7年生马尾松组培苗试验林经营效益

Management Benefit of 7-year-old Pinus massoniana Tissue Culture Seedling Test Forest

通过收集7年生马尾松组培苗试验林胸径、树高、材积和产脂量数据,利用项目投资的财务效益评估手段对其经济效益进行分析研究,为丰富马尾松人工林高效培育技术体系提供试验依据。结果表明:在当前立地条件和经营措施下,组培苗林分林木胸径、树高、平均材积、蓄积量、出材量为15.5 cm、10.03 m、0.1008 m^(3)、151.20 m^(3)·hm^(-2)、91.5879 m^(3)·hm^(-2),分别比实生苗提高了27.0%、21.9%、89.5%、89.5%、94.9%,中径材林木数量占总株数比例提升了30个百分点,组培苗林分生长优势突出,材种规格获得大幅度提升。采脂后组培苗林分产值、净收益、净现值、内部收益率(IRR)为142869.1元·hm^(-2)、54283.4元·hm^(-2)、19802.4元·hm^(-2)、17.2%,分别比未采脂提高了130.9%、855.1%、331.5%、14.7个百分点,比实生苗林分提高了368.6%、475.8%、203.9%、26.6个百分点。7年生马尾松组培苗林分经济效益显著,在立地条件相似地区应用马尾松组培苗造林,可大幅度提高人工林经营效益。

By collecting the data on the DBH,tree height,volume and resin yield of 7-year-old Pinus massoniana tissue culture seedlings in a test forest,the economic benefits were analyzed and studied using the financial benefit evaluation method of project investment.The aims of this study is to provide an experimental basis for enriching the efficient cultivation technology system of Pinus massoniana plantations.The results showed that under the current site conditions and management measures,the tissue-cultured seedling forest had a DBH of 15.5 cm,a tree height of 10.03 m,an average timber volume of 0.1008 m^(3),a standing volume of 151.20 m^(3)·hm^(-2),and a merchantable volume of 91.5879 m^(3)·hm^(-2).These values increased by 27.0%,21.9%,89.5%,89.5%,and 94.9%compared to seedling forests,respectively.The proportion of medium-diameter timber trees in the tissue-cultured seedling forest increased by 30 percentage points.The tissue-cultured seedling forest exhibited significant growth advantages and achieved a substantial improvement in timber specifications.After resin tapping,the production value,net income,net present value,and internal rate of return of the tissue-cultured seedling forest were 142869.1 yuan·hm^(-2),54283.4 yuan·hm^(-2),19802.4 yuan·hm^(-2),and 17.2%,respectively.These values increased by 130.9%,855.1%,331.5%,and 14.7 percentage points compared to untapped forests,and by 368.6%,475.8%,203.9%,and 26.6 percentage points compared to seedling forests.The economic benefits of the 7-year-old tissue-cultured seedling forest of P.massoniana were significant,and the application of tissue-cultured seedlings in similar areas with site conditions can greatly improve the operational efficiency of artificial forests.