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以百农矮抗58小麦为材料,采用大田试验的方法,研究了始穗期喷施不同浓度(0,10、30、50 mg·L-1)的5-氨基乙酰丙酸(ALA)对冬小麦花后干物质生产和旗叶衰老的影响.结果表明:10～50 mg·L-1 ALA处理有利于植株对干物质的积累,至成熟期其干物质总量明显高于对照(0 mg·L-1);10～50 mg·L-1 ALA处理各器官干物质的分配率与对照没有显著性差异,但其花后生产的干物质对产量的贡献率显著高于对照;在开花期,10～50 mg·L-1ALA处理的叶面积指数与对照没有显著性差异,但在乳熟期和腊熟期,叶面积指数显著高于对照.从开花期至蜡熟期,10～50 mg·L-1 ALA处理的旗叶SPAD值和净光合速率均高于对照;在灌浆后期,ALA处理降低了旗叶丙二醛(MDA)含量和相对电导率.与对照相比,10～50mg·L-1 ALA处理冬小麦的穗粒数、千粒重和产量显著增加,其中以30 mg·L-1 ALA处理增产效果最大.
In this study, field experiments were carried out to study the effects of spraying 5-aminolevulinic acid (ALA) with different concentrations (0, 10, 30 and 50 mg · L -1) The results showed that 10 ~ 50 mg · L-1 ALA treatment was beneficial to the accumulation of dry matter of the plant, and the total dry matter of the plant at maturity was significantly higher than that of the control (0 mg · L-1). The distribution rate of dry matter in organs treated with 10 ~ 50 mg · L-1 ALA had no significant difference with that of the control, but the contribution of dry matter produced after flowering to yield was significantly higher than that of the control The leaf area index of 10 ~ 50 mg · L-1ALA treatment had no significant difference with the control, but the leaf area index was significantly higher in milk ripening stage and wax maturity stage than that of the control.From the flowering to wax maturity, The SPAD value and net photosynthetic rate of flag leaf at 50 mg · L-1 ALA treatment were higher than those at the control, and at the late filling stage, ALA treatment reduced the MDA content and relative conductivity of flag leaf.Compared with the control The grains per spike, 1000-grain weight and yield of ~ 50 mg · L-1 ALA treatment significantly increased, and the treatment with 30 mg · L-1 ALA had the highest yield.