Pushu 503

Pushu 503 is a new variety of sweet potato with high quality edible and food processing raw materials, which is bred by two typical Chinese and foreign high-quality varieties (Dananfu X American L4-5). It was approved by Putian crop and Animal Husbandry Variety approval Committee in 2001.

Characteristics: Pushu 503 belongs to short and medium vine semi-erect type, with more branches per plant, medium stem diameter, heart-shaped leaves, and green stems and leaves. There are 3-4 tubers per plant, the root of tuber expands rapidly in the early and middle stage, most of them are spun in the shape of potato, the root of potato stalk is small, the root of soft tail is small, the shape of potato is beautiful, purple-red skin, orange meat. Drying rate 32-35%, starch rate 14-16%, soluble sugar 5.57%, vitamin C20.6 mg/100g, fresh potato cooking powder, fragrant, sweet, dry potato quality is good. As a kind of raw material for food industry, "Xinghua preserved potato" and other foods have been developed, which have beautiful color, delicious taste and rich nutrition. Potato pieces are resistant to storage, good sprouting, easy to raise seedlings, resistant to vine cutting, resistant to scab, and not resistant to potato blast. More resistant to moisture, less resistant to fertilizer, less resistant to drought and thin.

Yield performance: spring and summer cultivation, generally 2500kg per mu, autumn and winter potato cultivation, about 2000kg per mu.

Key points of cultivation: early and middle maturity should be harvested early, the growth period is 130-150 days, and late harvest should be supplemented to prevent premature senility; short vines are more fertilizer-tolerant, temperature-tolerant, drought-resistant and thin, the level of water and fertilizer management is on the high side, and the total fertilizer application is 10-20% higher than that of ordinary varieties. P, K fertilizer should be increased; severe plague areas can not be planted.