Wanchuan No. 58 (potatoes)

The main results are as follows: (1) Variety source: it was bred by crossing 67-12 as female parent and Ning 180 as male parent by Dachuan Agricultural Science Institute of Sichuan Province and Chongqing three Gorges Agricultural Science Institute.

(2) characteristics: precocious medium vine type. Top green with brown edge, mature leaves green, heart shape light simple, vein light purple, vein purple; leaf size 11.4cm; vine green, node purple; vine tip velvet; vine length 100-150cm, thick 0.5cm, branches 4-6, plant type semi-erect; no natural flowering habit; potato spindle-shaped, skin color purplish red, flesh color yellow, bud eyes light The drying rate is 23-26%, the quality of cooked food is good, the tuber is early, the tuber per plant is 4-6, the rate of large and medium potato is more than 80%, drought and barren resistance, disease resistance is better than the control, resistant to storage.

(3) yield performance: in the precocious group of provincial and regional trials from 1996 to 1997, the average yield of fresh potato was 1488.6 kg per mu, 12.3% higher than that of Nanshu 88, 1829.4 kg per mu and 0.4% higher than that of Nanshu 88, and the provincial production test in 1998 showed that the average yield per mu was 1457. 6 kg, an increase of 16.3%; a yield of 2056.9 kg per mu of rattan leaves, an increase of 11.4%.

(4) cultivation points: early sowing and early planting of ①: seedling raised by plastic film mulching from the end of February to the beginning of March, and planted in the middle and late May. ② density: net cropping 4800-5200 plants / mu, intercropping 3500-4000 plants / mu. ③ is mainly organic fertilizer, heavy application of base fertilizer, increased application of phosphorus and potassium fertilizer, and pay attention to the control of diseases and insect pests.

(5) suitable planting areas: Pingba, hills and mountain slopes can be planted or intercropped in Sichuan and Chongqing.