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2018 Vol.63, Issue 4 Preview Page

Original Research Article

Feed Value and Yield Potential of Main Whole-Crop Silage Rice Cultivars with Harvesting Time in the Central Plains of Korea

중부 평야지에서 사료용 벼 주요품종의 수확시기 별 사료가치 및 수량성

Eok-Keun Ahn1*
,
Yong-Jae Won2
,
Hyang-Mi Park2
,
Kuk-Hyun Jung1
,
Ung-Jo Hyun1
안 억근1*
,
원 용재2
,
박 향미2
,
정 국현1
,
현 웅조1
1Scientist, Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration
2Senior Scientist, Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration
1농촌진흥청 국립식량과학원 중부작물부 중부작물과 농업연구사
2농촌진흥청 국립식량과학원 중부작물부 중부작물과 농업연구관
*Corresponding Author
31 December 2018. pp. 294-303
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Abstract

To set an optimal harvest time for five main whole-crop silage (WCS) rice cultivars, Nokyang (Ny), Mogwoo (Mw), Mogyang (My), Nokwoo (Nw) and Yeongwoo(Yw), based on feed value and dry matter yield, we analyzed water content (WC), feed values such as percent crude protein (CP), crude fat (CF), crude ash (CA), neutral detergent fiber (NDF), acid detergent fiber (ADF), estimated total digestible nutrients (TDN), and calculated their dry matter yield (DMY). These parameters were estimated at the booting stage and every 10 days from start of heading to 45 days after heading (DAH) to identify the optimal harvest time for these rice varieties. In all varieties, except Ny, the WC was about 65% on the 30th DAH. In terms of WC, it is judged that there would be no major problem in preparing high quality silage when harvested between 20∼30 DAH for Ny and about 30 days for the other cultivars. The CP and CA decreased significantly as the harvest time was delayed in all varieties (p<0.05). However, the CF in the tested varieties generally declined as DAH increased, and then increased again(p<0.05). The decrease in ADF and NDF was significantly different from the booting stage to 45 DAH in all varieties (p<0.05) and the estimated TDN increased gradually in all varieties as the harvest time was delayed. The TDN of all varieties, except Nw, was over 70% around 30 DAH. As harvest time was delayed, the DMY for all WCS rice increased significantly (p<0.05). The maximum DMY for each cultivar was observed at 45 DAH, however, no significant difference (p<0.05) was seen after 40 DAH for Ny and Yw, 30 DAH for Mw and Nw, and 20 DAH for My. Considering these results and others factors such as lodging, shattering, digestibility of grains, conversion of eating rice, etc., the optimal harvest time for silage use of all WCS rice tested was generally the yellow ripening stage, at about 30 DAH (30~40 DAH for Ny and Mw, and 30 DAH for My, Nw and Yw)

Keywords
feed value
harvest time
water content
whole-crop silage rice
yield
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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 : 63
  • No :4
  • Pages :294-303
  • Received Date : 2018-10-08
  • Revised Date : 2018-11-08
  • Accepted Date : 2018-11-28
  • DOI :https://doi.org/10.7740/kjcs.2018.63.4.294
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