Key points of spring seed collection techniques for cabbage protection

Cabbage is a cross-pollination crop. It is similar to the flowering period of rapeseed, mustard, and sorghum. It is also easy to cause biological confounding to degrade the variety. In order to reduce the losses caused by the mixed varieties, the cabbage seeding method was tested for many years, and a set of techniques for the vernalization of cabbage protection sites was explored.

The protected land can be harvested at 83kg per acre, and the exposed land can be harvested at 48kg per acre. In terms of experience and benefits, the cost is removed, and the protected land per acre is about 500 yuan more than the open land. Furthermore, the cultivated cultivation can be cultivated earlier than the open field. ~5 days, can be harvested before the rainy season, timely meet the production of the species, and the seed quality is better than the open field cultivation. The specific technical points are as follows:

1. The germination vernalization treatment time is mid-February, soak the cabbage seed with 30~40°C warm water for 3~5 hours, then remove the control water, and germination at 20~25°C, when the seed will have 1/10 When placing the left and right arches, put them into the vegetable dish and lay them on the warm cloth in the wooden plate; the thickness is 2~5cm, the humidity is kept above 80%, the temperature is controlled at -1~1°C, and the time is 20~30 days. At this time, attention should be paid to the prevention of freezing damage, because the temperature is very low at this time, and it is also necessary to prevent rodents.

2. Sowing is planted in the greenhouse in mid-March. Before planting, level the greenhouse in the greenhouse, smash it, or sown it in a wooden box. The bottom water was poured before sowing, and the seeding amount was 10 g/m 2 . After sowing, the temperature should be higher during the period before emergence, 30~35°C during the day and 20°C at night, which is good for seed excavation and reduce the nutrient loss in the seed, so that the seedling can be strong when it is unearthed. When the seeds are unearthed, the temperature should be appropriately lowered. The daytime temperature should not exceed 25 °C, and the nighttime should not exceed 15 °C. Before the real leaves will come out, try not to give water, in case the seedlings are long.

3. Transplantation into the hotbed in mid-April, the specification is 810cm. Spraying urea and diammonium mixture twice during the management of the trampoline, the concentration is 0.5-0.8%, spraying potassium sulfate 3 times, the concentration is 0.4%, which provides the required nutrition for the normal growth of the seedling; The growing vegetable seedlings should be timely water, loose soil, weeding, and promote the seedlings to be strong. The temperature at night should be as low as possible, so that the seedlings should not be frozen. During the daytime, the weather should be ventilated and smelted. Especially at noon, attention should be paid to avoid high temperature baking. A few days before planting, the agricultural film of the arch shed should be removed, so that the seedlings can be further exercised, so that they can adapt to the climatic and environmental conditions of the field after planting, thus maintaining the survival rate of colonization.

4. Planting will be planted in early May. Seedlings should be removed before planting. The field of planting seedlings should be flattened and squashed first, and the film can be applied without any film. The row spacing of the planting elbow was 2070cm, and the seedlings were 4,770. When planting, the ratio of diammonium and potassium sulfate was mixed to 12.5kg/mu as the base fertilizer. When planting, water is poured and sealed, so that the seedlings do not fall. When planting seedlings, it is best to choose sunny and hot weather, which is more conducive to the survival of the seedlings.

5. Field management begins on May 20th and flowers are fully open on June 9. 1 time before the initial flowering period after colonization. Before the beginning of the flowering period, it is strictly necessary to remove the impurities, so that the purity of the cabbage seeds can meet the requirements of the species used in production. Spraying Omethoate 2 times in the flowering period to control the aphids, which is good for the early maturity of the seeds.

6, harvested in early July, at this time is the rainy season, bringing some difficulties to drying. Therefore, in production, we should try to cultivate as early as possible, and take early harvest as appropriate.

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