Abstract:

On the basis of conventional fertilization, organic slow-release fertilizer was applied to test the effects of equal nitrogen input, nitrogen reduction and application time reduction on late rice production in Wucheng District. The results showed that compared with conventional treatments, the yield of late rice was significantly increased under equal nitrogen input treatment, slightly increased under nitrogen reduction by 20%, slightly decreased under equal nitrogen without topdressing and significantly decreased under nitrogen reduction by 40%. Organic slow-release fertilizer is an excellent slow-release fertilizer. For rice cultivation in Wucheng District, organic slow-release fertilizer can be used instead of general balanced compound fertilizer. The application method is one base fertilizer and one topdressing, which can save the time and labor compared with conventional fertilization, and can also appropriately reduce the fertilizer input to achieve the goal of reducing quantity and increasing efficiency simultaneously. In addition, organic slow-release fertilizer can also be applied as one-time base fertilization, however, fertilization reduction was not recommended. Meanwhile, more attention should be paid to the growth of rice, if a phenomenon of shortage of fertilizer supply occurred in the later growth stage, fertilization should be applied timely.

Key words: Wucheng District, late rice, organic slow-release fertilizer, yield