Planting time of Purple Potato

Purple potato is also known as black potato, vetch potato and so on. The meat of purple potato is purple to dark purple. It is planted in Guangdong, Guangxi, Hunan, Hubei, Fujian, Sichuan, Yunnan, Guizhou, Shandong, Jiangxi, Shaanxi and other places. It has high edible value and is one of the main raw materials of anthocyanins. Let's take a look at the planting time of purple potato.

Planting time of Purple Potato

Purple potatoes are usually planted in mid-February. When the temperature reaches about 15 degrees in mid-February, you can come out of the cellar to raise seedlings, first make the seedling bed, put the seeds horizontally on the seedling bed, the row spacing is about 5 centimeters, cover the fine soil, spray the soil with a sprayer, cover the mulch, cover the sky film, moisturize and keep warm, and when the buds grow to more than 20 centimeters, you can cut them into the field. Planting purple sweet potato is required to be harvested in mid-and late October, while fresh purple sweet potato is delayed to early November and must be harvested before frosting. Before storage, clean the potato cellar, remove the topsoil and disinfect it. Before entering the cellar, the purple sweet potatoes should be sunburned for 1 or 2 days to make the wound heal. During storage, attention should be paid to ventilation and humidity reduction in the early stage and heat preservation and moisturization in the later stage.

Planting Environment of Purple Potato

Purple potato prefers warm climate. The suitable temperature for stem and leaf growth is 18-25 ℃, and stops growing when the temperature is below 15 ℃. The optimum ground temperature for root growth is 22-24 ℃, and stops expanding when the ground temperature is below 20 ℃. It is a short-day crop, which needs sufficient light and high intensity. during the growth period, the suitable soil moisture is 60%-80% of the maximum field capacity.

Variety Classification of Purple Potato

1. Jizishu 1: Jizishu 1 was bred by crop Institute of Shandong Academy of Agricultural Sciences and approved by Shandong Province in July 2012. The outstanding characteristics are "three high", one is high anthocyanin content, the average content is 76.38 mg / 100 g fresh potato, the second is high dry matter and starch content, 36% 40% dry matter content, 25% Musco 27% starch content, and the third is high yield potential. Through measures such as plastic film mulching, formula fertilization, chemical control during the growing period, effective prevention and control of diseases and insect pests, standardized and large-scale planting can be realized, and the yield potential of this variety can be brought into full play.

2. Jishu 18: Jishu 18 was bred by crop Research Institute of Shandong Academy of Agricultural Sciences, with a yield of more than 3000 kg per mu.

3. Guangshu 135: Guangshu 135 was bred by Guangdong Academy of Agricultural Sciences with a yield of 2000kg to 2500kg per mu.

4. Ningzi 4: Ningzi 4 was bred by Grain and Oil crop Research Institute of Jiangsu Academy of Agricultural Sciences, with a yield of about 500 kg per mu.

5. Jingshu 6: Jingshu 6 is a cross between Brazilian sweet potato and Chinese sweet potato, with long stem, purple skin and meat, high sweetness and good quality. the yield per mu is 1500 ~ 2000 kg, and the drying rate is high, which is mainly used for deep processing and pigment extraction.

6. Purple potato king: purple potato king has high yield, excellent quality, purple skin color, purple meat color, rich selenium element, sweet and waxy taste and delicate meat. It is an excellent variety of sweet potato for fresh food and health. It is especially suitable for making sweet potato sauce, sweet potato paste, fried potato chips and so on. It is the first choice for making series of purple potato leisure health food.

7. Japanese Lingzi: Japanese Lingzi is a new variety of sweet potato introduced from Japan in recent years. Its leaves are purple-green, the top three leaves are purple-red, the petiole of the vein is all green, the leaf is heart-shaped, the leaves are shallowly engraved, the vine is about 1.5 meters long, and there are few branches in the basal part. The potato is long spindle-shaped, the skin color is purple-red and bright, the flesh color is purple-black, it is nearly black after ripening, sweet flour sand, rich in anticancer substance selenium, iodine and other elements, and its nutrition is several times higher than that of other sweet potatoes. It is the blackest variety in the current black potato series. It is a good variety for deep processing such as fresh food, health care and pigment extraction. It has strong disease resistance and storage resistance, drought resistance, barren resistance and adaptability. General yield per mu: 3000 kg of spring potato and 2000 kg of summer potato.

8. Qunzi No.1: developed by Henan Academy of Agricultural Sciences, it has short vines, many branches and high vegetable yield. The output is high. The yield of spring sweet potato is more than 3000 kg per mu and that of summer sweet potato is about 2000 kg.

9. Yuzi 263: cultivated by Zhejiang Academy of Agricultural Sciences, the yield is about 2000 kg, with delicate meat, less fiber, high sugar content and good taste. It is a good variety to eat.

10. Xu Zishu No. 1: entered the production experiment of sweet potato varieties in Jiangsu Province in 2003. After more than 20 times of trial planting and identification in five years, "Xu Zishu 1" is a new variety with high yield and purple meat. The yield of fresh potato is more than 2000 kg per mu, which is 3 to 5 times higher than that of Japanese purple heart varieties such as "Yamagawa Zi" and Ayamurasiky. This variety has red skin and purple heart, cooked potato meat is purple and bright, and has a good taste. The suitable density per mu is about 3300 plants. It is more tolerant to late planting, and waterlogging has a great effect on the yield. It is suitable to be planted in the north of China and most of the middle and lower reaches of the Yangtze River.

11. Nanzishu 008: Nanzishu 008 is a new variety bred by the Academy of Agricultural Sciences of Nanchong City, Sichuan Province. this variety has purplish red top leaves, green mature leaves, medium size, long spindles, purple skin, purple flesh, smooth potato skin, beautiful potato shape and excellent cooked food quality. In spring, the yield of fresh potato is about 19500 kg / ha, and that of rattan leaves is about 31500 kg / ha. The fresh potato and rattan leaves are 9750 kg / ha and 12750 kg / ha respectively in autumn. The cultivation of this variety in autumn can not only increase the yield of fresh potato, but also provide fresh green feed for aquaculture in autumn and winter.

12. Zhe Zishu No. 1: Institute of crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, in 2007, the provincial sweet potato variety comparison test showed that the average yield of fresh potato per mu was 2148.7 kg, which was 49.7% higher than that of control Yuzi 263, reaching a very significant level. The variety has good sprouting ability, vigorous growth in seedling stage, long stem, heart-shaped toothed leaves and green leaves. The tuber is concentrated and has a large number, the average number of tubers per plant is 5.1, the average weight of single potato is 106.1 grams, and the proportion of medium potatoes is 58.7%. Potato spindles or long spindles, purple potato skin, purple potato meat, smooth skin. The dry matter rate of potato chips is 35.3%, and the cooking taste of fresh potato is sweet and powdered. The resistance was identified by Xuzhou National Sweet Potato Research Center as high resistance to stem nematode, root rot and vine cutting, medium resistance to black spot and good storage resistance.