摘要
通过对样地水曲柳天然林的各器官生物量的测定和化学元素分析,研究了生物生产力及营养元素的积累与分布规律。结果表明:林龄为43a的水曲柳天然林乔木层地上部生物量为135.749 t/ha,其中干材为79.891 t/ha,干皮为13.191 t/ha,大枝(未着生叶)为23.961t/ha,小枝(着生叶)为12.830t/ha,叶为5.877 t/ha;乔木层地上部平均净初级生产力为4.539 t/ha·a,其中叶为1.519t/ha·a,仅次于干材;近期(5a)平均净初级生产力为8.390 t/ha·a,其中叶为4.012 t/ha·a,是器官之中最高者;地上各器官营养元素含量因器官、元素而异,但尤以叶的含量最高。根据分析结果,从植物营养学角度出发,提出了以发展针叶树为主的“栽阔养针”的观点,对生产实践具有重要指导意义。
The accumulation and distribution rule of productivity and nutrient element were studied by determining the biomass and chemical element in different organs above ground of sample trees. The result showed that the biomats of trees above ground in age of 43 natural manchurian ash is 135.749 t/ha. bole weight 79.891 t/ha, bark weight 13.191 t/ha, big shoot (without leaf)23.961 t/ha, little shoot(with leaf)12.830t/ha, leafe weight 5.877t/ha;average net primary productivity of trees above ground is 4.539 t/ha.a, leaf 1.591 t/ha.a, is only next to bole; average net primary productivity of recent 5 years is 8.390t/ha·a,leaf 4.012t/ha.a, is the highest among the organs. Nutrient element content is different in organs, but it is highest in leaf. It is of great significance that planting conifer, protecting broadleaf from view of plant nutrient.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1989年第4期1-9,共9页
Journal of Northeast Forestry University
关键词
水曲柳
天然林
生物量
生产力
Manchurian ash
Natural forest
Biomass
Productivity
Nutrient element
