红松种子园花粉密度的研究

于１９９４年６月在南岔红松种子园内设８个样点采集花粉。对红松花粉飞散密度变化规律、分布特点受立地条件和气象因子的综合影响进行了研究。结果表明：散粉盛期为３ｄ，日散粉密度最大值出现在１１：００￣１４：００；园内授粉有效高度粉密度不足，仅占地面的１８．３％，且分布不均匀，主风方向边缘低于园中心８４．５％。茶粉密度与座果率密切相关。单位花粉量（１ｋｇ／ｈｍ＾２＝２２．５粒／ｃｍ＾２）可预测种子园花粉密度

STUDY ON THE POLLEN DENSITY IN THE SEED ORCHARD OF KOREAN PINE

In June 1994.eight sample plots were set up in Nancha Korean pine seed orchard in order to collect pollens. The changing rule of pollen dispersal density and its distributive characteristic affected by site conditions and meteorological factors were studied. The results show that the pollen dispersal concentrate mainly in three days.The maximum value of pollen daily dispersal density appear from eleven o'clock to fourteen o'clock.The pollen density is not abundant within pollination valid high. which is only 18.3 percent of that on the ground and its distribution is unequal. the pollen dispersal amount is lower than84.5% that in the direction of main wind. Pollen density has close correlation with bearing rate and the unit pollen amount can predict the pollen density of seed orchard.