摘要:
[目的]分析擎天树与桉树萌芽林混交造林的效果及经济效益,为擎天树和桉树混交造林模式推广提供参考依据.[方法]采用固定样方方法连续3年测量擎天树与桉树萌芽林混交林的生长量,同时采用财务净现值法对造林投入和产出进行经济效益分析.[结果]5年生擎天树与桉树萌芽林混交林中擎天树平均树高和胸径分别为3.31 m和3.04 cm,年均生长量分别为0.66 m和0.61 cm;桉树平均胸径、树高和材积的生长量分别为15.63 cm、17.79 m和99.00 m3/ha;混交林投资项目第5年的财务净现值为630.00元/ha,财务内部收益率为12.57%,年均利润达3774.00元/ha,年均利润率为10.61%.[结论]从造林效果和经济效益两方面考量,擎天树与桉树萌芽林混交是较理想的混交造林模式.
关键词:
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擎天树
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桉树
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混交林
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造林效果
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效益分析
Abstract:
[Objective]In present study, afforestation effects and economic benefit of Parashorea chinensis-Eucalyptus mixed plantation were analyzed in order to provide reference for promotion of the mixed palantation model. [Method]Fixed quadrate method was adopted to measure the growth of P. chinensis -Eucalyptus mixed plantation for three consecutive years. Meanwhile, afforestation costs and benefits were analyzed using net present value method. [Result]In five-year-old P. chinensis-Eucalyptus mixed plantation, average tree height of P. chinensis was 3.31 m, average annual growth of tree height was 0.66 m; average diameter at breast height(DBH) was 3.04 cm, and average annual growth of DBH was 0.61 cm. In terms of Eucalyptus, average annual growth of DBH was 15.63 cm,that of tree height was 17.79 m and that of volume was 99.00 m3/ha. In the 5th year of investment, financial net present value was 630.00 yuan/ha, financial internal rate of return 12.57%,average annual profit 3774.00 yuan/ha and annual average profit rate 10.61%. [Conclusion]P. chi-nensis-Eucalyptus mixed plantation is an ideal afforestation mode considering it afforestation effects and economic benefits.
百度学术
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