生殖生长对川泽泻源库关系的影响

目的 研究生殖生长对川泽泻源库关系及其特征指标的影响，为其高产优质栽培和育种提供参考。方法 比较留薹和去薹植株各部位干物质量、叶和块茎非结构性碳水化合物及含氮化合物量等生理指标的积累过程。结果 生殖生长的保留有利于川泽泻生殖库的积累，不利于叶源和营养库的增长，能够显著增加植株总库容，提高植株总生物量；去除生殖生长能够增加叶生长后期和块茎产量形成期的C/N值，提高叶和块茎的产量。结论 川泽泻栽培过程中应采取人工措施及时调整植株C/N值，以提高块茎产量；品种选育过程中，应选择叶片数适量且生长后期叶片C/N值高、块茎含氮量高的品系。

Effect of reproductive growth on source-sink relationship of Alisma plantago-aquatica

Objective The effects of the reproductive growth on the source-sink relationship and source-sink characteristic indexes of Alisma plantago-aquatica were studied in order to provide a potential reference for the cultural techniques of high yield and quality and breeding. Methods The dry weight in each part and the content of non-structure carbohydrates and nitrogen compounds in the leaves and tubers from the wiping off bolting and bolting plant were tested; The accumulative process of physiological indexes was compared. Results Reproductive growth could benefit the accumulation of reproductive sink, go against the increase of source of leaves and vegetative sink, and obviously increase the plant total storage capacity and the total biomass. Wiping off the reproductive growth could increase the C/N ratio in the leaves at the later stages of plant growth and the tubers during the yield formative period, and promote the production of the leaves and tubers. Conclusion During the process of cultivation, it is supposed to promptly adjust the plant C/N ratio by artificial measures for increasing the tuber production. The strains with suitable amounts and high C/N ratio in the leaves and high nitrogen content in the tubers at the later stages of the plant growth should be chosen for breeding.