不同类型沙松人工林产量及生长预测

Prediction for the yield and the growth of different types plantations of Abies holophylla

文章对1963～1964年在白石砬子自然保护区营造的沙松纯林、沙松-落叶松-阔叶混交林及沙松-阔叶混交林等不同林型人工林的固定标准地进行了产量观测,通过计算机拟合运算优化出指数函数y=aebx,对各种类型沙松人工林进行了生长预测。结果表明,各类沙松人工林均有良好的发展前途,到55年生主伐时可获得可观的木材产量;除沙松-落叶松混交林外,其他几种混交林型材积生长量差异不显著;结合生态群落结构和生物多样性因素分析得出:在东部山区的适宜地区应大力推广培育沙松-落叶松-阔叶混交林等针阔混交林模式。

The fixed plots have been settled to measure the yield of different plantations of Abies holophylla, which were planted during 1963 and 1964 at Baishilazi natural reserve. Based on the yield measurement and simulating calculation by computer, an index function was given as follow: y=ae~bx. The index function can be used to predict the growth of all kinds of Abies holophylla plantations. The prediction shows that all Abies holophylla plantations have good developing future and a considerable timber yield can be obtained at the cutting time of 55 years old. The differences between the volume growths of the mixed stands expect Abies holophylla-larch forest isn't notable. A suggestion was given from the analysis on community structure and biological diversity that the mixed patterns of Abies holophylla-larch-broadleaf plantations should be popularized greatly at proper region in east Liaoning province.