桂南地区杉木马尾松人工实生林多形地位指数曲线模型

利用桂南地区收集的人工实生林分标准地材料和优势解析木杉木９３株，马尾松１６２株，建立优势高生长Ｒｉｃｈａｒｄｓ模型。用参数预估法编制桂南地区的杉木、马尾松实生林多形地位指数表。杉木、马尾松各指数级曲线拟合平均剩余标准差分别是０．２９４３ｍ和０．２３２３ｍ；经另外６８株和５２株优势解析木检验，预报误差分别为０．４８７ｍ和０．５０６ｍ，适应性好。

Polymorphic Site Index Models for Chinese Fir and Masson's Pine in the South Region of Guangxi

Based on data obtained from 93 Chinese fir and 162 Masson's pine dominant analysis trees which collected from the two tree species stands in the south region of Guangxi, the high growth models which adapting Richards function as a basic model were established. This paper compiled the polymorphic site index tables of the both stands by estimating parameter method. Testing results show that the fitting and predicting precision of the curve models are high, the both tables are practical and feasible. The fitting mean residue standard variations of each index class of the tables are less than 0. 3 m, Chinese Fir and Masson's pine predicting mean errors are 0. 487 m and 0. 506 m respectively with other 68 and 52 sampled plots come from the area.