摘要
植物体是一个构件集合体 ,植物的枝系伸展可由芽库出生率、死亡率的统计学过程来分析。在东灵山地区 ,应用随机枝取样法调查了辽东栎芽的命运 ,并对其与枝长、叶数、果数等的关系进行了统计分析。结果表明 :( 1 )辽东栎的芽或保持休眠状态 ,或死亡后脱落 ,或分化为营养枝、生殖枝 (包括雄花枝、雄花序、雌花枝和两花枝 )等 ;( 2 )不同生境中芽的命运不同 ,生活在林窗中的幼树上的芽分化为具有生殖功能的枝条的比例显著高于郁闭林中的幼树 ,而与成熟个体接近 ;( 3)芽的命运还受其它因子的影响 ,如上层枝条上、或叶数多的长枝上的芽分化为生殖枝的可能性大于其它的芽。另外还发现结实枝的枝长、枝上叶数都明显高于非结实枝。
In Dongling Mountain region,the fates of the buds of Quercus liaotungensis were investigated using randomized branch sampling method,and their relationship to shoot length,the number of leaves and the number of fruits were statistically analyzed.The results are as follows:(1) the buds of Q.liaotungensis might remain dormant,or abscise after death,or differentiate to be vegetative shoots and generative shoots;(2)the fates of buds varied with habitats,i.e.,the proportion of the buds producing generative shoots of the saplings growing in canopy gap was significantly higher than that of the saplings growing in closed canopy,and approximated to that of the mature trees in the closed canopy;(3)the fates of buds were affected by other factors,e.g., the buds on upper shoots and on long shoots with more leaves had larger probability to produce generative shoots than the counterparts.It was also found that the shoots bearing no fruits were shorter than the shoots bearing fruits,on which the number of leaves was bigger.
出处
《生态学报》
CAS
CSCD
北大核心
2001年第3期385-390,共6页
Acta Ecologica Sinica
基金
中国科学院重点资助项目! ( KZ951 -SI-ZI)
国家自然科学基金!资助项目 ( 30 0 0 0 0 2 3)
关键词
辽东栎
芽
生境
枝长
叶数
Quercus liaotungensis
the fate of bud
habitat
shoot length
number of leaf
