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万家沟油松无性系种子园已达盛果期，为了不断改良提高种子产量和品质，１９９５、１９９６连续两年进行花粉浓度及飞散规律的观测。结果表明：园内雄球花通常于５月中旬开始散粉，花期持续５－１２天。花粉浓度的时空变化及传播距离主要受温度、湿度、风速和风向等气象因子的影响，一天内花粉浓度的最大值出现在１２－１８时，０－８ｍ范围内花粉浓度呈双峰曲线变化，并以６ｍ处花粉浓度最大，占总接收量的４８％；主风方向接收量占１５－２４％。
Wanjiagou Pinus tabulaeformis seed orchard has reached the full fruit period, in order to continuously improve and improve the yield and quality of seeds, polo ralph lauren pas cher, 1995, 1996 two consecutive years of pollen concentration and scattering regular observation. The results showed that the male flowers in the garden usually began to loose powder in mid-May and the flowering period lasts for 5-12 days. The spatiotemporal variation and propagation distance of pollen concentration were mainly affected by meteorological factors such as temperature, humidity, wind speed and wind direction. The maximum pollen concentration in one day appeared at 12-18 h, while the pollen concentration in 0-8 m ranged from bimodal curve, And 6m pollen concentration of the largest, accounting for 48% of the total received; the main wind direction receives 15-24%.