTS

Two methods of vegetation surveying, the point-centred quarter method and plot method, were used in the investigation of the warm-temperaet deciduous broad-leaved forest of Taibai Natural Reserve on Qiuling Mountains, Shaanxi Province,, China.The forest is dominated by Querous attena var. acuteserrata. By comparison of the results obtained through pointcentred quarter method, with the results obtained through plot method (<0.5ha), it has been shown that the point-centred quarter method has higher precision and efficiency than plot method as judged by species composition, range corelation coefficient of important. value, community coefficient. The"species-point-number curve is indicated that in the warm-temperate deciduous broad-leaved forest 15 centre points will be sufficient for vegetation surveying.