摘要
１９８９～１９９３年对贵州黎平东风林场杉木种子园３７５个无性系开花物候作了观察。结果表明，可授期比散粉期来得早，且持续时间长，结束时间与散粉期基本同步，或稍后１ｄ；树冠上层、阳面比下层、阴面开花早，但相差不过１ｄ；阳坡散粉期和可授期进程比阴坡早１ｄ和半天；郁闭度大的林分，可授期和散粉期平均迟到半天，分别晚结束２ｄ半和１ｄ；可授期的早晚与≥５℃积温关系密切，而散粉期与≥１０℃积温关系更紧密；无性系间雌雄花期基本相遇，但在开花始期和持续期上差异明显；各无性系开花先后次序在年度间比较稳定。无性系来源各层次变异大小的顺序为：无性系间＞种源亚区间＞种源间＞种源区间。可授期早的无性系种子质量最差，其次是晚花无性系。
Reproductive phenology were observed on 375 clones in Chinese fir seed or-chard of Liping County Dongfeng Forest Farm ,Guizhou Province during 1989～1994.In thispaper,the differences of flowering phenology among clones,at different positions withincrown and under variOus plantation conditions were described,the relationship of reproduc-tive phenology of the same clones in different years were analyzed, and the patterns of flow-ering phenology were built.In addition,impact of flowering periods on sowing qualities ofseeds and the rate of selfing and on gamete contribution were discussed.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1995年第1期10-18,共9页
Journal of Beijing Forestry University
关键词
杉木
种子园
开花物候
Chinese fir,seed orchards,reproductive phenology
