1.Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China 2.Southern Research Station, USDA Forestry Service, Pineville LA 71360, USA
Abstract:Rapid prediction of annual ring density of Paulownia elongate standing trees using near infrared spectroscopy was studied. It was non-destructive to collect the samples for trees, that is, the wood cores 5 mm in diameter were unthreaded at the breast height of standing trees instead of fallen trees. Then the spectra data were collected by autoscan method of NIR. The annual ring density was determined by mercury immersion. And the models were made and analyzed by the partial least square (PLS) and full cross validation in the 350-2 500 nm wavelength range. The results showed that high coefficients were obtained between the annual ring and the NIR fitted data. The correlation coefficient of prediction model was 0.88 and 0.91 in the middle diameter and bigger diameter, respectively. Moreover, high coefficients of correlation were also obtained between annual ring density laboratory-determined and the NIR fitted data in the middle diameter of Paulownia elongate standing trees, the correlation coefficient of calibration model and prediction model were 0.90 and 0.83, and the standard errors of calibration(SEC) and standard errors of prediction(SEP) were 0.012 and 0.016, respectively. The method can simply, rapidly and non-destructively estimate the annual ring density of the Paulownia elongate standing trees close to the cutting age.
Key words:Near infrared spectral analysis;Paulownia elongate;Standing trees;Annual ring density
[1] Bokobza L.Journal of Near Infrared Spectroscopy,1998,6(1):3. [2] QU Hai-bin, LIU Quan, CHENG Yi-yu(瞿海斌, 刘 全, 程翼宇). Chin. J. Anal. Chem.(分析化学), 2004, 32(4): 477. [3] LU Wan-zhen, YUAN Hong-fu, XU Guang-tong, et al(陆婉珍,袁洪福,徐广通,等). Modern Near Infrared Spectroscopy Analysis Technology(现代近红外分析技术). Beijing: China Petrochemical Press(北京: 中国石化出版社), 2001. 10. [4] Batten G D. Journal of Near Infrared Spectroscopy, 1998, 6(1):105. [5] Ciurczak E W. Food Testing and Analysis, 1995, (5):35. [6] HE Xu-sheng(何绪生). Chinese Journal of Soil Science(土壤通报), 2004, 35(4):487. [7] Conway J M, Norris K H, Bodwell C E. American Journal of Clinical Nutrition, 1984, 40(6):1123. [8] YANG Nan-lin, CHEN Yi-yu, QU Hai-bin(杨南林, 程翼宇, 瞿海斌). Acta Chimica Sinica(化学学报), 2003, 61(5): 742. [9] Kelley S S, Rials T G, Groom L R. Wood Sci. Technol., 2004, 38: 257. [10] Hauksson J B, Bergqvist G. Wood Sci. Technol., 2001, 35: 475. [11] Michell A J. Appita Journal, 1995, 48(6): 425. [12] Wright J A, Birkett M D, Gambino M J T. TAPPI Journal, 1990, 73(8): 164. [13] Lwamoto M, Kawano S, Ozaki Y. Journal of Near Infrared Spectroscopy, 1995, 3(4): 179. [14] Rials T G, Kelley S S, So C L. Wood and Fiber Science,2002, 34(3):398. [15] Schimleck L R, Evans R. IAWA Journal, 2002, 23(3):225. [16] Tsuchikawa S. Journal of Near Infrared Spectroscopy,1998, 6(1):41. [17] Sefara N L, Conradie D, Turner P. TAPPSA Journal, 2000, 11:15. [18] Thumm A, Meder R. Journal of Near Infrared Spectroscopy,2001, 9(3):117. [19] JIANG Ze-hui, HUANG An-min, WANG-Bin(江泽慧, 黄安民, 王 斌). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2006, 26(6): 1034. [20] JIANG Ze-hui, HUANG An-min, FEI Ben-hua,et al(江泽慧, 黄安民, 费本华, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2006, 26(7): 1230. [21] JIANG Ze-hui, HUANG An-min(江泽慧, 黄安民). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2006, 26(8): 1464. [22] YANG Zhong, JIANG Ze-hui, FEI Ben-hua,et al(杨 忠, 江泽慧, 费本华, 等). Scientia Silvae Sinicae(林业科学), 2005, 41(4):177. [23] LI Jian(李 坚). Wood Science(木材学). Haierbin: Northeast Forestry University Publishing House(哈尔滨: 东北林业大学出版社), 1994. 32. [24] CHENG Jun-qing(成俊卿). Wood Science(木材学). Beijing: China Forestry Publishing House(北京:中国林业出版社), 1985. 463. [25] Olson, J R, Carpenter, S B. Wood and Fiber Science, 1985, 17(4): 428.