Abstract
The effects of pig waste pellet fertilizer on the growth and yield of rice were examined. The pig waste pellet fertilizer was added together with chemical fertilizer. When the rice plant was cultivated by using pig waste pellet fertilizer as basal application and ordinary chemical fertilizer as supplemental application, the growth of rice before the supplemental application of fertilizer decreased a little compared with the standard cultivation. However, the yield and the quality of rice were similar to those under standard cultivation. In case of the pellet fertilizer 84% of the nitrogen originated from pig waste, chemical nitrogen fertilizer was reduced by 50% compared with the standard cultivation. The amount of nitrogen remaining in the soil after harvesting the rice was estimated to be 23 kg ha-1. It was necessary to confirm the accumulation of nitrogen in soil after successive application of the pig waste pellet fertilizer.
