An improved variety of Huaishan potato-- Guihuai 6

Variety approval No.: Guixianshu 2004006

Breeding unit: Institute of Economic crops, Guangxi Academy of Agricultural Sciences

Variety source: the Huishan germplasm resources collected from Hongshi Village, Yangmei Town, Rong County were selected by systematic breeding.

Institute of Economic crops, Guangxi Academy of Agricultural Sciences

Characteristics: it is an early-maturing variety with a growth period of 170-190 days in central and southern Guangxi. Stem right-handed, quadrangular, diameter 0.4cm, stem wing obvious, unarmed, without purple, main stem 3.0-4.5m long; broad leaf, main stem leaf length 15.0-18.0cm, width 10.5-12.0cm, broad heart-shaped, base deep heart-shaped, apex acute, leaf color light green, smooth, thin, waxy layer not obvious, no gloss; reticulate veins, basal veins 7-9, petiole ends purplish red The lower part of the inflorescence is alternate, the middle and upper parts and branches are mostly opposite, a few are alternate, and the axils of leaves are not long or less than zero seeds. Potato is long cylindrical, 70.0-85.0cm long, potato weight per plant is 0.8-1.3kg; root hairs at the base of potato are more, root hairs at the top are less and short; potato skin is bright red and smooth; potato cross-section is white; viscosity is good. The zinc and iron contents of 7-month-old dry tubers were 20.2mg/kgDM and 12.0mg/kgDM, respectively, the copper (Cu) content was 7.17mg/kgDM, starch content was 70.5%DM, crude protein content was 11.2%DM, total amino acid content was 7.83%DM, total saponins 0.72%DM, total soluble sugar content was 26.3%DM, crude fat content was 0.28%DM. The water content of fresh potato is 78.8%.

Yield performance: in the product comparison test conducted in Nanning in 2002, the average yield was 1856.3kg/667m2, which was 24.61% higher than that of the control variety (from Yangmei Town, Rong County); in the retest in 2003, the average yield was 1760.3kg/667m, which was 24.87% higher than that of the control. The production demonstration was carried out in Rong County, Luzhai and Beiliu in 2003, and the average output was 1665.2kg/667m2, 1782.7kg/667m2 and 1755.4kg/667m2, respectively.

Main points of cultivation techniques: 1. Choose sandy loam soil with convenient drainage and irrigation and deep soil layer. 2. Choose disease-free and insect-free potato pieces as seeds, cut according to 5cm-8cm, the large potato pieces can be cut into two pieces longitudinally, and then dip the cut with plant ash. 3. Planting method and density: according to row spacing 1.3m-1.5m, deep trench, back soil for high ridge, border height 30-40cm, width 60cm, hole filling sand around 20cm, hole depth 80-100cm. The potatoes are planted in the sand hole. The suitable sowing season is from early March to early April in southern Guangxi and from mid-March to mid-April in central Guangxi. Plant 2500-3000 plants per 667m2. 4. Fertilizer and water management: per 667m2, mature farm fertilizer 1000-1500kg or compound fertilizer 40-50kg was used, and calcium superphosphate 50kg was used as base fertilizer. Set up and draw vines in time after emergence, trim lateral branches and weed properly in the middle growth stage, apply manure once with seedling height of 10-15cm, apply compound fertilizer of 7.5kg / 667m2 in the middle stage combined with weeding and soil cultivation, and pay attention to the application of compound fertilizer and water for 2-3 times in the peak stage of potato expansion. Keep the soil moist throughout the growing season. 5. Pay attention to the prevention and control of black spot, anthrax, Spodoptera litura and other diseases and pests.

Autonomous region quality Review Committee approval opinion: after examination, this variety has a good application value in production, through examination and approval, it can be planted according to local conditions.