摘要
通过对77年生赤松解析木材料的研究,得出赤松生长的拟合经验方程,即以年生长量为变量、以年降水量为自变量的函数,通过对函数的求导等数学运算,求出赤松生长的年降水量相对贡献率为79.6%,并通过对历史年水量数据的重建,得出气候变化呈干湿周期性变化的特征,气候变化周期在70a左右,并科学预见气候的湿润周期即将来临。
Based on the study of 77-year-old Pinus densiflora wood,a fitting empirical equation of growth of Pinus densiflora was obtained,which is the function of annual precipitation as a variable and annual precipitation as an independent variable.The relative contribution rate of annual precipitation of Pinus densiflorum was calculated to be79.6%.Through the reconstruction of historical annual water volume data,we can draw the conclusion that the climate change is characterized by periodic changes of wet and dry periods.The climate change cycle is about 70 years and it is predicted that the wet cycle of climate is coming soon.
出处
《防护林科技》
2017年第11期9-13,16,共6页
Protection Forest Science and Technology
关键词
赤松
生长节律
经验方程
解析木
年降雨量
气候周期
Pinus densiflora
growth rhythm
empirical equation
analysis wood
annual rainfall
climatic cycle
