摘要
本文以兴安盟牛汾台林场兴安落叶松人工林为研究对象,在典型样地内选择标准木做树干解析,研究1 312株/hm2、1 552株/hm2、1 632株/hm23种密度林分兴安落叶松人工林的树高、胸径、材积差异和林分的蓄积差异。结果表明,三种密度兴安落叶松人工林胸径总生长量在25到30a间差异开始显现,呈现出胸径随密度升高而降低的规律.平均生长量在15a时达最大值;树高总生长量基本相似。平均生长量和连年生长量在10a时达到最大值;材积总生长量、平均生长量与密度呈负相关,其差异在15到30a间随树龄的增加而逐渐增大;林分蓄积量随着密度的增大而降低.经过综合比较得出,1 312株/hm2为兴安落叶松人工林合理经营密度。
By the method of sample trees stem analysis,this paper studied the difference in tree height、diameter at breast height and volume among Larix gmelini plantations with the densities of 1 312,1 552,and 1 632 stems/hm2 in the Niufentai of Xing＇an League.The results showed that,among the three densities,the difference in total increment of BDH appear different at the age of 25 to 30,and the diameter at breast height decreased with the increase of density.At the 15th year,the mean increment of DBH reached maximum;The total increment of tree height was basically similar.The mean increment of tree height and annual increment of tree height reached maximum at 10th year.The total increment of volume and the mean increment of volume have negative correlation with density,and the difference increased with the increasing time at the age of 15 to 30.With the increased of density,the stand volume decreased.After comperehensive comparison,we can conclude that the reasonable density of Larix gmelini plantations was suggested to be 1312 stems/hm2.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2013年第2期65-68,共4页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
中央财政林业科技推广示范跨区域重点推广项目([2010]TK11)
关键词
兴安落叶松
人工林
密度
树干解析
生长量
Larix gmelini
plantation
densities
sample trees stem analysis Increment
