【摘要】 在半干旱海涂以不同品系菊芋(Helianthus tuberosus L.)为材料进行田间试验,研究了海水灌溉对不同品系菊芋产量构成及离子分布的影响。结果表明:(1)南芋2号根和地上部生物量较其他品系大,南芋5号和南芋3号株高在各浓度海水灌溉下均显著高于其他菊芋品系,而茎粗在各处理下变化不一致,在30%海水灌溉下,南芋1号根和地上部物质积累未受到抑制作用,其他各品系菊芋的根和地上部物质积累受到了一定抑制。(2)各菊芋品系块茎产量差异较显著,在30%海水灌溉下,南芋2号产量显著高于其他品系,各菊芋品系块茎单重在各处理下差异也较显著,南芋1号和2号块茎单重最大,各菊芋品系块茎总糖和菊糖含量差异较显著。(3)随海水浓度的增加,各品系菊芋根、茎和叶的Cl-和Na+含量均增加,但品系间差异较显著,叶片的Na+含量显著低于根和茎的Na+含量。从生物积累量和块茎产量、总糖和菊糖含量及离子分布看,南芋1号和南芋2号较其他品系更适合在半干旱海涂利用适当浓度海水进行灌溉种植。更多还原

【Abstract】 Field experiments were carried out to study effects of seawater irrigation on yield compositions and ion distribution of different varieties of Helianthus tuberosus growing in coastal mudflat along semiarid regions in 2005.Results show:(1) Nanyu No.2 was higher than the others in biomass of the roots and aerial parts,and Nanyu No.5 and Nanyu No.3 were taller than the others in all treatments,but the effect on diameter of the main stems of the plants varied sharply with treatment.In the treatment of irrigation with 30% seawater,Nanyu No.1 was not affected in biomass accumulation in roots and aerial parts,but the others to a varying extent.(2) The plants differed sharply in yield between varieties.Nanyu No.2 was the highest when irrigated with 30% seawater,and so did they in single tuber weight,total sugar and Inulin content.Nanyu No.1 and Nanyu No.2 were the highest in single tuber weight.(3) Concentrations of Cl-and Na+ in roots,stems and leaves of all varieties increased with the seawater concentration,but significant differences did exist between varieties.Na+ content was lower in leaves than in roots and stems.Judging by biomass accumulation,yield of tubers,total sugar and Inulin contents in tuber,and ion distribution,Nanyu No.1 and Nanyu No.2 were more adaptive to planting in coastal mudflat along semiarid regions with seawater irrigation than other varieties.更多还原