【摘要】 本文对永寿县沙棘良种选育基地试验区人工沙棘林单株树高、 30 cm处直径进行了系统的研究 ,结果表明 :1.沙棘 30 cm处直径和树高的速生期一般都出现在第 2～ 5年 ,连年生长量高峰期出现在 3～ 4年之间 ,平均生长量的最大值出现在第 4～ 5年之间。 2 .分别对沙棘树高、 30 cm处直径与树龄进行回归分析 ,得出了沙棘树高、30 cm处直径的生长模型和树冠的生长模型 :D0 .3 0 =10 ( 0 .8774- 1.92 0 1/A) 、H =- 0 .2 784 + 0 .6 2 89A- 0 .0 30 9A2、Cw=1.6 43× 10 0 .2 2 9- 0 .5 3 89/A。更多还原

【Abstract】 In this paper, the seabuckthorn plantation in Yongshou County were surveyed and analyzed. The result showed as the follows: The peak period of growth of diameter in 30cm and height appeared from the second year to the fifth year, the summit increment of annual growth appeared during the third year to the fourth year, the summit increment of average growth was in the fourth year to the fifth year. The best growth model for diameter in 30cm and height was reached by means of non-linear regressions,that were: D （0.30）=10^{（0.8774-1.9201/A）},H=-0.2784+0.6289A-0.0309A².The growth model for seabuckthorn crown was reached by using the growth model for height, that was Cw=1.643×10^{0.229-0.5389/A}.更多还原