How to choose rapeseed? What are the methods of raising seedlings?

At a specific time of year, many scenic spots take patches of rape fields as a major selling point, so now more people plant rape flowers than before. So how to choose rapeseed seeds? What are the methods of raising seedlings?

How much is the price of rapeseed per jin?

As we all know, the price of rapeseed oil is not cheap now, but rapeseed is not as expensive as expected. The cheaper ones are one or two yuan per jin, and the more expensive ones are four or five yuan per jin.

What are the varieties of rape?

1. Dwarf hybrid one

It was approved by the National crop Variety approval Committee in 1989 and named GS Aiza No.1. This variety is a hybrid bred by the Department of Horticulture of Nanjing Agricultural University and Nanjing vegetable Research Institute using the sterile plant of the dwarf yellow male sterile line and the short white stem inbred line. The plant height is 40cm to 45cm, the development degree is 40cm to 50cm, and the plant type is erect with a microwaist. Leaf blade oval, light green. Petiole white, flat to semiorbicular, 10 × 14.5 cm long and 3.5 × 5.5 cm wide. The weight of a single plant is about 0.5 kg. It is a precocious species. The tender fiber is less, the taste is light, and it is more heat resistant.

two。 Slow in April

Varieties of farm families in Shanghai. The height of the plant is 20 cm 24 cm, the degree of development is 30 cm 35 cm, and the plant is erect with waist. The diameter of the vegetable head is 9cm to 10cm. The leaf is oval, 12-15 cm long and 10-13 cm wide, dark green, smooth and thick. Petiole green-white, flattened and slightly concave, thicker, petiole 6-8 cm long, narrowly upper and lower wide. The weight of single plant is 0.5 × 0.75 kg, and the yield of 667 m ~ 2 is 1000 ~ 1500 kg. Strong cold resistance, late bolting, less crude fiber and good quality. After planting in spring, it will be harvested in about 45 days, and about 40 days after sowing in autumn.

3. Ladyfish is a variety of farm dishes in Nanjing. Belongs to the collapse vegetable class, the plant half collapses the ground. The leaves are dark green, folded, petiole white, and the heart leaves are yellow-green and green. In winter, the heart leaves can be rolled inside to form a small ball, which is yellow and green inside and outside, with distinct color, unique shape, good quality, slow growth and strong cold resistance.

4. Nannong dwarf foot yellow

The seedlings of Nanjing dwarf yellow diploid were induced by colchicine, and then a new autotetraploid rape variety was bred by identification and selection for many years. The plant height of this variety is 28.8 cm, and the degree of development is 31.7 cm. The average number of leaves per plant is 20, and the largest leaf is 22 cm long and 19 cm wide, nearly round and emerald green. Petiole white, 9 cm long, 1.4 cm thick, semicircular peduncle. The weight of single plant is 485 grams and the growth period is 60-80 days. The output of 667 m 2 is 2000kg to 2500kg. Excellent quality, sweet and crisp flavor and fresh and tender. It has strong cold resistance, no serious freezing injury under short time-5 ℃, late bolting and strong resistance to virus disease and downy mildew. Not resistant to storage and transportation, need to be on the market in time. This variety can be sowed and harvested by stages in autumn and can be raised or cultivated in greenhouse in winter and spring. It is more suitable for intercropping with fruits and vegetables in protected areas to improve economic benefits.

5. Qingbang rape

Good local varieties in Beijing. The plant height is 35.6 cm and the opening is 26.5-38.5 cm. The plant is erect, the whole plant has 15 to 20 leaves, the leaf is 13.6 cm long and 11 cm wide, the top of the leaf is nearly round, the front is dark green, the back is slightly light, the leaf surface is smooth and slightly glossy. Petiole 20 cm long, 2.7 cm wide, 0.37 cm thick, light green, erect upward, large base, waist-shaped, white wax powder on the surface of leaf and petiole. The weight of a single plant is 130g to 250g, and the maximum is more than 500g. Disease resistance, cold resistance are strong, more resistant to storage and transportation. The quality is medium. Every 667m 2 produces 2000kg to 3000kg. It is suitable for cultivation in open field in spring and autumn and protected field in winter. (source: China Agricultural Press)

3. Seedling raising methods of rapeseed

1. Selection of improved varieties

The replacement of degraded low-yield old varieties and the introduction and selection of improved varieties are the key measures to increase per unit yield, which should be selected according to local climatic conditions and variety growth period. For example, early-maturing varieties (growth period of about 120 days) can choose local rape varieties, medium-maturing and late-maturing varieties.

two。 Fine soil preparation

After the middle and late rice harvest, the soil was broken and ditched, requiring the border to be 1.5 meters wide, 12-17 centimeters high, fine and smooth, and open a good field ditch and surrounding drainage ditch.

3. Timely transplanting and reasonable close planting

The seedlings were transplanted in time when the seedling age reached 30-35 days, with a row spacing of 40 cm and a plant spacing of 20-27 cm. Planting 8000-10 000 plants per 667m2 for middle and late maturing varieties and 12000-14000 plants per 667m2 for early maturing varieties. Precocious species can also be planted on demand, with a hole distance of 27 cm × 33 cm, 5-8 seeds per hole, and 1 seedling later. Seedlings should be checked and filled in time after seedling cultivation and transplanting.

4. Scientific fertilization

Farm manure and phosphate fertilizer are required to be applied before sowing or transplanting after retting and ripening, 1000 kg of high quality farm manure and 20 kg-25 kg of phosphate fertilizer are applied every 667m2. Direct seeding rape with 3 true leaves can be combined with inter-seedling to apply attacking fertilizer, applying 4 kg-5 kg urea and 2 kg-3 kg potassium chloride every 667 square meters. For seedlings and transplants, 1000 kg of dilute dung water or 8 kg-10 kg of urea should be applied during the period of returning to green.

5. Scientific drainage and irrigation

Rape growth is afraid of both drought and waterlogging. in water management, drought can be irrigated and waterlogging can be drained, and the border ditch and four-week ditch should be kept unobstructed so as to facilitate drainage and irrigation. Water demand is large during bolting and flowering period, so water supply should be ensured. Attention should be paid to prevent waterlogging in the field at seedling stage and flowering and podding stage.

6. Timely harvest

About 30 days at the end of the full bloom of rapeseed, about 2% of the pods are yellow. when most of the seeds in the pods change from green to yellow or red, they can be harvested, threshed in the harvest stand for 1 day, dried in time and processed in time.

That's all for today's introduction on rapeseed. If you still want to know more about the price of rapeseed in 2020, you can continue to follow the update of Nongxun.

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