立地因子对松江河林业局森林生态功能等级的影响

Effects of Site Factors on Forest Ecological Function Grade in Songjianghe Forestry Bureau

本文利用松江河林业局森林资源调查小班数据库,分析了不同立地因子对乔木林小班森林生态功能等级的影响。结果表明:在不同坡位上,平地森林生态功能等级为“好”的小班数量最多,所占百分比为52.6%,其次为中部和下部。在不同坡向上,西北坡森林生态功能等级为“好”的小班数量最多,所占百分比为53.3%;半阴半阳坡森林生态功能等级为“好”的小班数量最多,所占百分比为51.6%,与阴坡和阳坡差距较大。随海拔等级的升高,森林生态功能等级为“好”的小班数量所占百分比逐渐升高。

In this paper,the effects of different site factors on the ecological function grade of arbor forest subcompartment were analyzed by using the database of forest resource survey in Songjianghe Forestry Bureau.The results showed that in different slope positions,the percentage of the subcompartment with the ecological function grade of"good"was 52.6%in flat slope,that was the maximum,followed by the middle and lower part.In different slope aspects,the percentage of the subcompartment with the ecological function grade of"good"was 53.3%in the northwest slope,that was the maximum.The percentage of the subcompartment with the ecological function grade of"good"was 51.6%in the semi-shady and semi-sunny slope,that was the maximum and was significantly different from the shady and sunny slopes.The percentage of the subcompartment with the ecological function grade of"good"increased with the elevation level.