1. Liu Hua, Ryder. Estimation of forest carbon storage and carbon density in Huoditang forest region of Qinling Mountains in 2005. China agricultural science electronic journal, 21(3):138 ~142.2. Liu Hua, Rhett. Research methods and progress of carbon storage and carbon balance in China forest ecosystem in 2005. Acta Botanica Sinica, 25 (4):835~843. 3. Liu Hua. Red. Spatial distribution pattern and carbon storage density of Pinus tabulaeformis and Pinus huashanensis in Huoditang forest region of Qinling Mountains in 2007. Journal of China Ecological Agriculture, 15( 1):5-8. 4. Zang Runguo, Jiang, et al. 2007. Temporal and spatial changes of soil respiration rate in Picea schrenkiana forest. Natural resources. 22 (4):568-578.5. Liu Hua, Reid, Hou Lin, etc. 2009. Carbon storage and density of main forest types in Huoditang forest region of Qinling Mountains. Journal of Northwest A&F University,17 (3):133-140 ... et al. 2009. Characteristics of gas exchange in leaves of two wild poplar seedlings in He E Valley, Xinjiang. Forestry, 45(6):45-53. 7. Liu Hua, Zang Runguo, Zhang Xinping, et al. 2009. Study on photosynthetic physiological and ecological characteristics of wild Saussurea involucrata in three natural habitats in the middle Tianshan Mountains. Forestry, 45 (3): 40. Li Peipei. Microclimate regulation of green space types in major cities of Hefei in 2009. Urban Ecology and Environment, 22(6): 39-42. 9. Zang Runguo, Liu Hua, Zhang Xinping, et al. 2009. Photosynthetic characteristics of Picea schrenkiana at different ages in natural forests in central Tianshan Mountains. Forestry, 45 (5): 60-68.650. Zhang Xinping is 20 1 1. Analysis of influencing factors on natural regeneration of poplar seedlings in Irtysh River basin, Xinjiang. Journal of Northwest Forestry University, 26 (1): 98-102.11. Liu Hua, Zhang Yuping, etc. 2011,38 (2):190-196.12. Liu Hua, Zang Runguo, et al. Seasonal variation of soil respiration rate of main forest types in the middle Tianshan Mountains. Journal of Anhui Agricultural University, 20 16548. 38(5): 708-7 12. 13. Zang Runguo, Jing,, et al (same), 201. Ecological characteristics of forest vegetation in northern Xinjiang. Beijing: Modern Education Press.