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shan mu zhong zi yuan kai hua wu hou te dian de yan jiu
Author(s): 
Pages: 10-18
Year: Issue:  1
Journal: Journal of Beijing Forestry University

Keyword:  杉木种子园开花物候;
Abstract: 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。
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