| 南京紫金山毛竹平均胸径与立株度之间的关系 |
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| 引用本文： | 王平,林树燕,范婷婷,张玉,李芳,凡美玲,方水元,王福升,董丽娜,时培建.南京紫金山毛竹平均胸径与立株度之间的关系[J].安徽农业科学,2018,46(7):106-108. |
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| 作者姓名： | 王平 林树燕 范婷婷 张玉 李芳 凡美玲 方水元 王福升 董丽娜 时培建 |
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| 作者单位： | 南方现代林业协同创新中心,南京林业大学竹类研究所,江苏南京210037;中山陵园管理局,江苏南京,210014 |
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| 基金项目： | 国家自然科学基金青年基金项目，江苏高校优势学科建设工程项目，江苏省林业三省工程项目 |
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| 摘 要： | 在紫金山毛竹纯林选取30个10 m×10 m的样地,调查每株毛竹个体胸径的大小,使用正态分布函数和威布尔分布函数判定其分布类型,先对毛竹平均胸径和立株度数据对数转置后进行线性回归,探究毛竹平均生物量和竹林密度是否遵从自疏法则。结果表明:紫金山毛竹胸径符合威布尔分布函数,毛竹的平均胸径服从自疏法则,当立株度增加时,毛竹平均胸径趋于减少。从立株度和平均胸径关系综合来看,当紫金山毛竹平均胸径为9.5 cm,竹林密度为3 276株/hm2时,紫金山毛竹林布局合理,具有较高的观赏价值。
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| 关 键 词： | 分布函数 经济价值 线性回归 毛竹 自疏法则 |
Relationship between the Mean Diameter of Breast Height(DBH)and the Number Per Unit Area of Moso Bamboo Stands in Zijin Mountain |
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| Abstract: | In this study,30 sites each 10 m ×10 m in the moso bamboo pure forests were investigated in Zijin Mountain,and the DBH of ev-ery bamboo was measured.The Normal and Weibull distribution functions were used to judge the distribution type of pooled bamboos' DBHs. After log-transforming the data of mean DBH and corresponding density,the linear regression to examine whether the DBHs of moso bamoo fol-low the self-thinning law was used.The results showed that the DBHs of moso bamboo in Zijin Mountain follow the Weibull distribution func-tion,with a median of 9.1 cm.There was a significant self-thinning relationship between the mean DBH and spatial density(namely the num-ber per unit area),that was,with spatial density increasing,the mean DBH continuously decreases.When the mean DBH was predicted to be 9.5 cm, and the spatial density reached 3 276 hm2.Such a standard of density arrangement was recommended in this area because bamboo was then of high ornamental value based on the trade-off between the number per unit area and the mean DBH. |
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