中南林學(xué)院學(xué)報(bào) |
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齊新民 丁貴杰 摘 要:依據(jù)馬尾松人工林生長(zhǎng)收獲模型系統(tǒng),在數(shù)百個(gè)技術(shù)上可行的馬尾松紙漿材林栽培模式中,以NPV和IRR最大為主要目標(biāo)進(jìn)行選優(yōu),并用邊際分析法選出14、16、18指數(shù)級(jí)經(jīng)濟(jì)上最優(yōu)的初植密度,最后用邊際分析法確定最優(yōu)初植密度的最優(yōu)主伐年齡.結(jié)果表明:相對(duì)于建筑材林而言,馬尾松紙漿材林要取得較好的經(jīng)濟(jì)效益,應(yīng)適當(dāng)密植,主伐年齡應(yīng)相應(yīng)提前;每公頃最優(yōu)初值密度為4000~5000株,最優(yōu)主伐年齡為15~17a. Economical Analysis of Optimal Culture Density of Masson Pine Plantation for Pulp QI Xin-ming(Forestry Department of
Guizhou University, Guiyang 550025, Guizhou, China) Abstract:Based on the growth harvest model system of Masson pine plantaiton,the
best economical planting densities at 14,16 and 18 site index were selected
aiming at the biggest NPV and IRR among several hundreds of culture models of
Masson pine plantation for pulp,and the optimal age of final cutting was
determined by using the marginal analysis.The results showed that Masson pine
plantation for pulp should select bigger density compared with that for
timber,and the final cutting age should be earlier;The best planting desity was
between 4 000~5
000 trees/hm2, and cutting age 15~17 a. |
基金項(xiàng)目:本研究為國(guó)家“九五”重點(diǎn)攻關(guān)課題“馬尾松紙漿用材樹種良種選育及培育技術(shù)研究”(96?011?01?01)及貴州省“九五”科技攻關(guān)項(xiàng)目“馬尾松紙漿用材林高產(chǎn)、高效栽培利用技術(shù)研究”部分內(nèi)容. 作者簡(jiǎn)介:齊新民(1956-),男,河南人,副教授,主要林業(yè)經(jīng)濟(jì)方面的科研和教學(xué)工作. 作者單位:齊新民(貴州大學(xué)林學(xué)系,中國(guó)貴州 貴陽(yáng) 550025) 丁貴杰(貴州大學(xué)林學(xué)系,中國(guó)貴州 貴陽(yáng) 550025) 參考文獻(xiàn): [1]丁貴杰.馬尾松人工林生長(zhǎng)收獲模型系統(tǒng)的研究[J].林業(yè)科學(xué),1997,33(SP.1):57-66. 收稿日期:2001年4月10日 出版日期:2001年6月1日 |