Blended controlled-release nitrogen fertilizer increases rice post-anthesis nitrogen accumulation, translocation and nitrogen-use efficiency

• DOI: 10.3389/fpls.2024.1354384
• Publication Date: 2024-04-29T04:34:53Z
• Authors: Manman Yuan; Gang Wu; Jiabao Wang; Chuang Liu; Yegong Hu; Run Hu; Yan Zhou; Xiangming Zhang; Wenjun Wang; Yixiang Sun
• Keywords: Panicle; Anthesis

One-time application of blended controlled-release nitrogen fertilizer (CRN) has the potential to solve difficulty top-dressing in cultivation rice and reduce cost CRN application. However, its effects on dry matter (N) accumulation translocation, yield N-use efficiency (NUE) remain uncertain. Field experiments were carried out at three sites (Mingguang, Chaohu, Guichi) Yangtze River Delta China compare conventional split applications urea post-anthesis N yield, NUE 0, 60, 120, 180, 240 kg ha -1 . The results showed that equal rates, compared under treatment, significantly increased by an average 0.9-6.9%, mainly due increase number spikelets per panicle. highest achieved with treatment occurred 200 , 45.9%. Moreover, comparison fertilizer, pre-anthesis translocation (Pre-NT) 1.0-19.8%, contribution pre-NT grain 0.2-8.7%, 3.2-28.4%. Meanwhile, reduced labor costs 1800 Yuan enhanced economic gains 21.5-68.8%. Therefore, one-time ≤ rate improved NUE, profit equivalent rates applied fertilizers.