Abstract:

Field experiments were conducted to study the effects of different organic fertilizer substitution modes on the quality and soil properties of citrus. A control experiment was conducted by setting up five treatments: no fertilization, conventional fertilization, chemical fertilizer optimization, 15% organic fertilizer substitution, and 30% organic fertilizer substitution. The results showed that the soil physical and chemical properties and fruit quality of each organic fertilizer substitution treatment were improved to varying degrees compared with the blank non-fertilization and chemical fertilizer optimization. Among them, the soil pH value of 15% organic fertilizer substitution treatment was the highest, and the soil organic matter and alkali-hydrolyzable nitrogen content increased with organic fertilizer substitution ratio. The juice rate of 15% organic fertilizer substitution treatment was the highest, and the content of soluble solids was lower than that of conventional fertilization. At the same time, 15% organic fertilizer substitution treatment has the lowest total acid content. From the perspective of soil quality improvement and citrus quality improvement, 15% fertilizer organic fertilizer can be used instead of chemical fertilizer.

Key words: citrus, organic fertilizer, soil nutrients, quality