摘要
从南岭山脉以南的各毛竹产区中收集１３３０块高产林标准地，分别调查各度竹株数、胸径等测树因子与林分、环境因子，以用材林的竹秆产量，笋用林的笋产量为因变量，建立了产量模型：材用林Ｙ１＝－６２６９５．２４５＋６．５４１３Ｎ＋７０１２．５１９５Ｄ＋８．４５４８Ｘ１＋１１．０８７０Ｘ２＋１４．１５２０Ｘ３＋８．９９６９Ｘ４＋１４．５１５６Ｘ５笋用林Ｙ２＝６９７．５５６９＋０．２０５２Ｎ＋１．８５１４Ｄ－０．６４１４Ｘ１＋１．２４９３Ｘ２＋０．７６３６Ｘ３＋０．３７９０Ｘ４－０．８８３３Ｘ５（Ｒ１＝０．９８，Ｒ２＝０．９６）并结合生产要求，提出约束条件八组。应用该模型研究毛竹林最优化年龄结构，可以得到不同竹林质量、立竹量、立地条件、经营水平下最适宜年龄结构。能显著地提高林分的竹材和笋产量。
The numbers of bamboo stem at different ages and the diameter at breast hight ( DBH ) which are the elements for measuring a tree, the standing bamboo amount in a bamboo stand, and the environment of the bamboo stand were investigated in 1330 bamboo high yield plots collected from the bamboo production areas in Nanlin mountains. Taking the bamboo stem yield of a timber stand and the shoot production of a bamboo shoot stand as the dependent variables, the following yield models were established. For timber stand Y 1=-62695.245+6.5413N+7012.5195D+8.4548X 1+11.0870X 2 +14.1520X 3+8.9969X 4+14.5156X 5 For shoot stand Y 2=697.5569+0.2052N+1.8514D-0.6414X 1+1.2493X 2 +0 7636X 3+0.3790X 4-0.8833X 5 Eight restricted conditions were suggested in combination with the need of production, these models were used to optimize age structure of bamboo stand under different quality, density, site condition and level of management. The results showed that the models could increase yield of bamboo and shoots significantly.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1998年第3期32-39,共8页
Scientia Silvae Sinicae
基金
福建省科学技术委员会资助
关键词
毛竹
线性规划
年龄结构
产量
Phyllostachys pubescens, Linear programme, Age structure, Yield
