Application of Plant Growth Hormone in Peony

- Jul 28, 2018 -

1. Promote seed germination

Gibberellin Peony seeds have epicotyl dormancy, and stratification (5 ° C) can break dormancy. Seed soaking with 100~300mg/L gibberellin for 12~24 hours can replace low temperature treatment and promote seed germination.

 

2. Promote rooting

2.1 Promote rooting of cuttings

Gibberellin and IAA. Choose the thick branches of peony for two years. Before and after the autumn equinox, cut into 10~15cm long cuttings and use 500~1000mg / L gibberellin or 500mg / L IAA rapid cutting before cutting to promote rooting.

Naphthaleneacetic acid (sodium) IBA. It is easier to produce adventitious roots with the branches that are strong and sprouting in the same year. The shoots were cut into 2~3 shoots, and  quickly soaked with 500 mg/L naphthaleneacetic acid (sodium) or 300 mg/L IBA to increase the rooting rate and survival rate.

 

2.2 Layering rooting

IBA. When using peony of the same year to aerial layering, the treatment with IBA can promote rooting. The specific use method is as follows: About ten days, when the branches are semi-lignified, choose strong and tender branches, from 0.5~1cm of the second to third bud at base to strip about 1.5cm, wrap with non-toxic cotton soaked in 50 to 70 mg/L of IBA solution, and then hoisting and seedling raising with film.


3. Adjust the flowering period

Gibberellin. When the peony is flowering in early spring or winter, a cotton wool ball is placed on the bud of full and fat peony. The cotton ball is dripped with 500mg/L gibberellin every day. After about one week, the flower bud begins to sprout. After that, it is cultured at a lower temperature, and it is moved to a warm environment of about 25 ° C for 25 to 45 days before flowering. In addition, in order to promote the flowering of the peony spring festival. In the flower bud germination to the bud stage, use 100~300mg/L gibberellin to smear the flower buds, once every two to three days, for about four to six times.

Ethephon. Spraying plants once with 500mg / L ethephon solution can promote flowering in advance

 

4. Chemical preservation

Daminozide. The butyric acid peony cut flower is treated with 2~4mol/L thiosulfate and sealed in a plastic bag. It can be stored for three days at room temperature, it can bloom normally after 30 days of low temperature refrigeration. But for more than fifteen days, the flower buds should be wrapped with absorbent paper, otherwise it will be easy to accumulate water and mold. The peony cut flower can be immersed in a 2~4mol/L STS for 10 minutes, then inserted into a bottle of 3% sucrose and 200mg/L 8-hydroxy citrate ±50mg/L butyryl hydrazide.

 


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