信阳地区是我国杉木分布的北部边缘地区,杉木在此生长要求的立地条件较高,如何选择适宜杉木生长的造林地,了解杉木立地质量的优劣,对发展我省杉木生产,有着重要的意义。立地指数表的编制,对了解立地质量的等级,选择适宜的杉木造林地,克服盲目性增强予见性,对营造杉木林将起着重要的作用。 Xinyang is the northern edge of the distribution of China fir, fir growth in the site conditions required for the establishment of high, how to choose suitable for the growth of fir plantation to understand the pros and cons of the quality of Chinese fir site, the development of our province fir production is of great significance . The establishment of the site index table will play an important role in understanding the grade of site quality, selecting suitable sites for afforestation of the fir, and improving the visibility by overcoming the blindness.