Chin J Plan Ecolo ›› 1991, Vol. 15 ›› Issue (2): 183-190.
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Zhao Xue-nong
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This paper focuses on the self-regulation of Lithocarpus xylocarpus population, which is one of main dominant species of the mountainous humid evergreen broad-leaf forest in Xujiaba region, Ailao Mountain stituated in the mid-south of Yunnan province (24˚31′–24˚35′N,101˚00′– 101˚03′E). It has been found that the relationship between the population density (D) and the mean plant biomass (B) during the self-thinning can be described as:
B= 1825267.081D-2.8208 (l10≤D≤1051)
where B is in t/stem, D is in stems/ha.
The percentages of importance value of Lithocarpus xylocarpus, Lithocarpus chintungensis and Castanopsis wattii have been regarded as the measure of the niche overlap, which results in a new method to calculate competition coefficient, the final result of competition has been discussed with the Lotka-Volterre equation of competition. The analysis showed that the relative dominance of L. xylocarpus, L. chintungensis and C. wattii are respectively 29.52%, 39.90% and 30.58%. Hence three species can jointly dominate a community.
Zhao Xue-nong. A Preliminary Study of the Regulation and Competition of the Dominant Plant Populations in Xujiaba Region, Ailao Mts Tunnan[J]. Chin J Plan Ecolo, 1991, 15(2): 183-190.
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