肉桂醛对辣椒生物量和品质影响及辣椒疫病防控效果初探

Preliminary Study of Cinnamaldehyde on Biomass and Quality in Pepper and Controlling Effect of Phytophthora Blight

以辣椒为材料,研究了不同浓度肉桂醛处理辣椒对生长、叶绿素含量、根系活力及抗氧化酶活性的影响,同时探讨肉桂醛在田间使用时对辣椒品质、产量以及辣椒疫霉菌防治效果的影响。结果表明,低浓度肉桂醛50和100 mg/L处理下,株高、根长和鲜重的变化趋势相似,与对照相比虽有所降低,但与对照差异不显著,随着肉桂醛处理浓度的增加,株高、根长和鲜重显著降低;叶绿素含量和根系活力随着肉桂醛处理浓度的增加呈现出先增加而后降低,在浓度小于150 mg/L的处理下与对照差异不显著;抗氧化酶SOD和CAT活性呈现出逐渐降低的趋势,而POD活性随着肉桂醛处理浓度的增加呈现出先增加后降低的趋势;同时田间试验发现,使用肉桂醛进行灌根对辣椒的生长和产量没有显著促进作用,但可显著增加辣椒中Vc含量,且发现灌根后,肉桂醛对辣椒疫霉菌的防效比甲霜灵高31.1%,显著大于甲霜灵。说明肉桂醛不仅可以对辣椒苗期灌根进行辣椒疫病预防,且可有效防治疫病的蔓延。

The seedlings of pepper were handled by the various concentrations of cinnamaldehyde.The effects of cinnamaldehyde on the growth,chlorophyll content,root activity and the change of antioxidant enzymes in pepper were studied in this paper.At the same time,the effects of cinnamaldehyde irrigation root on the quality and yield of pepper and the controlling Phyrophthora capsicieffect.The results showed that the change trends of the shoot height,root length and fresh weight were similar in the 50 and 100 mg/L cinnamaldehyde concentration,and there was no significant difference with the control.With the rising of the cinnamaldehyde concentration,the shoot height,root length and fresh weight markedly decreased.The chlorophyll content and root activity showed the trend of increase-decrease with the increase of cinnamaldehyde concentration.When the concentration was less than 150 mg/L,the chlorophyll content and root activity were no significant difference compared with the control.However,the antioxidant enzymes activities of SOD and CAT gradually decreased with the increase of cinnamaldehyde concentration.The change of POD activity was the same with the root activity.Meanwhile,it was found that the growth and yield were no significant difference with the control using cinnamaldehyde irrigation root of pepper in the field experiments,but the Vc content significantly increased using cinnamaldehyde irrigation root of pepper,at the same time,the results indicated that cirmamaldehyde could prevent and control Phytophthora blight effectively,and the controlling effect was 31.1％ higher than that of metalaxyl,significantly greater than that of metalaxyl.All the results showed that cinnamaldehyde could not only prevent the Phytophthora blight in the pepper seedlings by irrigating root and also effectively control the spread of Phytophthora blight.