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Turnip, also known as turnip, round root and cabbage, is a biennial herb. Turnip has a long history of cultivation in our country. In the book "Letter to Yu Gong", it is recorded that "Jingzhou Bao Yi Jing Mao" and "Jing" is also a turnip. It has been cultivated in China for more than 3 years.

1. Characteristics

The fleshy root bark of turnips can be divided into white, light yellow and purplish red, with oblate, round and conical shapes, white or light golden yellow flesh, winged petioles, prickly leaves and leaves with mosaic and plate leaves. The fleshy root usually has 12-14 leaves at the swelling stage. Turnip is easy to cross naturally with Chinese cabbage, Chinese cabbage, moss, black cabbage and cauliflower. Attention should be paid to isolation when reserving seeds.

Turnip likes moist sandy loam, which requires more phosphorus and potassium fertilizer. It has certain cold resistance, seeds can germinate at 2-3℃, seedlings can tolerate low temperature of 2-3℃, and the optimum temperature for fleshy roots is 15-18℃, and there is a temperature difference between day and night.

Second, the nutritional value

The fleshy roots of turnips are rich in nutrition, and the dry matter content is high, generally 9.5%-12.%. Every 1g of edible part contains 1.4g of protein, .1g of fat, 6.3g of carbohydrate, 41mg of calcium, 31mg of phosphorus, .5mg of iron, .7mg of thiamine, .4mg of riboflavin, .3mg of niacin and 35mg of vitamin C. Turnip's fleshy root tissue is tender and dense, and it has a good cooking flavor. It can be used as a substitute for grain, as well as for salting and frying.

Turnip is warm and pungent, which can benefit the five internal organs, lighten the body, replenish qi, stimulate appetite and detoxify.

third, cultivation techniques

(a) land preparation? The main product of Wupu is fleshy roots, so organic matter should be selected. Cultivation of sandy loam with high quantity, looseness and good irrigation and drainage. Tilling after harvesting, applying 2-25 kilograms of manure per mu as base fertilizer. Then break it and rake it flat to make a bed.

(2) raising seedlings? Sowing date is closely related to yield. Premature sowing affects yield and quality. Straight rice is generally used in the north. After seedling emergence, the seedlings are interplanted twice between the first true leaf and the third to fourth true leaf. In the south, seedlings are transplanted and planted before and after the summer heat. Generally, the sowing amount per mu of seedbed is .75-1 kg, and 15,-18, seedlings are bred, which can be used for field cultivation of 5-6 mu. The ground should be kept moist after the seeds fall to the ground, which is beneficial to the emergence of seedlings.

(3) field management? Seedling transplanting should be done after 5 pm, or on cloudy days, so that soil moisture is more and evaporation is less, and it is easy to survive. In the field management during the whole growth period, the water should always keep the ground moist. The principle of diligent application and thin application should be mastered in the harvest period. The concentration can then be gradually increased.

The harvest period is similar to that of winter radish. Please refer to the section on radish for the way of winter storage.