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Effects of Alternative Crops Cultivation on Soil Physico-chemical Characteristics and Crop Yield in Paddy Fields

논에서 벼 대체작물 재배가 토양 물리화학성과 작물 수량에 미치는 효과

  • Han, Kyunghwa (Soil and Fertilizer Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Cho, Hyunjun (Soil and Fertilizer Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Cho, Heerae (Soil and Fertilizer Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Lee, Hyubsung (Soil and Fertilizer Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Ok, Junghun (Soil and Fertilizer Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Seo, Mijin (Soil and Fertilizer Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Jung, Kangho (Soil and Fertilizer Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Zhang, Yongseon (Soil and Fertilizer Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Seo, Youngho (Agricultural Environment Research Division, Bureau of Research and Development, Gangwon Agricultural Research & Extension Services)
  • 한경화 (농촌진흥청 국립농업과학원 농업환경부 토양비료관리과) ;
  • 조현준 (농촌진흥청 국립농업과학원 농업환경부 토양비료관리과) ;
  • 조희래 (농촌진흥청 국립농업과학원 농업환경부 토양비료관리과) ;
  • 이협성 (농촌진흥청 국립농업과학원 농업환경부 토양비료관리과) ;
  • 옥정훈 (농촌진흥청 국립농업과학원 농업환경부 토양비료관리과) ;
  • 서미진 (농촌진흥청 국립농업과학원 농업환경부 토양비료관리과) ;
  • 정강호 (농촌진흥청 국립농업과학원 농업환경부 토양비료관리과) ;
  • 장용선 (농촌진흥청 국립농업과학원 농업환경부 토양비료관리과) ;
  • 서영호 (강원도농업기술원 연구개발국 환경농업연구과)
  • Received : 2017.04.25
  • Accepted : 2017.05.15
  • Published : 2017.06.30

Abstract

BACKGROUND:Cultivation of alternative crops in paddy fields is necessary because of the decrease in rice consumption and the increase in excess stock of rice. The study was conducted to investigate the effects of alternative crops cultivation in paddy fields on soil physico-chemical characteristics and crop yield. METHODS AND RESULTS: Soybean (Glycine max), red-clover (Trifolium pratense), and water convolvulus (Ipomoea aquatica) were selected for alternative crops in the first and/or second year and rice was planted in the third year. When alternative crops were cultivated in the previous year, soil bulk density, soil hardness, and water content were lower than those for rice cultivation. Water-depth decreasing rate and aggregate content were greater for the upland-upland-paddy cropping system than upland-paddy-paddy cropping system. Cultivation of red-clover and water convolvulus for two years resulted in the high soil organic matter content. In the third year, available phosphate, exchangeable potassium, and soil cation exchange capacity were relatively high when soybean was cultivated in the previous year. In the first year, water convolvulus cultivation showed greater productivity than red-clover cultivation while the opposite pattern was found in the second year. Rice yield in the third year was greater for soybean or red-clover as a previous crop than for water convolvulus as a previous crop. CONCLUSION: The results suggest that cultivation of alternative crops in paddy fields can improve soil physical properties including bulk density, hardness, water content, and aggregate content as well as rice productivity.

Keywords

Paddy field;Red-clover;Soil property;Soybean;Water convolvulus

Acknowledgement

Supported by : National Institute of Agricultural Sciences

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