摘要
通过对秦岭林区中龄次生林抚育间伐保留密度进行了长期定位研究,提出了林分组成为4栎3桦3山杨的混交次生林的抚育合理密度。研究结果表明:该林分的合理保留密度为1500株/hm2,在此密度下,树高年生长量的变幅为0.11m,胸径年生长量的变幅为0.09cm,蓄积的年增长量为17.00m3/hm2,这些指标在各保留密度中都达到了最大值。
In a long-term experiment at a fixed site, different reserve densities in intermediate cutting in secondary forests in the Qinling Mountains were compared. The advisable density in tending cutting was recommended for the mixed secondary forests with a stand composition of 4 Quercus + 3 Betula + 3 Populus davidana. A reserve density of 1 500 trees/hm^2 was considered to be optimum, giving the maximum annual growth in tree height (0.11 m), DBH (0.09 cm) and standing stock (17.00 m^3/hm^2).
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2003年第6期546-549,共4页
Journal of Southwest Agricultural University
基金
陕西省科委资助项目
关键词
次生林
保留密度
林分生长
抚育
secondary forest
reserve density
stand growth
