KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Comparative Analysis on the Biomass Production between Machine-Transplanted and Water-Broadcast Seeded Silage Rice in the Central Plain Area of Korea

중부 평야지에서 사료용 벼 기계이앙과 담수산파 재배의 건물 생산성 비교 분석

  • Yang, Woonho (Crop Cultivation and Environment Research Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Park, Jeong-Hwa (Crop Cultivation and Environment Research Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Kang, Shingu (Crop Cultivation and Environment Research Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Sukjin (Crop Cultivation and Environment Research Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Choi, Jong-Seo (Crop Cultivation and Environment Research Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration)
  • 양운호 (농촌진흥청 국립식량과학원 중부작물부 재배환경과) ;
  • 박정화 (농촌진흥청 국립식량과학원 중부작물부 재배환경과) ;
  • 강신구 (농촌진흥청 국립식량과학원 중부작물부 재배환경과) ;
  • 김숙진 (농촌진흥청 국립식량과학원 중부작물부 재배환경과) ;
  • 최종서 (농촌진흥청 국립식량과학원 중부작물부 재배환경과)
  • Received : 2018.03.21
  • Accepted : 2018.08.02
  • Published : 2018.09.30
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Abstract

A field study was conducted over a 3-year period from 2014 to 2016 in the central plain area, Suwon, Korea, 1) to compare the biomass production between machine-transplanted and water-broadcast seeded silage rice and 2) to elucidate the growth factors that affect the difference in biomass production between the two cultivation practices. The heading date for the water-broadcast seeded silage rice was September 11-18, which was delayed by 11-17 days when compared to that for the machine-transplanted silage rice. On average, water-broadcast seeded silage rice had a shorter plant height, more panicles per area, and a greater biomass production because of the increased straw dry weight. However, the difference in dry weight of each plant organ between the two cultivation practices exhibited yearly variation. When the data were pooled across experimental years, cultivation practices, and varieties, biomass production was highly positively correlated with straw dry weight but not with panicle dry weight. When the ratio of water-broadcast seeding to machine-transplanting was analyzed, total dry weight and straw dry weight were positively associated with each other, whereas no relationship was found between total dry weight and panicle dry weight. Despite that water-broadcast seeded silage rice produced more panicles per area than machine-transplanted silage rice, the two cultivation practices had a similar dry weight per culm. Therefore, we conclude that the silage rice from the water-broadcast seeding, compared to the machine-transplanting, produced more biomass because of the combination of the increased panicle number per area and a similar dry weight per culm. These results suggest that silage rice could be produced through water-broadcast seeding to increase biomass production with low labor and cost input.

중부 평야지에서 사료용 벼 기계이앙과 담수산파 재배의 건물 생산 특성을 비교 분석하기 위하여 국립식량과학원 중부작물부 수원 벼 재배 시험 포장에서 최근 육성 등록된 목우와 녹우 품종을 이용하여 5월 20일에 이앙 및 직파하여 3년간 검토한 연구 결과는 다음과 같다. 1. 담수산파 재배의 $m^2$당 입모수는 125~192개였으며, 출수기는 9월 11일~18일로 기계이앙보다 11~17일 지연되었다. 2. 기계이앙보다 담수산파 재배에서 수확기의 3년 평균 볏짚 건물중은 증가하였고 이삭 건물중은 감소하였는데, 볏짚 건물중 증가량이 이삭 건물중 감소량의 3.3배로 많아 전체 건물 수량은 증대되었다. 3. 건물 수량은 볏짚 건물중과 밀접한 정의 상관 관계를 보였고 이삭 건물중과는 일정한 관계가 없었으며, 출수 후 수확기까지의 볏짚 건물중 감소 정도와 이삭 건물중 증가 정도는 유의한 관계가 인정되지 않았다. 4. 건물 수량과 밀접하게 관련된 볏짚 건물중은 초장과는 상관을 보이지 않았던 반면 $m^2$당 수수가 많아짐에 따라 유의하게 증가하였으며, 기계이앙 대비 담수산파의 전체 건물중 비율은 이삭 건물중 비율과는 관계가 없었고 볏짚 건물중 비율과는 정의 상관을 보였다. 5. 기계이앙 대비 담수산파에서 $m^2$당 수수는 9% 증가하여 하나의 이삭이 차지하는 평균 면적이 감소하였음에도 이삭줄기당 건물중 비율이 비슷하게 유지되었다. 6. 따라서 담수산파 재배를 통하여 생산성을 높이는 동시에 노동력과 생산비를 절감할 수 있는 것으로 평가되며, 담수산파에서 이삭 생산량을 높이기 위한 품종 재배적 보완 연구가 필요할 것으로 생각된다.

Keywords

References

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