森林固碳可减缓气候变暖环境恶化,故碳汇一直是国内外研究热点。我国人工林已成为林业主体,西北地区将成为未来人工造林的主要区域,但西北碳汇和生物量的研究较少,为探明西北地区人工林碳汇功能,且不破坏原有基础设施,特开展本项研究。以绿洲田渠林路式新疆杨农田防护林带为调查对象,采用空间代时间的方法,按照胸径、树高由小到大,由胸径、树高与相对应的根生物量建立生长模型,以此模拟林带生物量增长过程。对根生物量调查,采取6个步骤和相应计算公式,设计了一种田渠路林式农田防护林带根生物量调查计算方法,最终建立了由胸径、树高与根生物量的增长模型,其中胸径与主根、侧根、根生物量模型分别为$W=0.0268D_{1.3}^{2.1717},W=0.0191D_{1.3}^{2.1346},W=0.0465D_{1.3}^{2.1557}$。模型经检验,回归关系极显著,与以往模型相比更可靠实用。

Forest carbon sequestration can slow down the deterioration of climate warming,so carbon sink has been a hot research at home and abroad.Plantations of China has become the main body of forestry,the northwest region has become the future forestry development direction,but the northwest carbon sink and biomass research less.In order to explore the northwest area of plantation carbon sink function,and not to destroy the original infrastructure,this research is conducted.In this paper,the growth model of Populus alba var.pyramidalis Bunge.shelterbelt was simulated by the method of space instead time,and the growth model was established according to DBH and tree height from small to large and underground biomass.Based on the investigation of underground biomass,a calculation method,6 steps and corresponding calculation formula of groundwater biomass survey were established,and the growth model of DBH,tree height and underground biomass was established.The DBH and root,lateral root and root biomass models are: $W=0.0268D_{1.3}^{2.1717},W=0.0191D_{1.3}^{2.1346},W=0.0465D_{1.3}^{2.1557}$,the regression relationship is very significant.Compared with the previous model,the models are more reliable and practical.