Cabbage Seed Technology axillary bud cuttings

The so-called Chinese cabbage seed collection axillary bud cuttings is to have passed a certain stage of vernalization in axillary buds the size of the parent separation, where appropriate, under the conditions of cutting, outgoing adult plant roots, the planting fields, so that flowering seed, seed collection axillary bud cuttings can be expansion of seed multiplication in multiples of options on the introduction of Chinese cabbage lines, speed up the excellent varieties of pure speed, very good results.

First, select mother plants

Cabbage mother plant choice, should the autumn harvest in the fields on the basis of detailed investigation, according to the established breeding targets individual plant selection. Selected mother plants not only have the characteristics of this variety of characteristics, and should be a main root obvious, no maggot leaves the ball real tight robust plant.

Second, cache vernalization

Mother plant in Harbin in mid-October harvest, drying and a half months later, at 10 the end of pit entry vernalization. In the vernalization period, Jiaonei temperature should be adjusted in the 0-2 degrees. Cabbage pit entry after going down 3-4 times a timely manner, picking the net to help rotten leaves yellow. In the end of December before the injury should pay attention to cabbage, hot, and entry to next year in January, the cold cabbage will have to pay attention to make cabbage mother plant successfully passed the stage of vernalization.

Third, warming germination

Is a cutting or a new strain of axillary bud development, through the warming germination can promote the growth of axillary buds to form a large bud cuttings, improve the survival rate. In Harbin in late February to early March, will vernalization Jiaonei removed from the mother plant and placed 20-25 degrees and temperature conditions suitable for germination, germination 10-20 days, when the axillary bud length of about 3 cm when the cuttings is appropriate. According to two years of practice proved that axillary buds large, hair roots quickly, the survival rate is high; axillary bud is small, easy to hair root, the low survival rate. 3 cm of about 90% -95% survival rate of axillary buds. External axillary bud is small, hair roots slow, low survival rate. Therefore, the choice should be about 3 cm large buds and in the axillary bud cuttings inside.

4, cut bud cuttings

1, matrix formula: cutting a variety of substrates, according to nearly two-year trial results to carbonized rice husk plus the best coarse sand. Matrix after high-temperature sterilization 1:1 tie. This formula is characterized by Axillary hair root fast, neat, rooting rate, and well-developed root system, root mass density thick fern, root a few more.

2, cutting methods: in Harbin area, can be cutting in mid-March. (1) cut bud. Cut with sterile shoots knife, cut off the mother plant roots, leaving a little shortening stems, hip digging part, leaves the ball cut off 2 / 3 or so, will help out micro-off, from the inside out will help in shortened stem with axillary bud to help cut off (not to hurt axillary buds), to help cut into wedge-shaped staircase, the general cutting buds per plant can be cut out 30-40 months. (2) hormone treatment. Chennai B with 2000ppm sodium or potassium James Root, promoting the formation of layers split root. (3) cuttings. According to the bud wedge into 5 × 5 Limi Zhu Xingju matrix, the axillary buds buried most of the matrix, the small department bud tip exposed on it. (4) The cover film. Cuttings later cast plastic sheets, warming moisture in order to facilitate rooting.

3, seedling management: (1) cutting management, and axillary buds, after cutting, we should focus on strengthening the management of temperature and humidity. The ground temperature should be maintained at around 20 ℃, the maximum may not exceed 25 ℃, underground temperature is kept between 18-20 ℃ pm; air humidity maintained at 80% -90%, topsoil see the stem should be timely watering. In addition, when the axillary buds, known for green, the lower the temperature must promptly Jiemo anti-baked, and in the hair root, the combination of watering and spraying nutrient solution 1-2 times to promote new root growth. (2), transplant seedlings management. Axillary buds have been made to be robust and have well-developed root root mass can transplant seedlings. Nutritional bowl area to 10 × 10 Li Mi is appropriate. Transplant seedlings after the temperature and humidity management indicators, based upon the previous standards. At the same time, every 3-4 days with 0.2% -0.3% of the fertilizer water, poured a liquid spray and timely scarification   promote seedling root growth, seedling management of 15-20 days.