Effect of Two Seaweed Fermentation Solutions on Seed Germination and Seedling Growth of Cabbage
In this study,we investigated the effects of different dilutions of Laminaria japonica and Enteromorpha prolifera fermentation solutions on seed germination and seedling growth of cabbage to provide theoretical basis for the development and application of seaweed resources in crop production.Using cabbage seeds'Sundance 103'as test material,three different mass fraction groups(1%,5% and 20% groups)of two kinds of seaweed fermentation solution were used to carry out cabbage seed germination test and seedling foliar spraying test.The physiological regulation effects of fermentation solution on cabbage crop was analyzed by measuring the germination indexes of the seeds as well as the growth and physiological indexes of the seedlings.The results showed that the germination indexes of cabbage seeds were significantly different between the two seaweed fermentation solutions in different mass fraction groups:5% Enteromorpha prolifera fermentation solution had the highest germination potential,which increased by 9.32% compared to CK.20% Enteromorpha prolifera fermentation solution had the highest seed germination rate of 94.67%,which increased by 10.94% compared to CK.20% Laminaria japonica fermentation solution had the best effect in promoting embryo development.The embryo radicle length and germ length were significantly increased by 22.03% and 28.10%,respectively,compared to CK.The different mass fraction group treatments of the two seaweed fermentation solutions had significant differences in the growth indexes of cabbage seedlings:1% Laminaria japonica fermentation solution had the greatest growth promotion effect on seedlings,with the stem length increased by 17.46% compared to CK,and the fresh weight increased significantly by 34.85% compared to CK.The different mass fraction treatments of two kinds of seaweed fermentation solutions had significant differences in the physiological resistance indexes of cabbage seedlings:as the mass fraction of seaweed fermentation solution increased,the MDA content showed a rising trend,and the 1% treatment group was the lowest,which was smaller than CK.The SOD and CAT content showed a decreasing trend,and the 1% treatment group was the highest,which was significantly higher than CK.In summary,the two seaweed fermentation solutions could not only promote the seed germination and seedling growth,but also reduce the accumulation of MDA,increase the SOD and CAT content,and effectively enhance the level of plant resistance,with the best overall effect from 1% mass fraction Laminaria japonica fermentation solution.
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