New Potato Variety - Zhengshu No.9

Variety Name: Zhengshu No.9

Approved Code: Healing Potato 2009003

Breeding unit: Zhengzhou Vegetable Research Institute

Variety source: Early morning and white potato No. 1

Characteristics: early maturing varieties, fertility period of about 56 days. Strong growth potential, plant height about 44cm, the number of main stems per plant is about 1.2, short stems, stems green, light green leaves, white flowers, less flowers, strong. Potato wedges are oval, yellow and white, and the potato skin is smooth and the buds are shallow. The tubers were neat and the number of tubers per plant was about 2.2.

Identification of resistance: Three field surveys from the Institute of Plant Protection of Henan Academy of Agricultural Sciences from 2007 to 2008 identified: anti-roll leaf virus disease, mosaic virus disease, anti-ring rot, anti-late blight.

Quality Analysis: The Agricultural Products Quality Supervision, Inspection and Test Center (Zhengzhou) of the Ministry of Agriculture detected that the vitamin C content was 25.2 mg/100 g, which was significantly different from the control Zhengshu No.5 (13.9 mg/100 g); the starch content was 11.8%, lower than that of the control Zheng Potato No.5 (13.4%); reducing sugar content was 0.32%, which was higher than that of Zhengshu No.5 (0.09%); protein content was 2.52%, higher than Zhengshu No.5 (1.98%).

Production performance: In 2007, the province's regional trials had an average yield of 1087.3kg, an increase of 20.2% compared with the control Zhengshu No. 5. In 2008, the trial yielded an average yield of 1333.4kg per mu, an increase of 17.4% over the Zhengbus No. 5 control. In 2008, the provincial production test had an average yield of 1201.1kg per mu, an increase of 18.7% over the Zhengshu No. 5 control.

Appropriate areas: the province's second season for cultivation and a quarter for early maturing.

Cultivation Techniques:

1. Sowing date: spring open field cuttings are planted in the middle and early March, 120kg per mu, harvested in mid-to-late June, mulching can be planted in the middle or late February, harvested in late May and early June, and planted in the middle and early August. With about 50g of healthy small whole potatoes soaked with gibberellin germination sowing, row spacing 60cm, spacing between 20-25cm, harvested in mid-November, the amount of autumn acres with 250-300kg.

2. Field management: Choose sandy loam soil for planting and avoid planting in alkaline soil. Pay attention to ridicule. Strengthen early-stage fertilizer and water management and field management. Earthing before ridge closure. Stop watering 10 days before harvest to facilitate harvest storage.

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