A nitrogen fertilizer application method based on the nitrogen absorption characteristic of cultured small race ginger [Zingiber officinale]
2007
Takano, Y.(Chiba-ken. Agriculture Research Center (Japan)) | Fukuda, H. | Suzuki, K. | Saito, K.
In this study, the nitrogen absorption characteristic of cultured small race ginger plants was investigated, and the most appropriate approach of nitrogen fertilizer application was determined based on the results. Judging from the nitrogen absorption pattern of the race ginger, it was concluded that using a slow-acting fertilizer as the basal fertilizer and a quick-acting fertilizer as the additional fertilizer was a suitable approach. Further, based on the nitrogen absorption characteristic of the plant, it was concluded that amount of the nitrogen fertilizer necessary to obtain the target yield levels ranged from 13 to 16 kg/10a. We concluded that in this study, the amount of the basal fertilizer ranged from 3 to 6 kg/10a and that of the additional fertilizer was 10 kg/10a. On the other hand, when the row fertilization method was employed, wherein the basal fertilizer was used as the coating fertilizer and the additional fertilizer was not used, the amount of nitrogen fertilizer applied decreased to 11 kg/10a; this was lower than the necessary amount (13-16 kg/10a). However, the target yield levels of the ginger crop were obtained. Moreover, there were lower amounts of the nitrate-nitrogen in the deeper soil layers following the harvest as compared to that when the additional fertilizer was applied. Therefore, it was concluded that this method was effective for nitrogen fertilizer application with regard to environmental conservation.
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