用优良度估测种子发芽率的研究

用冲天柏等7种云南主要造林树种154批种子的优良度与发芽率作对比试验，发现优良度与发芽率之间存在着极明显的相关关系，据此建立的直线回归方程，可在1d内估测出种子的发芽率，冲天柏类：y=-0．36 1．00x；云南松类：y=-5．8 0．88x；华山松类：y=-27．6 1．16x，用方程估测的种子发芽率与实际发芽率之间的误差不超过GB2772—1999规定的容许误差。

A Study on Estimation of Seed Germination Rate by Excellent and Good Extent

Through contrast experiments about the excellent and good extent and germination rate of 154 lots of 7 main forestry tree species of Yunnan Province, Cupressus duclouxiana ,etc.,an apparent correlation between excellent and good extent and germination rate have been concluded,thereforea a straightline regressive equation has been established,and the seed germination rate can be estimated in one day according to these equations.Showed below are the specific equations: Cupressus duclouxiana type: y =-0.36+1.00 X ; Pinus yunnanensis type: y =-5.80+0.88 X ; Pinus armandii : y =-27.6+1.16 X .The difference between the estimated seed germination rate and the practical germination rate is less than permitted difference in GB 2772-1999.