カリ施肥量の違いが多回株出しで栽培した飼料用サトウキビの生育および 養分吸収に及ぼす影響

日本作物学会紀事

寺島 義文²  安藤 象太郎²  松岡 誠¹  石川 葉子³  原田 直人⁴  樽本 祐助¹  服部 太一朗¹  田中 穣¹  境垣内 岳雄¹  寺内 方克³ 

[1] 農研機構九州沖縄農業研究センター;国際農林水産業研究センター,;農研機構中央農業総合研究センター;鹿児島県農業開発総合センター 畜産試験場

关键词: Forage sugarcane;    飼料用サトウキビ;    Growth;    生育;    K2O fertilizer application level;    カリ施肥量;    Multi-ratooning cultivation;    多回株出し栽培;    Nutrient uptake;    養分吸収;   

DOI  :  10.1626/jcs.83.305

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 nutrient uptake of forage sugarcane plants were examined under multi-ratooning cultivation using various K2O application levels to develop a management system considering the mineral balance in the plant. Compared with the usual management (control), the plant in the plots with reduced K2O application levels had a lower K/(Ca+Mg) ratio (index of mineral balance) and a significant difference was observed from the 2nd ratoon. This was because the K concentration decreased and the Ca and Mg concentrations increased due to reduction of K2O application level. Therefore, the K/(Ca+Mg) ratio can be improved by continuous K2O fertilizer reduction. On the other hand, soil exchangeable K contents were lowered by reduced K2O application and the yield was decreased significantly in multi-ratooning cultivation. Therefore, continuous K2O fertilizer reduction management is not recommended and the usual amount of K2O fertilizer should be maintained. Since the soil exchangeable K contents decreased even in the control plot, additional K2O fertilizer such as manure should be applied in order to maintain the yield level in multi-ratooning crops. The usual amount of N application was considered appropriate and that of P2O5 application superfluous. Since the soil exchangeable Ca and Mg contents were reduced in multi-ratooning crops, Ca and Mg application to the soil should be conducted using lime.

【 授权许可】

Unknown