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2022 Vol.67, Issue 1

Original Research Article

Feed Value of the Different Plant Parts of Main Forage Rice Varieties

사료용 벼 주요 품종의 수확부위 별 사료가치

Eok-Keun Ahn1*
,
Yong-Jae Won2
,
Kyung-Ho Kang2
,
Hyang-Mi Park2
,
Kuk-Hyun Jung1
,
Ung-Jo Hyun1
,
Yoon-Sung Lee1
안 억근1*
,
원 용재2
,
강 경호2
,
박 향미2
,
정 국현1
,
현 웅조1
,
이 윤승1
1Scientist, Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration, Suwon 16429, Korea
2Senior Scientist, Central Area Crop Breeding Division, Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration, Suwon 16429, Korea
1농촌진흥청 국립식량과학원 중부작물부 중부작물과 농업연구사
2농촌진흥청 국립식량과학원 중부작물부 중부작물과 농업연구관
*Corresponding Author
1 March 2022. pp. 1-8
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Abstract

In order to manufacture feed suitable for consumer use and provide feed value information, we analyzed the feed components of the four main forage rice varieties by plant parts harvested 30 days after heading. The contents of the six feed ingredients were significantly different (p<0.05) among harvested parts. In the panicle, the crude protein (CP) (6.97%) and lignin (3.11%) were the highest, while the crude ash (CA) and neutral detergent fiber (NDF) contents were significantly lower, resulting in a total digestible nutrient (TDN) content of 77.29%, which is higher than that of the stem (64.82%) and leaf blade and sheath (LBS) (63.57%) (p<0.05). In contrast, the content of crude fat (CF) did not differ significantly among parts (p<0.05). In panicles from ‘Jonong’, ‘Nokyang’ and ‘Yeongwoo’, the TDN content of each cultivar was 78.48-79.07%, with no significant difference among the varieties. In ‘Mogwoo’ (Mw), the CP content was 8.70%, which was much higher than that of other varieties (p<0.05). In particular, the Mw TDN content was slightly lower in the panicle (72.95%) but higher in the stem (75.37%) and LBS (66.49%) than in the other varieties. The CA, NDF, acid detergent fiber (ADF), and lignin contents were also very low compared to other varieties; therefore, the feed value of the stem and LBS was excellent. In addition, the total dry matter weight (DMW) was 123 g per hill, which was much higher than 82-105 g per hill for other varieties. The distribution of DMW by part was LBS (56.9 g), stem (36.8 g), and panicle (29.3 g), and because the parts, except the panicles, were much higher than the 43-57% of other varieties (grain straw ratio: 76%), rice straw is advantageous in terms of quantity and feed value when used as forage on farms. The relative feed value (RFV) of the four cultivars ranged from 86.79-403.74 across all parts, and hay of grade 3 or higher with an RFV of 100 or more increased with delayed heading in both stems and LBS. This is due to the accumulation of starch into grains during ripening, which supports the observation that the RFV of the early flowering ‘Jonong’ and ‘Nokyang’ panicles increased.

Keywords
feed value
forage
plant part
rice
straw
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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 : 67
  • No :1
  • Pages :1-8
  • Received Date : 2021-11-22
  • Revised Date : 2022-01-20
  • Accepted Date : 2022-01-20
  • DOI :https://doi.org/10.7740/kjcs.2022.67.1.001
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