尾巨桉(DH32-28)二代高产林生长规律及经济效益研究  

Study on Growth Rule and Economic Benefit of the Second Generation of Eucalyptus gradis(DH32-28) High Yield Plantation

作　　者：唐日俊 韦晟珠 吴敏[1] 钟连香 秦武明[2] 

机构地区：[1]广西南宁树木园,广西南宁530031 [2]广西大学林学院,广西南宁530005

出　　处：《山西农业科学》2017年第1期30-33,59,共5页Journal of Shanxi Agricultural Sciences

摘　　要：采用树干解析法对广西南宁地区尾巨桉(DH32-28)二代高产林生长规律进行分析,结果表明,5年生林分平均树高、平均胸径和平均材积分别达21.33 m,13.62 cm,0.142 4 m^3/株。树高和胸径连年生长量都在第1年时最大且连年生长量曲线均为反"J"型,材积连年生长曲线则呈抛物线状并在第4年出现峰值。经模型研究得出,林分材积数量成熟年限为6 a。二代高产林分的经济效益可观,5年生人工林项目的累积财务净现值为41 960.14元/hm^2,内部收益率为85.76%,高产林年均利润为14 186.00元/hm^2。投资项目年均投资利润率、年均利税率分别达到93.43%和110.09%。The growth rhythm of the second generation of Eucalyptus gradis（DH32-28）high yield plantation in Guangxi anea of Nanning was analyzed by the method of stem analysis. The results showed that the height, DBH and volume of the second generation of Eucalyptus gradis（DH32-28）high yield plantation were 21.33 m, 13.62 cm, 0.142 4 m^3/plant, respectively. The current annual increment curve of tree height and DBH reached the peak in the 1st year, and annual growth curve were anti J type. The current annual increment of volume was parabola and reached the peak in the 4th year. It was 6 years when the volume increment achieved the number of mature according to the growth model of volume. The second generation of Eucalyptus gradis（DH32-28） high yield plantation had a good economic benefit. Financial net present value of investment project was 41 960.14 yuan/hm^2, the annual profit was 14 186.00 yuan/hm^2. The financial internal rate of return,the annual investment profit rate and the average annual profit tax rate were85.76%,93.43%, 110.09%, respectively.

关 键 词：尾巨桉DH32-28 树干解析 数量成熟 效益分析 

分 类 号：S792.39[农业科学—林木遗传育种]