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| Effects of GA3 and 6-BA Combination Treatment on Germination and Seedling Raising of Sweet Potato |
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| DOI：10.16768/j.issn.1004-874X.2023.06.002 |
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| Abstract: |
| 【Objective】In order to effectively alleviate the problem of sweet potato thin and weak seedlings caused
by GA3
soaking and germination in production, the feasibility of GA3
and 6-BA combination soaking treatments to improve
the quality of sweet potato seedlings was studied.【Method】The seeds were soaked with 1, 5 and 10 mg/L GA3
alone and
mixed with 5 mg/L 6-BA respectively, which were named as group G and group GB. In addition, there are two treatments of
water immersion (G0, CK1
) and 5 mg/L 6-BA separate immersion (G0B, CK2
), a total of 8 treatments were conducted to study
its effects on the germination of sweet potato tubers, the growth morphology of sweet potato seedlings, weight of the single
seedling, dry matter percentage and the number of harvested seedlings in ‘Xinxiang’.【Result】The results showed that 1
mg/L GA3
soaking treatment had the best effect on regulating the germination of sweet potato and the growth morphology
of sweet potato seedlings. The average number of root eye germination of sweet potato was 11, the total number of buds was
16.33, the average seedling height was 8.80 cm, and the diameter of the seedling base was 3.01 mm. However, with the increase of GA3
concentration, the diameter of the seedling base ,the weight of the single seedling and the dry matter percentage
became smaller, and the quality of the sweet potato seedlings became worse. After GA3
and 6-BA compound treatment, the
quality of potato seedlings was effectively improved. The higher the concentration of GA3
, the more significant the effect was.
Among them, 10 mg/L GA3
and 5 mg/L 6-BA compound soaking treatment had the best effect on improving the quality of potato
seedlings. The diameter of the seedling base was 3.40 cm, the dry matter percentage was the highest, and the weight of the single
seedling was higher than that of GA3
soaking treatment alone. The two treatment groups can effectively improve the number of
harvested potato seedlings, and the difference is very small. Among them, the total number of seedlings harvested in the GA3
treatment group(G1+G5+G10) was 282, but the quality of potato seedlings was poor. The total number of seedlings harvested in
the combined treatment group of GA3 and 6-BA(G1B+G5B+G10) was 281, and the quality of potato seedlings was significantly
improved.【Conclusion】In conclusion, 6 -BA can alleviate the disadvantages caused by high concentration GA3
soaking seed,
make the stems of sweet potato seedlings thick, the dry matter percentage increases, and the quality of the seedlings improves.
Furthermore, the combination of 10 mg/L GA3
and 5 mg/L 6-BA could effectively alleviate the seedling we akness caused by
high concentration of GA3
on sweet potato variety ‘Xinxiang’. |
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