Serotinous cones would prove to be almost fatal for the population if forest fires ceased for any length of time . 若森林火灾中断任意长的一个时期，那么对种群来说，迟裂球果几乎是毁灭性的。
2.
The observed clinal variation in the frequency of serotinous cones may be described as a fairly regular decrease in all directions . 所观察到的晚熟球果的频率梯度变异可描述如下：向四周相当有规律地渐次减少。
3.
Recently , fei cheng city optimizes planting structure based on the development of traditional buddha peach and introduces into many premature and serotinous breed series such as juicy peach , zhonghuashoutao and establishment nectarine . the fruited breeds have reached more than 80 , the area of planting has achieved 6667hm2 and the yield is more than 100 thousand tons . the production value is a hundred million yuan and it can plant peach in four seasons 近年来,肥城市在大力发展传统佛桃的基础上,优化品种种植结构,引进了水蜜桃、中华寿桃、设施油桃等早、中、晚、熟品种系列,结果品种达到80多个,栽培面积6667hm2 ,果品产量达到10万t以上,产值1亿元,基本实现了“四季有桃” 。
