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1988～1989年在卢氏油松无性系种子园和人工油松林内外设立花粉采样点,观测花粉在不同山地类型的传播特点及对下风方向种子园侵染的危险性。结果表明:油松花粉传播受地形、散粉日期、风速、大气湿度等因素的影响。风速大、空气干燥,天气晴朗的日子,散粉速度快,传粉距离远,在开阔地、抬升地、对坡地形中,距离花粉源数百米甚至数千米地点的花粉浓度常高于花粉源的花粉浓度,对坡地形尤为显著。因而,在营建山地种子园时,至少应保持1000 m的隔离距离。本文还结合实验结果,对山地种子园的建立和管理提出了一些看法。
From 1988 to 1989, pollen sampling sites were set up inside and outside the Pinus tabulaeformis and Pinus tabulaeformis plants to observe the transmission characteristics of pollen in different mountainous areas and the risk to the seed orchard in the leeward direction. The results showed that the pollen transmission of Pinus tabulaeformis was influenced by such factors as topography, date of loose powder, wind speed, atmospheric humidity and so on. Wind speed, air dry, sunny days, loose powder speed, pollination distance, in the open, uplifting, slope topography, the distance from the pollen source of hundreds of meters or even thousands of meters pollen concentration is higher than the pollen source Pollen concentration is particularly significant for slope topography. Therefore, a minimum separation distance of 1000 m should be maintained during the construction of mountain seed orchards. Based on the experimental results, this paper also put forward some views on the establishment and management of mountain seed orchard.