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Journal of Agriculture ›› 2023, Vol. 13 ›› Issue (6): 11-16.doi: 10.11923/j.issn.2095-4050.cjas2022-0072

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Effect of Key Water in Drip Irrigation Under Plastic Film on Quality and Yield of Winter Potato

YIN Yamin1(), KONG Weibo1,2, FAN Chunmei1, PENG Errui1()   

  1. 1 College of Water Conservancy, Yunnan Agricultural University, Kunming 650201, Yunnan, China
    2 China Energy Construction Group Yunnan Electric Power Design Institute Co., Ltd., Kunming 650201, Yunnan, China
  • Received:2022-06-12 Revised:2022-08-15 Online:2023-06-20 Published:2023-06-15

Abstract:

The growth period of winter potato in Yunnan is in dry season, and the crop water demand is difficult to be fully guaranteed. Crop water demand can be supplemented by irrigation, but the impact of irrigation time and irrigation volume on crop growth and development is not clear. By using drip irrigation under film, different irrigation treatments were carried out at full seedling stage, flowering stage and starch accumulation stage of winter potato to find the optimum irrigation time and volume. The results showed that when the irrigation was carried out twice at full seedling stage and flowering stage and the irrigation amount was 72 m3/hm2 each time, the winter potato yield was the highest (58790 kg/hm2), the commercial potato rate was the best (95.6%), and the economic benefit was the optimal (84059.71 kg/hm2). The experiment verified that the critical irrigation period of winter potato in Yunnan is full seedling stage and flowering stage, and the irrigation amount of 72 m3/hm2 each time is the best irrigation amount of key water for winter potato cultivation.

Key words: winter potato, drip irrigation under film, critical irrigation amount, critical irrigation period