摘要
对平均年龄为40a的天然赤松林进行了生物量的研究.结果表明:当密度为1500～2000株/hm^2时;赤松林总生物量为127.389t/hm^2,接近最大值.其中乔木层为127.043t/hm^2;灌木层为0.178t/hm^2;草本层为0.168t/hm^2.此时,乔木层净生产量为17.117t/(hm^2·a).随着密度梯度的变化、乔木层、灌木层、草本层生物量以及乔木层净生产量均发生有规律的变化,而且,乔木层生物量与灌木草本生物量之间还具有互补关系.
The biamass of 40 years old natural Pinus densiflora stands were measuredby different stand densities. The amount of biomass was close to a maximumwhile the stand density was 1500-2000 stems/hm2. The total amount of biamasswas 127. 389 t/hm2, in which that in tree layer, shrub layer and herb layer was127. 043 t/hm2. 0. 178 t/hm2 and 0. 168 t/hm2 respectively. The net productivity oftree layer was 17. 1 17 t/ hm2/yr. The amounts of biomass in tree, shrub and herblayers and the average net productivity had a regular change with densitygradient. With Change in density gradient, there was a complementary relationbetween tree and shrub in biomass.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1996年第5期24-30,共7页
Journal of Northeast Forestry University
基金
国家自然科学基金资助
关键词
赤松林
密度
生物量
净生产量
Natural forests
Pinus densiflora
Density
Biomass
Net productivity
