[关键词]
[摘要]
目的研究不同施水处理下金荞麦的形态和生物量分配。方法采用盆栽试验方法,测定了不同施水处理下金荞麦形态指标、生物量积累及二者分配情况。结果金荞麦植株主茎长、主茎节间长、总叶数、新叶数、一级分枝数随施水量减少呈现递减趋势,而主茎直径的变化呈现出中度施水>高度施水>低度施水的趋势;金荞麦总生物量以及各构件生物量随着施水量减少呈现递减趋势。与对照相比,高施水量处理减少了金荞麦植株主茎和叶片的生物置配置,增加了植株其他构件生物量的分配;低施水量减少了金荞麦植株主茎、分枝茎和叶片的生物量配置,增加了根生物量配置。结论不同施水量显著影响金荞麦的生长、生长量积累及其分配;在金荞麦栽培管理过程中,应当适当增加施水量。
[Key word]
[Abstract]
Objective To sutdy the morphology and biomass distribution of Fagopyrum dibotrys under different water-supplying conditions.Methods Potted plant test was used to mensurate the morphological index,the biomass accumulation and distribution of F.dibotrys under different water-supplying conditions were observed.ResultsThe length of the main stem,the internode length of the main stem,the number of total leaves,the number of new leaves and the number of first class branches of F.dibotrys represented a gradually decreasing trend with the decrease of water-supplying amount,and the change of the stem diameter followed such a trend:medium water-supplying high water-supplying low water-supplying.The total biomass and modular biomass of F.dibotrys represented a gradually decreasing trend with the decrease of water-supplying;Compared to the control group,the main stem and the leaf biomass distribution of F.dibotrys decreased under the condition of high water-supplying,while other modular biomass distribution of F.dibotrys increased.In contrast,under the condition of low water-supplying,the main stem,the branch stem,and the leaf biomass distribution of F.dibotrys decreased,while the root biomass distribution of F.dibotrys increased.Conclusion The water-supplying should be increased gradually during the cultivation of F.dibotrys,since different water-supplying conditions significantly affect the growth,the biomass accumulation,and the biomass distribution of F.dibotrys.
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[基金项目]
国家自然科学基金资助项目(30070080)