Effects of organic fertilizer application on silage quality of forage sorghum

Abstract: A field experiment was designed to determine the effect of organic fertilizer application on silage quality of forage sorghum （Sorghum bicolor）. The results showed that under the same nitrogen application amount, as organic fertilizer addition increasing, the fermentation quality of silage decreased after initial increase, the best fermentation quality was obtained at the organic fertilizer rates of 75 t/ha and 150 t/ha. Meanwhile, the contents of acid detergent fiber and neutral detergent fiber increased，while the content of crude protein and in vitro dry matter digestibility decreased with increasing organic fertilizer addition. In order to obtain both good fermentation quality and feeding value of silage, application of 75-150 t/ha organic fertilizer as the base fertilizer is suitable in forage sorghum growing for silage.