樟子松种子园花粉的时空变化研究

樟子松种子园雄花散粉历时７ｄ左右。散粉高峰期为前３ｄ，每天散粉时间为５时至１９时。每天散粉的时变化主要受温度，湿度影响，上午散粉量随着温度的增加，相对湿度的降低而增加，下午散粉量随着温度的降低，相对湿度的增加而降低。在空间垂直方向自上而下的花粉布呈现由少到多的变化趋势。在水平方向上，趋势面分析表明，位于山坡中部的种子园花粉量最多，山坡下部及上部的花粉量较少，不同方位所接收的花粉量不同，西向，偏西向

A STUDY ON POLLEN DISPERSAL OF PINUS SYLVESTRIS VAR.MONGOLICA IN TIME AND SPACE IN SEED ORCHARD

The pollen dispersal periods in pinus svlvestris var.mongolica seed orchard are about seven days.and concentrate mainly in the first three days.The daily pollen dispersal period is from five o'clock to nineteen o'clock.The time change of daily dispersal is affected mainly by temperature and humidity.In the morning.With the temperature going up and the relative humidity falling.the pollen dispersal amount increases,and in the afternoon.with the temperature falling and the relative humidity going up.the pollen dispersal amount decreases.In vertical direction of space,the pollen density is from thin to dense with the height decrement.In horizontal direction.the results of trend surface analysis show that the pollen density is dense in the middle of hillside and thin both in upper and lower parts of hillside.different direction accept different amount of pollens.And west position accept more pollens.