Three Propagation techniques for seed Propagation of cauliflower

Cauliflower planting

(1) the method of separate plant breeding:

Select strong-growing cauliflower for many years, dig out some or all of the mother plant clump rhizome, shake off the soil, cut off the old and diseased roots in the lower part of the rhizome, separate one plant by one, remove the yellow-brown hairs around the rhizome, and expose the main and lateral buds. Each rhizome retains 2-3 layers of new roots and is planted in the field. Features: simple operation, high survival rate, the four seasons can be carried out, but spring and autumn is better, is one of the commonly used methods of asexual reproduction.

Second, the method of bud propagation:

The root of cauliflower is a fleshy stem, and there are many small protuberances called cryptic bud clusters on each fleshy stem. Each cryptic bud contains six hidden buds, which are alternately arranged on both sides of the fleshy stem. Cryptic buds generally do not sprout, and only when the main and lateral buds are injured, they germinate small life. Split bud propagation according to this characteristic of cauliflower, the rhizome is distributed according to hidden bud clusters, and intentionally cut open with a knife. Through culture, hidden buds germinate and grow a new plant in one month. Features: strong technology, high reproduction coefficient, so it is necessary to choose the rhizome with strong vitality, rapid development, high survival rate and short life. In general, a single plant can be divided into 4-10 plants, old cauliflower per mu through bud propagation, can be newly planted yellow flower 4-6.70 hectares.

1. Budding technology:

Bud propagation can be carried out throughout the four seasons, preferably in the spring and autumn, shaking off the soil of yellow flowers, removing withered leaves and hairs, exposing the main side buds, and cutting seeds according to the location of hidden bud clusters. ⑴ crosscutting method. The rhizome was cut transversely from the annual scar under the main bud with a knife, and then cut from the annual scar or every 1-2cm in turn from top to bottom. The rhizome was divided into several segments with 1-3 bud clusters in each segment. ⑵ oblique cut method. Use a knife to cut off the main bud at an angle of 45 °from the connection between the main bud and the lateral bud, then obliquely cut the lateral bud at an angle of 45 °in the opposite direction, and so on.

Either way, there are 1-3 fleshy roots with 3-7cm in each segment, providing nutrition for germination and germination.

2. Cultivation methods:

⑴ planted the seed directly in the field. Land preparation for border, application of farm fertilizer 5000 kg, nitrophosphate fertilizer 40 kg, border width 2 meters, 2 rows per row, large row spacing 80 cm, plant spacing 50 cm to open holes. Put 3-4 seed blocks in each hole, bud upward, root extended downward, covering soil 3 cm, watering foot with small water after planting, and covering film after water infiltration. In order to release seedlings after January, it is necessary to strengthen the management of seedling stage to achieve early and strong seedlings.

⑵ raised seedlings before transplanting. The cut seed blocks were planted on the seedbed with a row spacing of 15 cm and a plant spacing of 10 cm. There were 45000 seedlings per mu with a seedling age of 2 months, which could be transplanted into the field. This method has the advantages of fast germination, strong seedlings and high survival rate.

3. Seed breeding method

1. Seed selection. Select the cauliflower which is robust, disease-free and planted for 5-8 years. 5-6 sturdy buds are left on each stalk in the early flowering stage, which can bear fruit and be used as seeds. The rest of the buds continue to be picked and sold as commodities. The yellow flower used for seed collection was sprayed with 2000 times amino acid solution every 7-10 days and sprayed 2-3 times. When the fruit was ripe and slightly cracked at the top, it was taken off and threshed. Put the seeds in a ventilated and dry place and keep them well.

2. Raising seedlings. Select sites such as sunny beds or greenhouses, use fertile vegetable garden soil as seedbeds, and disinfect the soil. The seeds were soaked in 25 ℃ warm water for 48 hours. When sowing, 200 kg of rotten and sifted organic fertilizer is applied to each border (1.50-7 m). After leveling the border, pour enough bottom water, and after the water seeps, the row spacing is 15 cm, the plant spacing is 3 cm, the ditch point is planted, and the soil is covered with 2 cm after sowing. Using the sunny border to raise seedlings, a small arch stalk cover film can be inserted on it. The temperature in the greenhouse can be maintained at 25 ℃ during the day and no less than 12-15 ℃ at night. The seedlings can emerge in one week, and gradually decrease the greenhouse temperature after emergence to adapt to the external climate and prevent the seedlings from overgrowing. In the seedling stage, the field management should be strengthened to keep the soil moist. Pay attention to disease prevention and pest control, ploughing more, and spraying some foliar fertilizer to promote the growth and development of cauliflower seedlings and cultivate large and strong seedlings for transplanting in the coming year.