Improvement of phosphate fertilization method in wetland rice

Abstract

The research aimed to assess better P fertilization method for wetland rice which used quickly dissolve P fertilizer given in split application. The research concluded that the application of quickly dissolve P fertilizer to Alfisol and Oxisol which was applied in split application by twice (0 and 30 days after planting) and three times (0, 15 and 30 days after planting) increased the eficiency of P fertilization in wetland rice. The split application of 75 kg ha-1 (50 per cent of recommended dose) in Alfisol yielded dry seed as high as 6,374 kg ha-1 (at the twice application), 6,280 kg ha-1 (the three times application), while the control treatment yielded as high as 6,027 kg ha- 1. In Oxisol the yield of rice was 8,200 kg ha-1 for the control treatment, 8,027 kg ha-1 for the twice application and 8,440 kg ha-1 for the three time applications.