Comparison of the Xylem Anatomical Traits of <i>L. gmelinii</i>and <i>P. sylvestris</i>var. <i>mongolica</i>at Three Longitudinal Sites

To find out the Xylem anatomical variations we analyzed the cell structure, lumen area early wood, lumen area late wood, ring width growth response relationship to climate factors in boreal forests. We present growth response from 3-sites KYH (Kheyihe), MEDG (Moredagha), ALH (Alihe) from central Daxing’an mountains China. Variations observed in Cell size from 2010-2016 years in Pinus sylvestris var. mongolica and Larix gmelinii. We analyzed growth response from 2010-2016. Results interoperates that significant growth of Larixgmelinii was lower at ALH-site than Pinus sylvestris var. mongolica as compared to KYH and MEDG-site. We measure the influence of temperature and precipitation which have been shown by correlations of different growing seasons. The warmest temperature from June to September at ALH-site growth of late wood show significant differences at ALH-site. It is also observed that summer temperature in late wood have a significant role in cell dimensions, while the influence of spring temperature frequently influences on tracheid size in early wood formation providing well-documented sound for anatomy and generally used for determining the relationship between maximum growth of tree ring density and effect of temperature variation.