株出しでの年2回収穫体系における飼料用サトウキビ品種KRFo93-1の 生育および収量

日本作物学会紀事

服部 育男²  寺島 義文²  松岡 誠²  杉本 明¹  服部 太一朗²  鈴木 知之²  境垣内 岳雄²  寺内 方克² 

[1] 国際農林水産業研究センター;九州沖縄農業研究センター

关键词: Cumulative effective temperature;    有効積算温度;    Forage sugarcane;    飼料用サトウキビ;    KRFo93–1;    Stem elongation;    茎伸長;    Twice harvesting system;    å¹´2回収穫体系;    Yield;    収量;   

DOI  :  10.1626/jcs.79.414

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The growth and yield in the twice harvesting system (THS) were compared with those in once harvesting system (OHS) of two sugarcane varieties (KRFo93–1 bred for forage use and the leading commercial NiF8 for sugar production). The cumulative effective temperature was the highest in OHS, followed by the 1st crop in THS and the 2nd crop in THS in this order. The growth stage was younger as the cumulative effective temperature was lower in both varieties. The stem length was consistently longer in KRFo93–1 than in NiF8, and the differences in stem length between the two varieties was markedly significant in the initial growth period after ratooning and in the 2nd crops in THS including low temperature period. Fresh- and dry-matter yields averaged in the 1st and 2nd ratoon years in KRFo93–1 were 226 t/ha/yr and 56.1 t/ha/yr in OHS, respectively and 278 t/ha/yr and 57.7 t/ha/yr in THS. Dry matter productivity was higher in THS than in OHS in KRFo93–1 but was lower in THS than in OHS in NiF8. The mechanism of high yielding ability of KRFo93-1 in THS may be caused by the vigorous initial growth after ratooning and vigorous stem elongation in the low temperature period.

【 授权许可】

Unknown