摘要
对矮沙冬青（Ammopiptanthus nanus Cheng f.）的形态学特征、开花物候及花空间分布进行了研究,结果表明：在单花、花序、单株、居群水平上的开花物候都表现出很强的开花不同步性,在单花、单花序水平主要表现在单花寿命4-9 d不等,平均（6.74±1.23）d,以7 d出现的频率最高;单花序开花持续时间范围在4-13 d,平均（8.33±2.63）d,以10 d出现的频率最高;单株及居群水平上表现更为明显.矮沙冬青的花具有虫媒传粉的特征,花主要分布在花枝的上部,下部花所占比例很小,有很多花枝花全部为上部花.相关性分析表明上部花和总花数相关性极显著（r=0.990,P〈0.01）,而中部花、下部花和总花数的相关性不显著,甚至呈负相关.单株不同方位开花数量差异不显著（F=0.0579,P〉0.05）.
The Ammopiptanthus nanus Cheng f. is a typical evergreen broadleaf bush in Xinjiang. We studied its flower biological characteristics, flowering phenology and flower spatial distribution. The results showed that.the flowering phenology shows a strong outasync and profoundly manifested both in single flower, single inflorescence, individual and population. At single flower and inflorescence level, the flower longevity range within 4-9 d,average （6.74±1.23） d,7 d of the most high frequency, and the single inflorescence duration range within 4-13 d,average （8.33±2.63） d, 10d of the most high frequency. While at individual and population level, the outasync of flowering is even more obviously. The flower have many characters of entomophilous pollination,and the flowers mainly distributed in upper part of branching sprays, in many branching sprays, almost all flowers distributed in upper part. The middle part flowers accounted for a small proportion,Pearson correlation analysis indicate that there was a significant correlation between the number of upper flowers and total flowers（r=0. 990, P〈0.01）. and no correlation between middle part flowers,lower part flowers and total flowers ,even a negative correlation. There was no marked difference between the south flowers and north flowers of individual（F=0. 057 9, P〉0.05）.
出处
《西北植物学报》
CAS
CSCD
北大核心
2007年第8期1683-1689,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家科技基础条件平台建设项目(2005DKA21006)中的专题项目
关键词
矮沙冬青
开花物候
濒危植物
Ammopiptanthus nanus Cheng f.
flowering phenology
