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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (12): 69-74.doi: 10.11924/j.issn.1000-6850.casb2022-0398

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Effects of Whole Biodegradable Film on Soil Temperature, Soil Moisture, and Sweet Potato Yield in Field

ZHANG Junli1(), SUO Long1, WANG Rui2, LIANG Jianhong3, DONG Xiaomei1, JIAO Xueli1, ZHANG Xiaofei1, LIU Hui1, HE Wei1   

  1. 1 Weinan City Agricultural Technology Promotion Center, Weinan, Shaanxi 714000
    2 Heyang County Agricultural Technology Promotion Center, Heyang, Shaanxi 715300
    3 Weinan Seed Administration Station, Weinan, Shaanxi 714000
  • Received:2022-05-18 Revised:2022-06-29 Online:2023-04-25 Published:2023-04-21

Abstract:

In order to study the effects of whole biodegradable film on soil temperature and soil moisture in sweet potato field and sweet potato yield, a field positioning experiment was set up to analyze the effects of bare land (M0), polyethylene mulching film (M1) and whole biodegradable film (M2) on soil moisture, soil temperature, sweet potato yield and economic benefit. The results showed that, film mulching (M1 and M2) could increase soil moisture and temperature, but the effects of soil moisture retention and temperature increase gradually decreased after the stem and leaf vigorous growing period, which were still higher than those of bare soil (M0). At the same time, the whole biodegradable film (M2) could effectively improve the yield of commodity sweet potato, and the average income was the highest, 53649.6 yuan/hm2 higher than that of bare land treatment, 4480.8 yuan/hm2 higher than that of polyethylene film treatment. To sum up, whole biodegradable film could replace polyethylene mulching film in sweet potato planting and could be popularized in production.

Key words: whole biodegradable film, sweet potato, yield, soil moisture, soil temperature