毛乌素沙地气候因子对樟子松、油松生长的影响

Effect of climatic factors on growth of Pinus sylvestris var.mongolica and Pinus tabulaeformis in the Maowusu Sandland

调查了毛乌素沙地沙漠研究中心樟子松、油松人工林的生长状况,选取可能影响其生长的气候因子并运用双重筛选逐步回归的方法,对樟子松和油松高生长与气候因子间的关系进行了逐步判别分析。结果表明:影响樟子松树高生长量的主导气候因子依次是前一年的降雨量、≥10℃积温、年蒸发量;影响油松生长的气候因子主要是前一年降雨量与当年降雨量;该区樟子松的生长表现明显好于油松,并且在干旱年份表现出更强的抗旱特性,所以该地区的气候条件更适合樟子松的生长。

This paper is based on the investigation and analysis of the growth of Pinus sylvestris var. mongolica and Pinus tabulaeformis in the Maowusu Sandland. Stepwise distinguishing analysis was conducted on selected climatic factors that might influence the growth of the two tree species. The results showed that the dominant climatic factors which influenced the growth of Pinus sylvestris var. mongolica were annual rainfall of the previous year, ≥10℃ accumulated temperature, and annual evaporation;the dominant climatic factors which influenced the growth of Pinus tabulaeformis were annual rainfall of the previous and current years. Piruts sylvestris var. mongolica in this area grew better than Pinus tabulaeformis, which shows stronger drought resistance. So climatic factors of this area are more suitable to the growth of Piruts sylvestris vat. mongolica.