摘要
天目山毛竹个体各器官的生物量分配依次为：竿62.9%、篼13.6%、枝8.8%、鞭6.9%、根4.4%和叶3.6%。胸径与基径、竹竿和总体生物量之间都有着很高的相关性,而基径则与竹篼有着极高的相关性。总体看来,胸径和基径与地上部分各器官有着较好的正相关性,而与地下部分的竹鞭和根没有什么相关性。用胸径与基径对各器官生物量的回归拟合的显著度都在0.9以上,说明通过对毛竹胸径或基径的测量就可较准确的推知各器官生物量。毛竹各器官含水量依次为：根〉鞭〉篼〉竿〉枝〉叶;即越靠近叶,则水分含量越低。竹叶N、P含量居首位,而竹竿的N、P含量最低,但其有机碳的含量最高。毛竹种群的有机碳储量为34.483 t.hm-2,其中地上部分碳储量为26.478 t.hm-2,地下部分碳储量为8.005 t.hm-2。毛竹的碳储量相当于每公顷固定了大气CO2126.438 t。而地上与地下部分N的总贮量约为0.306 t.hm-2,P的总贮量约为0.017 3 t.hm-2。
The distribution pattern of Phyllostachys heterocycla cv.pubescens natural population in 1 year is uniformed,and that in 3~10 years is Poisson random distribution,and that over 10 years is negative binomial clumped distribution.In general,the distribution pattern of the total population is uniformed.It has indicated that the development trend of distribution pattern is from uniform to random to clump.Biomass allocation proportion of organs in turn is cane 62.9%,culm 13.6%,branch 8.8%,rhizome 6.9%,root 4.4% and leaf 3.6%.As to Pearson correlation coefficients,there is a sound positive correlation between DBH and cane and total biomass,as well as basal diameter and culm.In a word,DBH and basal diameter have a considerable positive correlation to overground part organ biomass,but are little correlated to underground rhizome and root.Water content of each organ order is rootrhizomeculmcanebranchleaf,i.e.the more close to leaf,the less water content it has.Leaf has the highest N and P contents,however,cane has the lowest,along with the highest C content.Carbon storage of Phyllostachys heterocycla cv.pubescens natural population is about 34.483 per hectare,along with 26.478 per hectare in the overground part and 8.005 per hectare in the underground part.Carbon storage in population roughly amounts to fixing 126.438 t CO2 per hectare from atmosphere.Moreover,total N storage（including overground and underground） is 0.306 per hectare,with 0.0173 per hectare total P storage.
出处
《四川林业科技》
2010年第4期29-33,共5页
Journal of Sichuan Forestry Science and Technology
基金
国家科技支撑专题:长江上海四川盆地中低山丘陵区(阆中)水土保持型植被建议技术研究与示范(2001BA51080105)
四川省林业重点工程效益检测及评价技术研究资助项目(研究04-13)
关键词
生物量结构
毛种种群
天目山
Biomass structure
Phyllostachys heterocycla cv.pubescens population
The Tianmu Mountain
