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Lu L, Wang Q, Zhang W, Gao M, Xv Y, Li S, Dong H, Chen D, Yan P, Dong Z. Urea Coated with Polyaspartic Acid-Chitosan Increases Foxtail Millet ( Setaria italica L. Beauv.) Grain Yield by Improving Nitrogen Metabolism. Plants (Basel) 2024; 13:415. [PMID: 38337948 PMCID: PMC10857690 DOI: 10.3390/plants13030415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/26/2024] [Accepted: 01/26/2024] [Indexed: 02/12/2024]
Abstract
Innovative measures of nitrogen (N) fertilization to increase season-long N availability is essential for gaining the optimal foxtail millet (Setaria italica L. Beauv.) productivity and N use efficiency. A split plot field experiment was conducted using the foxtail millet variety Huayougu 9 in 2020 and 2021 in Northeast China to clarify the physiological mechanism of a novel polyaspartic acid-chitosan (PAC)-coated urea on N assimilation and utilization from foxtail millet. Conventional N fertilizer (CN) and the urea-coated -PAC treatments were tested under six nitrogen fertilizer application levels of 0, 75, 112.5, 150, 225, and 337.5 kg N ha-1. The results showed that compared to CN, PN increased the foxtail millet yield by 5.53-15.75% and 10.43-16.17% in 2020 and 2021, respectively. PN increased the leaf area index and dry matter accumulation by 7.81-18.15% and 12.91-41.92%, respectively. PN also enhanced the activities of nitrate reductase, glutamine synthetase, glutamic oxaloacetic transaminase, and glutamic-pyruvic transaminase, thereby increasing the soluble protein in the leaf, plant, and grain N content at harvest compared to CN. Consequently, partial factor productivity from applied N, the agronomic efficiency of applied N, recovery efficiency of applied N, and physiological efficiency of applied N of foxtail millet under PN treatments compared to CN were increased. The improvement effect of the items above was more noticeable under the low-middle N application levels (75, 112.5, and 150 kg N ha-1). In conclusion, the PAC could achieve the goal of high yield and high N use efficiency in foxtail millet under the background of a one-time basic fertilizer application.
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Affiliation(s)
- Lin Lu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (L.L.); (W.Z.); (Y.X.); (H.D.); (D.C.)
| | - Qi Wang
- Beijing Agricultural Technology Extension, Beijing 100029, China;
| | - Wei Zhang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (L.L.); (W.Z.); (Y.X.); (H.D.); (D.C.)
- College of Resources and Environment, Shanxi Agricultural University, Jinzhong 030801, China
| | - Ming Gao
- Institute of Crop Resources Sciences, Jilin Academy of Agricultural Sciences, Changchun 130033, China; (M.G.); (S.L.)
| | - Yanli Xv
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (L.L.); (W.Z.); (Y.X.); (H.D.); (D.C.)
| | - Shujie Li
- Institute of Crop Resources Sciences, Jilin Academy of Agricultural Sciences, Changchun 130033, China; (M.G.); (S.L.)
| | - Haosheng Dong
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (L.L.); (W.Z.); (Y.X.); (H.D.); (D.C.)
| | - Disu Chen
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (L.L.); (W.Z.); (Y.X.); (H.D.); (D.C.)
| | - Peng Yan
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (L.L.); (W.Z.); (Y.X.); (H.D.); (D.C.)
| | - Zhiqiang Dong
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (L.L.); (W.Z.); (Y.X.); (H.D.); (D.C.)
- College of Resources and Environment, Shanxi Agricultural University, Jinzhong 030801, China
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