摘要
以秦岭北坡栓皮栎为研究对象,采用选择典型样株与随机采样的方法,研究不同径级下厚皮和薄皮2种类型栓皮栎软木的差异、软木质量变化的趋势,及周皮与树体生长的关系等。研究结果表明:栓皮栎不同部位(阴面和阳面)软木厚度存在极显著差异。对比2种类型软木密度、硬度、皮层厚度等可以得出厚皮类型软木优于薄皮类型,2种类型栓皮栎胸径在10～20cm的软木质量最差;2种类型栓皮栎周皮厚度与树体生长存在极显著的正相关性,可用胸径代替年龄作为反映周皮厚度的重要度量指标。软木厚度越大软木质量也相对越好,厚皮类型栓皮栎软木在胸径10～30cm时速生,胸径40cm后增长迟缓,而薄皮类型软木以较慢的速度缓慢增长。在栓皮栎林的经营和树皮采剥中,应该对胸径为30～40cm的厚皮类型栓皮栎及时进行周皮采剥,而尽量避免对胸径小于20cm的薄皮类型栓皮栎进行剥皮,同时可以适当对栓皮栎林进行间伐,增加林窗的数量,从而增加光照、温度等环境资源的异质性,为栓皮栎软木的发育生长提供有利的条件。
In order to understand the characteristics of cork qualities of Q. variabilis, and to provide scientific base for managing the forests, the differences of two types of Q. variabilis with different periderm thickness, distributed in sunny slope of North Slopes Qinling Mountains, were studied at the various DHB stages. Totally 40 Q. variabilis trees were used in this study. The results showed： There was extremely significant difference in the periderm thickness between sunny side and shady side of the stems. The cork of the thick type Q. variabilis was better than the thin type’s. The cork of the two types of Q. variabilis was worst at 10～20 cm DBH stage. There was an extremely significant and positive correlation between periderm thickness and tree growth. Stepwise regression analysis showed that DBH could replace age used as an important index for estimating the periderm thickness. With the increase of cork thickness the cork quality was relatively better in the two types. The growth of the thick type was faster during 10～30 cm DBH stage, and then slowed down after 40 cm DBH. In the contrast, the growth of the thin type was always slow. In the future, barks of the thick type should be stripped timely when DBH arrives at 30 cm, and the thin type should avoid stripping when DBH is less than 20 cm. Meanwhile, appropriate thinning techniques should be used to improve the number of forest gaps, thereby increasing the heterogeneity of light, temperature and other environmental resources, and providing favorable conditions for growth and development of the cork of the Q. variabilis.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2013年第4期62-69,共8页
Scientia Silvae Sinicae
基金
林业公益性行业科研专项(201004011)
国家自然科学基金项目(30872018)
陕西省科学重点基础研究项目(2009JZ005)
关键词
栓皮栎
周皮
软木
胸径
相关分析
回归分析
Q. variabilis
periderm
cork
DBH
correlation analysis
regression analysis
作者简介
张文辉为通讯作者。
