摘要
Abstract
Objective] To enhance the purification efficiency of Vallisneria spiralis in eutrophication water body, and to avoid the fast growth of submerged macrophyte.[Method] After using 0(CK), 50, 100, 150, 200, 250 and 300 mg/L IAA solutions to treat V.spiralis seeds for 24 h, the seed germination rate and seedling growth situation were researched.We also studied the effects of different concentrations (0, 0.01, 0.02, 0.10, 0.20, 0.50, 0.75, 1.00 and 1.25 g/L) of cycocel on the dwarfing characteristics of V.spiralis.[Result] The maximum germination rate of V.spiralis was 58%.Seed germination and seedling height was apparently accelerated after treated with 150 mg/L IAA for 24 h.However, 300 mg/L IAA showed certain inhibitory effects on seed germination and seedling height of V.spiralis.After treated with dif-ferent concentrations of cycocel, the plant height of V.spiralis showed significant differences(P<0.05).Among them, 0.02, 0.10, 0.20, 0.50, 0.75, 1.00 and 1.25 g/L cycocel treatments showed relatively good dwarfing effects.When cycocel concentration was between 0.01 and 1.25 g/L, leaf width and wet weight enhanced significantly (4.8%-118.0%).Root-shoot ratio enhanced in 0.01-0.50 g/L cycocel, but reduced in 0.70-1.25 g/L cycocel.Thus, 0.01-0.50 g/L cycocel was more suitable for V.spiralis dwarfing.[Conclusion] This research provides technical references for the application of V.spiralis in improving water environment with eutrophication water body.关键词
富营养化/苦草/吲哚乙酸/矮壮素/矮化/种子萌发Key words
Eutrophication/Vallisneria spiralis/IAA/Cycocel/Dwarfing/Seed germination分类
农业科技
