Qingshu No. 2 (Potato)

Variety source: the crop Institute of Qinghai Academy of Agricultural and Forestry Sciences was selected from Minamata of Plateau No. 4 / Magura formation in 1992 (formerly 92-32-8). In November 1999, it was approved by Qinghai crop Variety approval Committee and named Qingshu No. 2. The yield ranked first at 5 points in the regional trial of Qinghai Province for 2 years. Among them, the average output in 1997 was 33197.55 kg / hm2, an increase of 21.1% over the control Jiushu 202, and 37467.0 kg / hm2 in 1998, an increase of 91.3%. In the production test, the average output in 1997 was 45544.5 kg / hm2, which was 44.8% higher than that of the control Qingshu 169; in 1998, it increased by 36.4%, 90.5%, 53.6% and 57% respectively. When 1.73hm2 was planted in Boyuan County in 1998, the average star yield reached 62880.0 kg / hm2 and 71236.5 kg / hm2, which was 90.54% higher than that of the control Qingshu 168. Characteristics: the growth period is 120 days, which is a late-maturing variety. The plant type is erect and the plant cluster is luxuriant. The growth is strong. The plant height is 90 cm. The stem is 1 cm in diameter, the number of main stems is 2-3, and the branches are few. The leaves are dark green. Corolla pale purple. There are few natural berries. The stem is green. The potato pieces are round. The skin is smooth, white skin and white meat are tight, and there is no hollow. The budding eyes are shallow. Sweet potatoes are concentrated. Long dormancy, resistant to storage. There are 4.5-5.1 tubers per plant and the yield is 0.85-0.91 kg. A single potato weighs 0.1 kg. The tuber contains 22.86% Mel 25.83% powder, 100g C20.92mg/, 1.66% crude protein and 0.6267% reducing sugar. Steamed food has good taste. It is more resistant to drought, cold, salt and alkali, and has wide adaptability. Resistant to late blight, ring rot, black shank, mosaic and mosaic virus, and light to early blight. The per unit yield of small land planting is 37500-45000 kg / hm2, that of semi-shallow brain mountain is 30000-37500 kg / hm2, and the highest is 62880 kg / hm2. Key points of cultivation: select the land with deep, fertile, loose, good air permeability and moderate water retention and permeability. The base fertilizer is mainly based on household fertilizer, combined with the application of N, P, K fertilizer. The suitable sowing date is in the first and middle of April. The sowing rate is 150-200 kg / 667 square meters. The plant spacing is 25 cm 30 cm and the row spacing is 70 cm. It can also be planted in wide and narrow rows, 80-100 cm wide and 25-30 cm narrow. Intercropping with broad beans is also possible. It is suitable for planting in the northern one-season planting area, especially in the remote areas where potato processing and transportation are convenient, the production and marketing are right, and great economic benefits can be created. It is also suitable for planting in agricultural and Sichuan water areas and high and middle areas at an altitude of 1600-3000 meters.