Research paper
Effects of Late-Stage Nitrogen Fertilization and Heading-Stage Nitrogen Top-Dressing on Yield and Barley-Tea Processing Suitability of Barley Varieties 'Kashimamugi' and 'Kashimagoal' in Converted Paddy Fields
Study tested nitrogen fertilization timing in two barley varieties grown in converted paddy fields for barley-tea production. Nitrogen application at heading stage increased grain protein content and significantly improved tea processing suitability and grain weight.
水田転換畑における生育後期重点窒素施肥と穂ぞろい期窒素追肥が麦茶用オオムギ品種「カシマムギ」と「カシマゴール」の収量および麦茶加工適性に及ぼす影響
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About this paper
Key findings
- Heading-stage nitrogen top-dressing increased grain protein content and improved barley-tea processing suitability significantly
- Higher grain protein content correlated with darker coloration (lower L* value) in barley-tea granules and powder
- Heading-stage nitrogen application increased 1000-grain weight, supporting stable raw material supply
- Late-stage nitrogen emphasis showed minimal effect on tea processing suitability and sometimes promoted late-heading problems
Method: Field cultivation trial with nitrogen fertilization timing as treatment factor; yield, grain quality, and tea processing properties measured
Sample: 2 barley cultivars
Journal: CiNii (Japanese tea breeding database)
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