Twig cutting propagation method for improved cold resistant variety of Hibiscus hamabo Sieb.et Zucc.

Abstract

Belonging to the technical field of artificial propagation, the invention relates to a twig cutting propagation method for an improved cold resistant variety of Hibiscus hamabo Sieb.et Zucc., and specifically relates to a twig cutting propagation method for an improved cold resistant variety of salt tolerant Hibiscus hamabo Sieb.et Zucc. The method mainly comprises: constructing a full-illumination automatic intermittent spraying cutting pool; taking a mixture of peat soil and perlite in a volume ratio of 1:1 as a cutting medium of 10-12cm in thickness, and leaving the medium adsorb enough water before cutting; trimming a cuttingwood to a length of 8-10cm and reserving 2-3 leaves, and before cutting, carrying out a quick dipping treatment for 3-5 seconds to a cutting base with a mixture of 1000ppm of NAA (naphthyl acetic acid) and 250ppm of 2,4-D (dichlorphenoxyaceticacid); conducting cutting to a depth of 3-4cm; watering thoroughly with a sprinkling can after cutting so as to make the cuttingwood and medium in close contact; conserving the cuttingwood under the conditions of full illumination and automatic water spraying based on weather conditions; transplanting a cutting seedling, the root of which can has a few cutting mediums, thus raising the transplanting survival rate. The cutting propagation method of the invention can maintain the excellent salt tolerant and cold resistant characteristics of the improved cold resistant variety of Hibiscus hamabo Sieb.et Zucc., and is easy and feasible, with a high propagation survival rate. Therefore, the method provided in the invention provides a seedling guarantee for large area promotion and application of the improved cold resistant variety of Hibiscus hamabo Sieb.et Zucc. in the east coastal areas of China.

Description

technical field [0001] The invention belongs to the technical field of plant vegetative propagation, and in particular relates to a method for cutting and propagating twigs of an extremely salt-tolerant tree species seaside hibiscus cold-resistant fine variety. Background technique [0002] Seaside hibiscus (Hibiscus hamabo Sieb.et Zucc.) is a small deciduous tree of the genus Hibiscus in the family Malvaceae, with a height of 3-5m and a diameter at breast height of 20cm. The crown is dense and oblate, with flourishing branches and leaves. Flowers bisexual, solitary in leaf axils near branch ends, pedicels 0.5-1.0cm long, bracteoles 8-10, connected into a cup shape below the middle, calyx 2.0cm long, 1 / 3 connate at the base, corolla diameter 6.0cm, bell Shape, petals 5, obovate, outward roll, golden yellow, inner base dark purple. Native to coastal areas such as Zhoushan and Ningbo in Zhejiang Province, it is a species of woody flowers and saline-alkali land afforestation t...

AI Technical Summary

Problems solved by technology

In the late 1990s, senior engineer Yu Ciying of Zhoushan Forestry Research Institute of Zhejiang Province conducted special research on the biological, ecological characteristics, seedling cultivation and afforestation techniques of this tree species, which promoted the use of this tree species in forestry and landscaping. However, due to the poor frost resistance of this tree species, its scope of application is only in Shanghai and the south

However, due to the severe freezing damage of the aboveground part of the original introduced mother plant in winter, it has not been promoted in Jiangsu Province.