摘要
通过研究得出:海子坪天然毛竹林的叶面积指数为5.925 2,其无性系分株的叶面积有随着胸径的增大而增加的趋势,并且随着龄级的增大叶面积逐渐减小的现象。研究还得出:标准竹胸径与竹秆的相对直径(DX)、相对壁厚(ZX)和胸高壁厚Z(D1.3)等结构因子间数学模型为:DX(DX=10.350 7-0.707 4HX)、ZX(ZX=1.097 3-0.071 9HX)和Z(D1.3)=0.991 5D1.30.182 9;整个无性系分株最长竹节在23节左右,无性系分株的节长变化呈现出"短—长—短"的变化趋势;通过相对节长(JX)与节位(JW)的数学模型为JX=-0.185 4JW2+8.125 7JW+5.040 8。
The leaf area index and culm-form structure of natural Ph. pubescens in Haiziping were studied in this paper. The results showed that the leaf area index of natural Ph. pubescens in Haiziping is 5. 952 and the leave area of its elonal ramet was increased with the increase of diameter at breast height （DBH） while decreased gradually with the increase of age - class structure. Taken the DBH of standard bamboo as independent variables and relative diameter of bamboo culm （ Dx ） , relative wall thickness（Zx ）and DBH wall thickness （Z（D1.3）） as dependent variables, the models of Dx （Dx = 10. 350 7 - 0.707 4 Hx）, Zx（Zx = 1.097 3 -0.071 9 Hx） and Z（D1.3） （Z（D1.3） =0.991 5 D1.3^0.1829） were obtained. The longest node of bamboo in the whole population was at about 23th node. The node length of elonal ramet showed a trend as ＂short- long-short＂. The model described the relationship between node length （Jx） and node position （Jw） was obtained as Jx = -0. 185 4 Jw^2 ＋8. 125 7 Jw ＋5.040 8.
出处
《林业科技开发》
2009年第3期44-48,共5页
China Forestry Science and Technology
基金
云南省中青年学术技术带头人后备人才资助项目(编号:2007PY01-17)
中国-欧盟生物多样性保护项目(ECBP)资助(编号:00056784)
关键词
天然毛竹林
无性系
叶面积指数
秆形结构
Natural PhyUostachys pubescens
Clone
Leaf area index
Culm-form structure
