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2024 Vol.69, Issue 2 Preview Page

Original Research Article

Efects of Biodegradable Mulching Films Containing Rice Powder on Sweetpotato Growth

쌀 분말이 함유된 생분해성 멀칭필름이 고구마 생육에 미치는 영향

Sin Young Park1
,
Ju Hyun Im1
,
Eun Byul Go1
,
Kil Ja Kim2
,
Jae Min Park3
,
Dong Kwan Kim2*
박 신영1
,
임 주현1
,
고 은별1
,
김 길자2
,
박 재민3
,
김 동관2*
1Research Scientist, Crop Research Division, Jeonnam Agricultural Research & Extension Services, Naju 58213, Korea
2Senior Research Scientist, Crop Research Division, Jeonnam Agricultural Research & Extension Services, Naju 58213, Korea
3CEO, Dawin Group Corporation, Pyeongtaek 17710, Korea
1전라남도농업기술원 식량작물연구소 농업연구사
2전라남도농업기술원 식량작물연구소 농업연구관
3다윈그룹(주) 대표이사
*Corresponding Author
1 June 2024. pp. 123-132
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Abstract

In this study, two types of biodegradable film prototypes were produced using plastic resin containing rice powder. The application of these biodegradable films in sweetpotato (Ipomoea batatas L. Lam) fields and their impacts of plant growth, yield, and the soil environment were assessed, in comparison with Polyethylene (PE) film. The light transmittance of the biodegradable film containing 30% of 350 mesh rice powder (BF30-350RP) was 0.8%, which was lower than the 2.0% light transmittance of the biodegradable film containing 40% of 500 mesh rice powder (BF40-500RP) and 2.7% light transmittance of PE film. Surface temperature measurements on clear day indicated that the PE film exhibited the lowest temperature, with the minimal difference observed between BF40-500RP and BF30-350RP. Assessment of the damage ratio resulting from agricultural work revealed a ranking of 0.4% for the PE film, 3.3% for BF500-400RP, and 5.3% for BF350-30RP. Visible decomposition of BF40-500RP and BF30-350RP commenced after 40 and 30 days of outdoor exposure, reaching 62.3% and 70.4% decomposition at 90 days post-exposure, respectively. The decomposition of biodegradable films applied to sweetpotato fields progressed more slowly in BF40-500RP than in BF30-350RP. The BF40-500RP film on the surface of the ridges was decomposed by 5%, 30%, 55%, and 90% after 30, 60, 90, and 120 days after planting sweetpotato cuttings, respectively. Both types of biodegradable films at the ridge and furrow borders were completely decomposed after 75 days of sweetpotato planting. In a field where the surface was sealed by mulching without growing sweetpotatoes, the soil moisture and its deviation were lower in the order of PE film, BF40-500RP, and BF30-350RP, but the differences were not significant. The soil temperature was higher for PE film mulching than for the biodegradable films containing rice powder, but the differences were small. Two months after sweetpotato planting, the daily average soil moisture decreased by 2.5%point for BF30-350RP mulching, 1.5%point for BF40-500RP mulching, and 1.1%point for PE film mulching over seven days. Soil temperature was similar for both biodegradable film mulches, but increased steadily for the PE film mulch, reaching a daily average of 0.1°C higher than for the biodegradable films. Sweetpotato vine growth and tuber yield were similar for all the mulching films tested.

Keywords
biodegradable
decomposition
film
mulch
rice
soil temperature and moisture
sweetpotato
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 69
  • No :2
  • Pages :123-132
  • Received Date : 2024-04-01
  • Revised Date : 2024-04-26
  • Accepted Date : 2024-04-29
  • DOI :https://doi.org/10.7740/kjcs.2024.69.2.123
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