Chunshu No. 4 (Potato)

Breeding unit: Jilin vegetable and Flower Research Institute.

Approval: it was approved by Jilin Provincial crop Variety approval Committee in 1993 and by the National crop Variety approval Committee in 1997.

Variety registration number: GS05002-1997.

Variety source: Wensheng 4 X Kexin 2

Characteristics: the plant is erect and luxuriant, the plant height is about 90 cm, the stem is stout, the leaf color is dark green, the flower is purple, the growth potential is strong, the tubers are numerous and concentrated, the tubers are flat and round, the potato skins are reticulated, the tubers are formed early, oblate and round, the depth of bud eyes is medium, dry matter content is 24.5%, starch content is 15.9%, reducing sugar content is 0.46%, crude protein content is 1.63%. The content of vitamin C is 15.9 mg / 100 g. The growth period is about 135 days. It is a late-maturing variety with good storability, good taste and good quality. Potato meat has strong resistance to exposure, so it is suitable for quick-frozen food processing. It was highly resistant to late blight in the field, allergic to PVY, resistant to PSTV. Generally, the yield of fresh potato per mu is 2000ml 2500kg.

Key points of cultivation: adopt the method of high fertilizer and sparse planting, apply more than 3000 kg of organic fertilizer per mu, about 17 kg of diammonium phosphate, 3500 seedlings per mu, and the planting specification of 70 cm X 30 cm or 60 cm X 35 cm can be adopted.