厚朴生长与立地因子关系的调查研究

运用逐步回归分析与通径相关分析方法，分别对厚朴树高、胸径、皮厚、皮重与立地因子的关系进行了分析研究。结果表明：影响厚朴树高、胸径、皮厚、皮重的主要立地因子有地形部位、有机质、坡向、海拔、速效钾以及铵态氮等。选择海拔８００─１２００ｍ的阳坡山谷或山麓，且富含有机质的土壤栽植，可提高树皮产量

CORRELATION OF GROWTH OFFICINAL MAGNOLIA TO THE SITE FACTORS

The correlation of Magnolia officinalis to the factors in itsgrowing site is Studied using stepwise regression and path-correlativeanaiysis. Results show that the main factors which limit the growth ofthis plant in height,d.b.h.bark thickness, and bark weight are thestand site, the content of organic matter in the soil, the slope azimuth,the altit ude, the content of ammonium nitrogen and rapidly available po-tassium, It is also indicated that in order to promote the bark yield,itis well advisable to select those south-facing mountain valleys and foot-hills as the growing site which are 800-1200m in altitude and are rich inorganiic matter.