ソルガム (Sorghum bicolor Moench) 品種「SIL-05」の硝酸態窒素および養分蓄積特性  [in Japanese] Characteristics of Nitrate and Nutrients Accumulation of a Sorghum (Sorghum bicolor Moench.) Variety, 'SIL-05'  [in Japanese]

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Abstract

窒素多量施用条件で栽培した,ソルゴー型ソルガム品種「SIL-05」の硝酸態窒素濃度は,ソルゴー型ソルガムとして平均的な硝酸態窒素濃度を示すことから比較対照とした「FS501」,「SG-1A」,「Sugar Graze」に比べて60〜70%低く,反芻家畜の硝酸塩中毒のためのガイドラインである乾物あたり0.2%を超えにくいことが明らかとなった。また,「SIL-05」は硝酸態窒素濃度だけでなく,窒素, K, Ca, Mg濃度が30〜40%程度低く,これは茎部の養分濃度が低いことに起因していた。乾物生産量は「SIL-05」と対照品種に有意な違いは認められなかった。那須塩原市では,「SIL-05」は徒長気味となり倒伏が見られたため,今後は適地での栽培特性を検討する必要がある。本研究の結果は,農業現場における「SIL-05」の選択による硝酸態窒素濃度低減技術の可能性を示した。

Characteristics of nitrate-N and nutrients accumulation of sorgo type sorghum varieties including 'SIL-05', a new genotype developed for high sugar accumulation, was evaluated. The varieties of 'SIL-05', 'FS501', 'SG-1A' and 'Sugar Graze' were cultivated in fields of NARO Institute of Livestock and Grassland Science located in Nasushiobara under a heavy N application rate of 55 kgN/10 a in 2009 and 2010. Nitrate-N concentrations of 'SIL-05' on dry matter (DM) basis were turned out to be lower by about 60-70% than those of the other three varieties in nitrate-N accumulation and those of 'SIL-05' were below 0.2% which is a guideline level for avoiding nitrate poisoning for ruminants in Japan. Further, N, K, Ca and Mg concentrations of 'SIL-05' were also lower by about 30-40% than the other varieties. The lower nutrients concentration comes from lower concentrations in stem. As for DM production, no significant differences were observed between the 4 varieties tested. During the maturing period, 'SIL-05' was inclined to show higher DM production and nitrogen assimilation rates than 'FS501' and this might be involved with lower nitrate concentration of 'SIL-05'. In conclusion, 'SW-05' is a useful variety to decrease nitrate-N concentrations under higher N fertility conditions.

Journal

  • Journal of Japanese Society of Grassland Science

    Journal of Japanese Society of Grassland Science 59(1), 21-28, 2013-04-15

    Japanese Society of Grassland Science

References:  34

Codes

  • NII Article ID (NAID)
    110009597467
  • NII NACSIS-CAT ID (NCID)
    AN00194108
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    04475933
  • NDL Article ID
    024704404
  • NDL Call No.
    Z18-344
  • Data Source
    CJP  NDL  NII-ELS  IR 
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