大青山阳坡油松人工林立地质量研究

Site Quality of Pinus tabulaeformis Plantation in Sunny Slope of Daqing Mountains

评价林地质量,是适地适树、科学地进行营造林和预测森林生产力的基础。这项工作直接影响造林的成败和经营目标的确定。本文以呼和浩特市大青山地阳坡油松人工纯林为研究对象,以解析木数据求算油松高生长模型,编制《地位指数表》,以林分基准年龄时的优势木平均高作为进行立地质量分析的指标评价造林立地质量。研究结果表明:呼和浩特大青山阳坡油松的立地质量中优等级占6.7%;中等级占30.0%;劣等级占63.3%,造林立地质量总体较差。

The evaluation on forestland quality is the foundation for forestation and prediction of forest productivity scientifically. Taking the pure plantation of Pinus tabulaeformis in sunny slope of Daqing Mountains as the research object, height growth model of Pinus tabulaeformis is performed and the site index table is compiled by use of the data of analytic trees, the mean height of dominant tree at base year is to evaluate the site quality of forestation. The results show that the site regarded as the index of site quality analysis quality of Pinus tabulaeformis at middle and excellent grade in sunny slope of Daqing Mountains takes up 6. 7% , the one at middle grade takes up 30. 0% , the one at inferior trade takes nn 63.3%. The site mlalitv of forestation is bad ~enerallv.