摘要
对20年生马尾松人工林生物量的研究表明,全林生物量38.42吨/公顷,间伐后年生产量6.49吨/公顷林木根量5.73吨/公顷,相对生长率19.0％,净同化率0.253公斤/米~2·年,生产力水平偏低。林分抚育间伐后,林木的生物生产力得到提高。建立了林木各器官干重与直径树高的8个相关方程,相关系数均在0.92以上。通过叶面积及其生长函数分析,林分密度过高,生长速率降低,建议及时合理地调节林分密度。
20 years of researches on the biomass of artificial Masson' s pine (pinus massoniana) forest have shown that its whole-forest biomass is 38. 2 t/ha. After intermediate cutting,the annual production of Mass6n' s pine forest is 6. 49 t/ha and the root system weighs 5. 73 t/ha. It has a relative increment percent of 19% and a net assimilation ratio of 0. 253 kg/(m2 ·a). As a result its productivity is on the low side. The biological productivity of forest trees has increased to some extent after intermediate cutting was done to stand. Eight correlative equations have been- established between the dry weight of each organ of forest trees and the diameter-height,and their correlative coefficients are all more than 0. 92. From the analysis of the leaf area and the growth function it can be seen that its growth rate will decrease if stand has an excessively high density.
出处
《四川林业科技》
北大核心
1992年第2期29-34,共6页
Journal of Sichuan Forestry Science and Technology
关键词
生物量
间伐
马尾松
Masson' s pine
intermediate cutting
biomass
