収穫時期の異なる年2回収穫栽培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¹  松岡 誠²  石川 葉子³  樽本 祐助²  服部 太一朗²  丸山 篤志³  田中 穣²  境垣内 岳雄²  寺内 方克³ 

[1] 国際農林水産業研究センター;農研機構九州沖縄農業研究センター;農研機構中央農業総合研究センター

关键词: Dry matter yield;    乾物収量;    Forage sugarcane;    飼料用サトウキビ;    Harvest time;    収穫時期;    KRFo93-1;    Two harvests per year;    å¹´2回収穫;    Yield prediction;    収量予測;   

DOI  :  10.1626/jcs.84.41

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In this paper, the optimal harvest time for two harvests per year in forage sugarcane variety, KRFo93-1, was studied. The growth stability and yield productivity were examined in plots harvested in July-May, August-May, September-May and October-May. This experiment was conducted until the 5th ratoon crop for three years. Although there was no significant difference in annual dry matter yield among the four plots, the highest annual dry matter yield of the three-year average was 3.89 kg m-2 both in the August-May and September-May plots. In the 2nd crop of the October-May plot, weeds grew vigorously because the canopy of forage sugarcane was not closed. On the other hand, in the July-May and August-May plots, forage sugarcane controlled weeds because the canopy was closed before the onset of winter. As mentioned above, it is concluded that the August-May plot is the optimal harvest time. The relationship between the growing degree days (GDD, base temperature 14.3°C ) and dry matter yield were also studied to predict the yield. The dry matter yield was expressed by the following regression curve, Y=6.21 ï¼»0.0154exp(−0.00113 X)ï¼½ and R2 was 0.892. This regression curve is expected to help in deciding the harvest time of forage sugarcane.

【 授权许可】

Unknown