Abstract:

Under the premise of reducing the amount of chemical fertilizer, the application effect of microbial compound fertilizer on rice was investigated with conventional fertilization as the control. The results showed that under the premise of reducing the total nutrients of chemical fertilizer by 20.0%, the application of microbial compound fertilizer had no effect on the growth and yield of rice. Under the premise that the total nutrients of chemical fertilizer were reduced by 30.0%, although there was a certain impact on the growth of rice plants, the impact on yield was small. Compared with conventional fertilization, the amount of chemical fertilizer nutrient input per unit yield of late rice with microbial compound fertilizer was lower, and the effect of chemical fertilizer reduction was obvious, and the effect of phosphorus reduction was the best. In addition, the application of microbial compound fertilizer can improve soil pH value, increase the activity of soil urease, protease and phosphatase, increase soil available nutrient content, and reduce the number of soil fungi. This study concluded that though the cost of rice fertilization increased after the application of microbial compound fertilizer, it could effectively improve soil quality and fertilizer utilization efficiency, and it was suggested that it should be popularized and applied as an effective measure to reduce the amount of rice fertilizer.

Key words: microbial compound fertilizer, rice, chemical fertilizer reduction, soil fertility