旱快柳树干解析

Stem Analysis of Salix matsudana

为研究旱快柳的生长规律,为其保护、培育和指导规模化生产提供理论依据,以铁岭市昌图县24年生旱快柳为研究对象,通过树干解析,求出树高、胸径、材积与年龄之间的关系曲线.结果表明旱快柳胸径连年生长量高峰值出现在6a,平均生长量高峰值出现在10a左右,可依据连年生长量和平均生长量下降的时间和幅度,并根据培育目的适时间伐;树高连年生长量高峰值出现在4a,平均生长量高峰值出现在4-6a;材积连年生长量在16a前呈现快速增长,16-20a趋于平缓,材积平均生长量在20a后有所减缓.从连年生长量和平均生长量的生长趋势来看,旱快柳的数量成熟龄在20a左右.

In order to study the growth rule of Salix matsudana,a theoretical basis for protecting,nursing and guiding large-scale production of Salix matsudana was provided.Taking 24-year-old Salix matsudana in Changtu County of Tieling City as the research object,the relationship curve among the tree height,DBH,the volume and the tree age were calculated through the stem analysis.Result shows that:the peak value for current annual incre-ment (CAI)of DBH and average increment(AI)of Salix matsudana is at six and ten years respectively.Based on the declined time and extent of CAI & AI,thinning was conducted according to the cultivated aim.The peak value for height CAI and AI is at four and from four to six years respectively.The volume CAI and AI increase faster be-fore 16 years and increase slower from 16 years to 20 years.The average volume growth slows after 20 years.The number of mature age should be around 20 years from growth variation trends of CAI and CI.