Productivity and quality of whole crop rice varieties in relation to plant components

• Published in: Grassland science 2020-01, Vol.66 (1), p.40-47
• Main Authors: Kim, Jong Geun, Park, Byung‐Chul, Liu, Chang, Zhao, Guo Qiang, Kim, Hak Jin, Ahn, Eok Keun
• Format: Article
• Language: English
• Subjects: Carotene; Cereal crops; Crop science; Crops; Digestibility; Dry matter; Functional materials; Grain; Leaves; Livestock; maturity; Nutrients; nutritive value; Oryza sativa; Productivity; Rice; Stems; Tocopherol; whole crop rice; yield; β-Carotene
• ISSN: 1744-6961; 1744-697X
• DOI: 10.1111/grs.12255

To expand the use of whole crop rice (WCR), accurate information on the nutritional value of newly developed varieties is required. We cultivated three new WCR varieties (Oryza sativa cv. Suweon 605, Yeongwoo and Mogwoo) developed by the National Institute of Crop Science in the southern Korean Peninsula and evaluated their feed value (crude protein, CP; acid detergent fiber, ADF; neutral detergent fiber, NDF; in vitro dry matter digestibility, IVDMD; total digestible nutrients, TDN; and relative feed value, RFV) and functional materials (β‐carotene and α‐tocopherol). Oryza sativa cv. Suweon 605 showed the earliest heading date and Yeongwoo the highest dry matter (DM) yield; however, there were no significant differences among varieties (p > 0.05) in DM yield. The CP content was highest in Mogwoo, and higher in leaves and grains than in stems. Oryza sativa cv. Suweon 605 had the lowest ADF and NDF contents but the highest TDN and RFV. The grain nutrient value changed drastically in all varieties by 10 days after heading. The grain ratio was highest in Oryza sativa cv. Suweon 605 at 65.6% and lowest in Mogwoo at 12.3%. The leaf β‐carotene content was 7–15 times higher than that in stems and grains, and this increase was higher in Yeongwoo (66.25 mg/kg) than those of all other measured objectives in this experiment (p