森林抚育对华北落叶松生长影响的调查与分析

为研究森林抚育措施对华北落叶松生长的影响,在宝鸡市马头滩林业局选择华北落叶松人工纯林作为研究对象,对经过抚育措施后影响华北落叶松生长进行了调查与分析,结果表明:1、华北落叶松林分进行抚育后平均胸径和生长率都是增加。 2、华北落叶松林分进行抚育后平均胸径和生长率增长的年数不同,在抚育后2-3年达到了最大值,林分进行抚育后生长率变化规律是先增加后下降,呈正态曲线的变化趋势,说明其生长速度由于生长空间增大而加快。

Effects of forest tending on larch growth in North ChinaInvestigation and analysis

for studying the forest tending measures on north China larch growth, the influence of the forestry bureau in baoji pier beach selection larix pricipis-rupprechtii artificial pure forest as the research object, after tending measures to affect the growth of north China larch has carried on the investigation and analysis, the results show that: 1, after the north China larch forest for tending average diameter at breast height and growth rate are increased.2. The average DBH and growth rate of North China Larch stand after tending were different in the number of years, and reached the maximum in 2-3 years after tending. The growth rate of stand after tending was firstly increased and then decreased, which showed a normal curve trend, indicating that its growth speed was accelerated due to the increase of growth space.