摘要
在云南省思茅松集中分布的4个县市,通过调查30块3～26年生思茅松人工林样地及测定36株标准木,对思茅松人工林的生物量和生产力进行了研究。结果表明:3～26年生林分的生物量为22.39～308.96t.hm-2,其中乔木层、灌木层及草本层生物量分别为7.07～295.74,1.73～52.46和0.78～16.40t.hm-2,枯落物层现存量为0.90～11.00t.hm-2,分别占林分生物量的21.44%～95.72%、2.62%～60.86%、0.39%～31.62%和0.90%～11.00%。随林木的生长,乔木层生物量比例明显增加,灌木层、草本层与枯落物层比例明显降低。乔木层、枯落物层和林分生物量与林龄存在显著的线性正相关,灌木层和草本层生物量与林龄呈不显著负相关。随林龄增加,林分生物量、乔木层生物量和枯落物层现存量的变化规律满足逻辑斯蒂方程。3～26年生思茅松人工林林分的生产力为(9.52±1.31)t.hm-2.a-1,乔木层、灌木层和草本层的生产力分别为(6.29±1.19)、(2.52±0.83)和(0.71±0.31)t.hm-2.a-1。随林龄增长,乔木层生产力呈逻辑斯蒂增长,灌木层和草本层的生产力呈指数函数减小。
A survey of 30 sample plots set up in 3-26-year-old Simao pine （Pinus kesiya var. langbianensis） plantations with 36 destructively sampled trees was conducted in 4 counties in Yunnan where Simao pine plantations are widely distributed. Based on data collected from the survey, biomass, productivity and their dynamics of the plantations were studied. Results showed that biomass for the stands aged 3 - 26 ranged from 22.39 to 308.96 t·hm^-2, of which arbor layer was determined as 7.07 - 295.74 t·hm^-2, shrub layer as 1.73 - 52.46 t·hm^-2, grass layer as 0.78 - 16.40 t·hm^-2, liter-fall as 0.90 - 11.00 t·hm^-2 , accounting for 21.44% - 95.72%, 2.62% - 60.86%, 0.39% - 31.62% and 0.90% - 11.00% respectively. With the increase of stand age, allocation of biomass to the arbor layer increased remarkably while that to the shrub layer, grass layer and litter-fall layer decreased significantly. Significant linear correlations were found between stand age and biomass for the arbor layer, the stand and the litter-fall layer. Biomass of the shrub layer and grass layer exhibited insignificantly negative correlations with the stand age. Logistic models developed by this study could well describe the vafiance in biomass for the stand, arbor layer and litter-fall with increasing stand age. Productivities of the plantations aged 3 - 26 for the whole stand, arbor layer, shrub layer and grass layer were 9.52±1.31,6.29±1.19, 2.52±0.83 and （0.71±0.31 ）t·hm^-2·a^-1 respectively. With the increase of age, productivity for the arbor layer increased remarkably following a Logistic model while the oroduetivity for shrub laver and grass laver declined exponentially.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2010年第8期36-38,共3页
Journal of Northeast Forestry University
基金
云南省应用基础研究(2007C240M)
云南省技术创新人才培养项目(2008PY085)
云南省科技攻关计划项目(2004NG05-02)
国家林业局"948"项目(2006-4-67)
关键词
思茅松人工林
生物量
生产力
Pinus kesiya var. langbianensis plantations
Biomass
Productivity
