笑山林场天然阔叶混交林资源现状

对新青林业局笑山林场的天然阔叶混交林进行了抽样调查，在树种组成方面对物种丰富度、树种组成指数、树种单调度、群落均匀度等指标做了详细的分析，采用倒J形曲线对林分的株数和径阶进行了拟合，同时利用理查德方程对林分的生长情况进行模拟得出结论：现有天然阔叶混交林阔叶多，针叶少；低价树种多，珍贵树种少；分布不均匀；主要树种的连年生长量呈现下降趋势，林木生长缓慢，生长潜力不大。应该对其进行人为的抚育更新，调整树种组成和林分结构，构建以针叶为主的针阔异龄复层混交林。

The Resources of Natural Broad-leavedmixed Forest of Xiaoshan Farm

Sample survey on the natural broad - leavedmixed forest of Xiaoshan farm of Xinqing forestry bureau, detailed analysis wasmade at tree species composition with species richness, tree species composition index, species single scheduling and community evenness, the number of trees and diameter class of the stand were fitted with inverted J - shaped curve, and the growth of the stand was simulated by Richards Equation, the conclusion was showed that： there weremore broad -leaved and less conifer, more cheap and less precious, the species was species was showed downward trend, the stand a coniferous coniferousmixed forests of different distributed uneven, the annual increment of themain tree had slowly growth and little potential, so we should build age by changing species composition and stand structure with artificial update.