摘要
【目的】了解天然云南松个体和种群生物量动态变化规律,为培养优质丰产云南松林提供参考。【方法】采用样地编年序列法,并利用生长方程计算不同林龄云南松的个体生物量、种群生物量、地上生物量和地下生物量的变化规律。【结果】个体生物量在26龄前增长缓慢,26龄后增长速度较快;种群生物量在4龄前增加较快,5～7龄增长缓慢,8～9龄直线增长,10～20龄缓慢增加,21龄以后增长较快;在4龄前,地下生物量所占比例较大,并随着林分年龄的增加逐渐降低,最后趋于稳定;4龄后,地上生物量占个体生物量的比例较大,占主导地位。【结论】云南松个体生物量、种群生物量、地上生物量和地下生物量均随林龄增加而增加。种群生物量前期主要受密度影响,后期主要受个体生物量影响;地上生物量与地下生物量分配与云南松生态适应对策有关,在幼苗期生物量优先向地下分配。
[Objective]The dynamics of individual and population biomass of natural Pinus yunnanensis were studied in order to provide references for maintaining high yield and quality forest of Pinus yunnanensis.[Method]The methods of plots arranged with age and growth equation were used to calculate the individual,population,aboveground and underground biomass of Pinus yunnanensis.[Result]The individual biomass developed slowly before 26 a,followed by intense increase.The population biomass showed initial rapid increase before 4 a,and then slowed down,linearly increased and showed low growth during 5-7 a,8-9 a and 10-20 a,and rapidly increased again after 21 a.The underground biomass accumulated in high proportion before 4 a,but decreased with increasing stand age and attained a final stable status.The aboveground biomass accounted for larger proportion of individuals after 4 a.[Conclusion]It has been observed that individual,population,aboveground and underground biomass increase with increasing stand age.Biomass is mainly affected by density during earlier stage and by the individual biomass during later stage.The distribution of aboveground and underground biomass is related to the adaptation strategies of Pinus yunnanensis.
出处
《南方农业学报》
CAS
CSCD
2011年第10期1255-1258,共4页
Journal of Southern Agriculture
基金
国家林业局科技支撑项目(TBKJ2003-09)
云南省学术与技术带头人后备人才基金项目(2005PY01-20)
云南省重点建设学科项目(500018)
关键词
云南松
天然林
生物量
变化规律
Pinus yunnanensis
natural forest
biomass
dynamics
