摘要
[目的]揭示互花米草种群有性繁殖期花器数目及种子产量构成因子的分配对策。[方法]以分布于广西合浦山口红树林保护区的互花米草(Spartina alterniflora)为研究对象,研究并统计不同生境条件(淤泥质、泥沙质、沙质)下互花米草种子成熟期结实器官的形态、数量特征及饱满种子的百粒重。[结果]单株互花米草以泥沙质中的长势最好,沙质中生长的互花米草结实器官各形态因子均大于在淤泥质和泥沙质中,但是结实器官的数量特征则是淤泥质中的互花米草占优势,沙质的其次,泥沙质中的最低;3种生境中小穗顶端的种子饱满程度远高于小穗底部。[结论]生境条件较好时,互花米草营养生长相对旺盛,但小穗的结实率下降;当生境条件较差时,情况相反。
[ Objective ] The countermeasure on the number of fructification of Spartina alterniflora in the period of sexual reproduction and the component of seed yielding construction was explored. [ Method] The Spartina alterniflora in Mangroves conservation zone located at Hepu of Guangxi being taken as experimental material, its morphological and quantitative characteristics, as well as the weight of 100 full seeds at ma- turity stage in three different growth conditions（ clay, loam and sand） were studied. [ Results] The results showed that Spartina alterniflora had the best growth pattern in the loam. The morphological factors of fructification of S. alterniflora grown in sand were larger than in others. In the three growth conditions the order of quantitative characteristics of fructification of S. alterniflora was clay 〉 sand 〉 loam and the seeds in spikelet at top position were more maturity than those at the button position. [ Conclusion ] In good condition, the Spartina alterniflora growth was vigor but the ratio of seed-setting was low.
出处
《安徽农业科学》
CAS
北大核心
2009年第8期3516-3517,3575,共3页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(30660036)
广西自然科学基金项目(桂科自0728096)
广西研究生教育创新计划项目(2008106020907M266)
关键词
互花米草
不同生境
结实器官
数量特征
Spartina aherniflora
Different habitat
Fructification
Quantitative characteristics
