Quanshu 76

Variety source: Jinshan 57 × Taishu 66

Characteristics: the short vine of this variety is semi-erect, the vine is equal to thick, the leaf shape is shallow and engraved, the top leaf is green and brown, and the leaf vein is light purple. There are 8-10 branches per plant and 3-5 tubers per plant, which are uniform in size, neat and concentrated, and the rate of large and medium potato is high. Potato spindles, yellow potato skin, yellow potato meat. The sun-drying rate of potato pieces is 28%, the flour yield is 16.9%, which is 1.9% higher than that of Jinshan 57, and the eating quality score is 82.3, 2.3 points higher than that of Jinshan 57, and the taste is better than Jinshan 57. Resistant to vine cutting disease and moderately resistant to potato blast.

Yield performance: high yield, stable yield, disease resistance, high starch yield. This variety participated in the sweet potato regional trial in Fujian Province from 2004 to 2005. the average fresh potato yield in two years was 2455.35kg/ mu (1 mu = 1/15hm2), which was 1.1% lower than that of the control, the average dry potato yield was 697.8kg/ mu, 6.3% higher than that of the control, and the average starch yield was 415.3kg/ mu, 11.88% higher than that of the control.

Main points of cultivation:

The main results are as follows: (1) keep seeds strictly and cultivate strong seedlings. It is better to choose the late potato with good tuber per plant, standard potato shape, no diseases and insect pests, no injury, medium-sized late potato, or virus-free potato. After potato emergence, the management of grass, water, fertilizer and temperature should be strengthened, sick and rotten potato blocks and their seedlings should be removed in time, seedlings should be cut or buds should be cut in time, and water and fertilizer management should be strengthened.

(2) selecting reasonable plots and applying sufficient base fertilizer. Quanshu 76 has better adaptability, but the rotation plots with deep sandy loam and better water conservancy conditions can give full play to its yield potential. Combined with the application of organic fertilizer per mu (taking high-quality rotten pig manure as an example) 2000~4000kg and ternary compound fertilizer 30kg were deeply ploughed into the soil.

(3) oblique planting of short potatoes, proper close planting and early planting. Using 15cm, the potato seedlings were inserted into 2-3 nodes of the soil, which formed an oblique angle with the ground, and the tip of the seedlings exposed 3-4 nodes of the ground. The medium and short vine of Quanshu 76 is semi-erect, the leaf layer distribution is reasonable, the light and air permeability is good, the population yield can be increased by properly increasing the planting density, generally planting 3500 trees per mu. Generally, the early potato is planted in May, and the late potato is planted in front of the big department.

(4) do a good job in field management. The seedlings were checked 4-5 days after planting, and the lack of seedlings was found to be replanted as early as possible. Depending on the soil moisture after insertion, irrigate (irrigate) water as appropriate. Nodding fertilizer was applied early, and urea 5~6kg/ mu was applied 5-7 days after planting. Combined with heavy application of weeding in mid-tillage and early application of edge fertilizer, N-P-K ternary compound fertilizer 40kg and urea 10kg were applied to each mu within 30 days after planting. In the early and middle stages of growth, according to the soil moisture and aboveground growth status, appropriate irrigation (watering) and foliar fertilizer should be applied, and waterlogging prevention and drainage should be done in the later growth period.

(5) strengthen the prevention and control of diseases and insect pests. The main diseases of sweet potato are sweet potato vine cutting disease, potato blast and virus disease, and the main pests are sweet potato weevil, Spodoptera litura, red spider, whitefly and so on. The prevention and control of diseases and insect pests should follow the plant protection policy of "prevention first, comprehensive control", and adhere to the principle of pollution-free control, which is dominated by biological control and physical control, supplemented by chemical control.