Abstract:

To explore fertilizer reduction and efficiency enhancement technology in rice, a field experiment was conducted using slow-release fertilizer combined with humic acid urea. Four reduced-fertilizer treatments (T1, T2, T3, T4), a conventional fertilization treatment (T5), and a blank control (T6) were designed. The yield, economic benefit, and fertilizer utilization efficiency of the rice cultivar Jiayou Zhongke 3 were evaluated under each treatment. The results showed that compared with the T5 treatment, the yields of T1, T2, and T3 treatments increased, while the yield of T4 treatment decreased. All reduced-fertilizer treatments (T1-T4) exhibited improved economic benefit, partial fertilizer productivity, and partial nitrogen productivity. The amount of nitrogen application was the key factor affecting rice yield, while the application of P₂O₅ and K₂O had little impact on the yield and economic benefits of Jiayou Zhongke 3. This study provides a theoretical basis for optimizing fertilizer reduction and efficiency enhancement technology for Jiayou Zhongke 3.

Key words: rice, Jiayou Zhongke 3, fertilizer reduction and efficiency enhancement technology, yield, economic benefit