Large-leaf potato cultivation technology in the United States and Canada

The United States and Canada No. 1 potato is a special processing type imported from the United States by Taiwan's "Secret-Wan" Biological Co., Ltd., which is suitable for the production of ocean car films, potato mud, and potato cooked powder. This variety began its successful demonstration and promotion in the Qingdao area in 2001. The quality indicators of the products meet the processing requirements, and the products are in short supply. Features: US and Canada No. 1, large leaf varieties, plant type upright, plant height 70--80cm, seedling growth is strong, green stems, stout, compound leaves large, white flowers. Tubers are long strips, smooth surface, yellow skin, white meat, diameter 8cm, longitudinal diameter 15cm, single weight about 250g, skin thin shoots less and shallow eyes, not crisp after frying, forming fast. The dry matter content of starch was 19.1%, and the amount of raw sugar was 0.15%. Hi sandy loam, humid climate, more resistant to virus disease. Cultivation techniques: The variety is grown in the Shandong peninsula in about 105 days and can be planted in spring and autumn. Spring sowing is planted on April 5th - 20th and harvested on July 20th - August 15th. Autumn sowing is planted in mid- and late July and harvested on October 15-30. Selecting land preparation: Generally, there is no need to plant land before harvesting vegetables. The land is required to be flat, deep over 20cm and applied with 750kg/ha of compound fertilizer, and appropriate to kill underground pests and bactericidal pesticides such as phoxim and geocidal net. Seed preparation 1. Cut seeds. Usually one bud cuts one piece. 2. Soaking. On the day when the seeds are cut, they are soaked for 2 to 3 minutes with 1000-time antivirus vines, spread out, and must be sown on the second day. Sowing: After April 5, sowing, planting methods ridge width (ie ditch to ditch) 120cm, ridge height 20cm, row spacing 40cm, spacing 30cm, and between the rows and rows applied compound fertilizer 50kg/666.7 square meters Note: The ridge width must be 120cm, double row planting, which is convenient for mechanized harvesting. Field management: 15 days after sowing, all the tubers are tied with white roots. At this time, you can pour the first water and avoid watering too early. If there are individual pieces of potatoes that do not take root, do not water it to prevent the rot of the seed potatoes. After the potato was watered, the potato was usually watered 4 times during the entire growing period, depending on local rainfall. The potato needs the most water during the flowering period and should be watered 1 time before the flowering period. Harvest: 7 days before harvest, herbicide is sprayed without trace, forcing the nutrient to be transferred to the tuber. When harvesting, try to avoid tuber damage, prevent sunlight from prolonged exposure, minimize loss, and obtain good benefits.

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