Potato Plateau No. 7

Variety source: Qinghai Academy of Agricultural and Forestry Sciences used "Gaoyuan No. 4" as female parent and "Gaoyuan No. 3" as male parent in 1967, bred and named in 1972, began to popularize in 1973, and continued to be popularized by Qinghai crop Variety approval Committee in 1978.

Main characters: plant type erect, plant height about 80cm, stem green, leaves green, compound leaves large, lateral leaflets 4-5 pairs; inflorescence peduncle light green, Corolla white, stamens yellow, stigma 3-lobed, petiole nodes colorless and naturally sterile: tubers oval, yellow flesh, smooth epidermis, large and neat tubers, concentrated tubers The base of semi-light bud is oval and purplish red, the top is obtuse and light purple, the dormancy period of tuber is very short, and the storability is medium. Mid-late maturity, growth days of about 120 days; medium steaming quality; processing quality: dry matter 20.9%: 29%, starch 14.2% 18.3%, reducing sugar 0.2%; crude protein 1.53%, vitamin C7.7 mg/100g; slightly susceptible to late blight, more resistant to ring rot, more resistant to waterlogging; in irrigated land in the northwest plateau, 667 square meters of yield is 2500~3000kg, high yield can reach 4000kg, dryland 1500~2000kg.

Suitable for planting areas: mainly distributed in Qinghai, Gansu, Ningxia, Shandong, Jiangsu, Henan and other places also cultivated.

Key points of cultivation techniques: this variety has high yield and early tuber bearing, which requires field management in plots with good conditions of bottom fertilizer, water and fertilizer; sturdy plants are suitable for planting with equal row spacing, and the density of paddy land is 667 square meters. 3500 plants, 3500 plants in dry land, 3500 plants in dry land; the dormancy period of tubers is very short, which is suitable for cultivation in the second cropping area. Sprouting treatment is needed before sowing to break the dormancy period and promote Miaoqi. The tuber has thin epidermis, easy to be injured and slow to heal. Attention should be paid to reduce bruising during collection and transportation.