Abstract:

In order to screen out the fertilizer management methods suitable for late rice production, reduce fertilizer cost and increase economic benefits, the effects of different slow-release fertilizer application rates and management methods on yield, agronomic traits and nitrogen efficiency were studied by using indica-japonica hybrid late rice Yongyou 7850. The results showed that under the same nutrient treatment, organic and inorganic slow-release fertilizer was beneficial to increase the effective panicle and grain number per panicle, and the yield of 667 m² basal fertilizer with 30 kg and appropriate tillering fertilizer was 4.80% higher than that of conventional fertilization, and the agronomic efficiency of nitrogen fertilizer was the highest. Under the same cost, the yield of slow-release fertilizer was still 1.53% higher than that of conventional fertilization, and the agronomic efficiency of nitrogen fertilizer was significantly higher than that of conventional fertilization. The organic and inorganic slow-release fertilizer of double-cropping late rice should be 667 m² basal fertilizer with 30 kg and total nitrogen at 10.7-12.0 kg.

Key words: Yongyou 7850, slow-release fertilizer, agronomic traits, agronomic efficiency of nitrogen fertilizer, yield