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Double Cropping Productivity of Main Whole-Crop Silage Rice and Winter Feed Crops in the Central Plains of Korea

중부 평야지에서 사료용 벼와 주요 동계사료작물 이모작 시 생산성

  • Ahn, Eok-Keun (Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Jeong, Eung-Gi (Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Park, Hyang-Mi (Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Jung, Kuk-Hyun (Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Hyun, Ung-Jo (Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Ku, Ja-Hwan (Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration)
  • 안억근 (농촌진흥청 국립식량과학원 중부작물부 중부작물과) ;
  • 정응기 (농촌진흥청 국립식량과학원 중부작물부 중부작물과) ;
  • 박향미 (농촌진흥청 국립식량과학원 중부작물부 중부작물과) ;
  • 정국현 (농촌진흥청 국립식량과학원 중부작물부 중부작물과) ;
  • 현웅조 (농촌진흥청 국립식량과학원 중부작물부 중부작물과) ;
  • 구자환 (농촌진흥청 국립식량과학원 중부작물부 중부작물과)
  • Received : 2019.10.13
  • Accepted : 2019.12.14
  • Published : 2019.12.31

Abstract

In order to establish an optimal double cropping system to obtain the maximum annual quantity, we investigated the annual productivity of whole-crop silage (WCS) rice, Jowoo (Jw), Yeongwoo (Yw), and Mogwoo (Mw), and winter feed crops (WFC), Italian ryegrass (IRG), Greenfarm (GF), rye Gogu (GU), and triticale Joseong (JS), in paddy fields of the central plains of Korea. From 2016 to 2019, each crop was subjected to two standard cultivation methods: WCS rice and WFC optimal. Using the WCS optimal mode, the average dry matter yield (DMY) of WCS rice, early flowering Jw, was 15.8 tons/ha and 21.0 for the mid-late heading Yw; there was no significant difference compared to the 19.2 tons/ha late-flowering Mw (p<0.01). The WFC were not significantly different between GF (3.2 tons/ha) and GU (4.5) sown on September 23rd, while JS was the highest at 12.6 tons/ha (p<0.001). There was a significant difference in the order of JS (16.6 tons/ha) > GF (10.5) > GU (4.7)(p<0.001) sown on October 11th. For JS sown on October 31st, the DMY was 11.8 tons/ha, which was significantly higher than that of the other two crops (p<0.05). Except for rye GU, DMY was the highest when sown on October 11th. For WFC optimal mode, the average DMY of JS was the highest at 18.3 tons/ha, which was significantly different from that of GF (10.9) and GU (9.6) (p<0.001). The DMY of WCS rice transplanted on May 10th was the highest at 23.0 tons/ha in Mw, which was not significantly different from that of Yw (21.4) but significantly different from that of Jw (15.9) (p<0.05). On transplanting on May 25th, the DMY of Mw was the highest at 24.2 tons/ha; this was not significantly different from that of Yw (20.7), but it was significantly different from that of Jw (18.6) (p<0.05). When transplanted on June 11th, the DMY was 21.3 tons/ha in Yw, which was significantly higher than the DMY of other two cultivars, Jw and Mw (p<0.05). For the WCS rice-WFC double cropping, the total annual DMY was 33.6 tons/ha with the combination of the WCS rice, Yw, and the triticale JS for WCS optimal mode. Meanwhile, the total annual DMY was 39.6 tons/ha with the combination of the triticale JS and the WCS rice, Yw, for WFC optimal mode. In conclusion, the strategies for obtaining the maximum yield of high-quality forage for WCS rice-WFC, WFC-WCS rice double cropping are as follows: 1) cultivation centered on the optimal mode of WFC, and 2) sowing the WFC, triticale JS in mid-October, harvesting the crops around the end of May and transplanting the WCS rice, Yw, in early June to obtain the maximum DMY of 39.6 tons/ha.

중부 평야지에서 사료용 벼-동계사료작물, 동계사료작물-사료용 벼 이모작 시 양질 조사료의 최대 수량성 작목 조합을 알아보기 위해 사료용 벼 최적재배 중심으로 재배하였을 때와 동계사료작물 최적 재배 중심으로 재배하였을 때로 나누어 4년 간 시험한 연구결과는 다음과 같다. 1. 사료용 벼 보통기 재배양식 중심으로 재배하였을 때 사료용 벼의 건물수량은 조생종 '조우'가 평균 15.8톤/ha로 가장 적었고 중만생종 '영우'가 21.0톤/ha로 가장 많았으나 19.2톤/ha인 '목우'와 통계적으로 차이가 없었다(p<0.01). 동계사료작물은 9월 23일 파종 시 '그린팜'(3.2톤/ha)과 '곡우'(4.5톤/ha)는 유의적으로 차이가 나지 않았고 '조성'은 12.6톤/ha로 가장 높았으며(p<0.001) 10월 11일 파종 시에는 '조성'(16.6톤/ha)>'그린팜'(10.5)>'곡우'(4.7)순으로 유의적으로 차이가 있었고(p<0.001) 10월 31일 파종한 경우 '조성'이 11.8톤/ha로 다른 두 초종보다 유의적으로 높았다(p<0.05). 호밀 '곡우'를 제외하고는 10월 11일 파종 시 건물수량이 가장 높았다. 2. 동계사료작물 최적 파종시기 중심으로 재배하였을 때 동계사료작물의 평균 건물수량은 트리티케일 '조성'이 '그린팜'(10.9톤/ha)과 '곡우'(9.6)와 비교하여 유의적으로 차이를 보이는 18.3톤/ha로 가장 높았으며 사료용 벼는 5월 10일 이앙 시 건물수량은 '목우'가 23.0톤/ha로 가장 높았으나 '영우'(21.4)와는 유의적인 차이가 없었고(p<0.05) '조우'(15.9)와는 차이가 있었다(p<0.05). 5월 25일 이앙시 '목우'가 24.2톤/ha로 가장 높았으나 '영우'(20.7)와는 차이가 없었고(p<0.05) '조우(18.6)'와 유의적인 차이를 보였다(p<0.05). 6월 11일 이앙 시 건물수량은 '영우'가 21.3톤/ha로 다른 두 품종에 비해 유의적으로 높았다(p<0.05). 3. 중부평야지에서 사료용 벼-동계사료작물 이모작 시 최대 조사료 생산 작목 조합은 사료용 벼 최적 이앙 및 수확 시기에 맞추어 동계사료작물을 연속하여 재배하였을 때는 사료용 벼 '영우'와 트리티케일 '조성' 조합으로 생산성은 33.6톤/ha이었으며 동계사료작물 최적 파종 및 수확 시기에 맞추어 연속하여 사료용 벼를 재배하였을 때는 동계사료작물인 트리티케일 '조성'과 사료용 벼 '영우' 조합으로 생산성은 39.6 (톤/ha)이었다.

Keywords

References

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