Application of slow-controlled release fertilizer coordinates the carbon flow in carbon-nitrogen metabolism to effect rice quality

作者：Zhengrong Jiang, Qiuli Chen, Dun Liu, Weike Tao, Shen Gao, Jiaqi Li, Chunhao Lin, Meichen Zhu, Yanfeng Ding, Weiwei Li, Ganghua Li, Soulaïman Sakr, Lihong Xue · 发表于：BMC Plant Biology · 年份：2024 · DOI：10.1186/s12870-024-05309-9 · 被引用次数：23 · 研究领域：Polymer-Based Agricultural Enhancements、Plant nutrient uptake and metabolism、Rice Cultivation and Yield Improvement

Abstract Slow-controlled release fertilizers are experiencing a popularity in rice cultivation due to their effectiveness in yield and quality with low environmental costs. However, the underlying mechanism by which these fertilizers regulate grain quality remains inadequately understood. This study investigated the effects of five fertilizer management practices on rice yield and quality in a two-year field experiment: CK, conventional fertilization, and four applications of slow-controlled release fertilizer (UF, urea formaldehyde; SCU, sulfur-coated urea; PCU, polymer-coated urea; BBF, controlled-release bulk blending fertilizer). In 2020 and 2021, the yields of UF and SCU groups showed significant decreases when compared to conventional fertilization, accompanied by a decline in nutritional quality. Additionally, PCU group exhibited poorer cooking and eating qualities. However, BBF group achieved increases in both yield (10.8 t hm −2 and 11.0 t hm −2 ) and grain quality reaching the level of CK group. The adequate nitrogen supply in PCU group during the grain-filling stage led to a greater capacity for the accumulation of proteins and amino acids in the PCU group compared to starch accumulation. Intriguingly, BBF group showed better carbon–nitrogen metabolism than that of PCU group. The optimal nitrogen supply present in BBF group suitable boosted the synthesis of amino acids involved in the glycolysis/ tricarboxylic acid cycle, thereby effectively coordinating carbon–nit...