杉木大龄种子园不同改造方式的中短期经济效益评析

发布时间：2017-12-28 13:41

本文关键词：杉木大龄种子园不同改造方式的中短期经济效益评析　出处：《林业经济问题》2017年01期 　论文类型：期刊论文

【摘要】：以广西全州县咸水林场1987年嫁接的杉木大龄种子园为研究对象,采用静态与动态相结合的分析方法,依据不改造、截干改造和更新重建3种改造方式5年内实际产生的经济效益,对3种改造方式进行比较分析,并预测重建种子园达盛产年份期间各模式的经济效益。结果表明:在国家持续投入和实现种苗一体化的情况下,杉木大龄种子园即使超过一般认为的使用寿命,但其继续经营所产生的经济效益仍然表现良好,中短期的益本比均大于1;对大龄种子园进行更新重建,由于前期资金投入大,短期的经济效益表现并不理想,但至第12年后可收回投资,累计净现值开始出现正值,内部收益率为13.3%,至盛产年份期间其益本比1.8以上;截干改造模式的中短期经济效益表现均比较理想,改造后第4年即可收回投资,短期内部收益率达33.4%,中期益本比可达2.39,是大龄杉木种子园改造过渡期间的一种理想方式。
[Abstract]:In older Chinese Fir Seed Orchard in Guangxi County saltwater state forest farm in 1987 grafting as the research object, using the method of analysis of static and dynamic combination, based on the transformation, transformation and renewal and reconstruction of the stem cutting 3 kinds of transformation within 5 years of actual economic benefits of 3 kinds of transformation in comparative analysis and prediction of seed reconstruction during the year in the park up to the economic benefit of the mode of. The results showed that: in the country continued to invest and realize the integration of the Chinese fir seedling seed orchard, older even more than the general view of life, but its continued operation caused economic benefit is still good performance in the short-term benefits of this ratio were higher than 1; the older seed orchard renewal and reconstruction, due to pre funding. The economic benefits of short-term performance is not ideal, but to twelfth years to recover the investment, the cumulative net present value began to appear positive, internal rate of return is 13.3%, to the rich year during the benefit cost ratio above 1.8; in the short-term economic performance stem cutting transformation mode were ideal, after the transformation of fourth years to recover the investment, short-term inside the yield reached 33.4%, the medium-term benefit cost ratio up to 2.39, is an ideal way for older Chinese fir seed orchard transformation during the transition period.
【作者单位】：广西林业科学研究院用材林研究所;广西优良用材林资源培育重点实验室;广西杉木良种培育中心;全州县咸水林场;
【基金】：广西林业科技项目(桂林科字[2014]01号) 广西优良用材林资源培育重点实验室自主课题(15-A-02-03)
【分类号】：F326.25;F302.6
【正文快照】： 杉木是中国重要的商品树种,在林业产业建设中的作用举足轻重。据第八次全国森林资源清查结果,中国杉木林面积1 096万hm2,蓄积7.26亿m3,分别占中国主要优势树种面积和蓄积的6.66%和4.91%[1]。为了获得优良种质、提高营林成效,众多学者对种子园营建和丰产技术开展了大量研究,尤

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