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Optimal nitrogen management to achieve high wheat grain yield, grain protein content, and water productivity: A meta-analysis.
- Source :
-
Agricultural Water Management . Dec2023, Vol. 290, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Nitrogen (N) addition is commonly employed to enhance wheat production, and the effectiveness is strongly influenced by site-specific factors encompassing environmental conditions and crop management practices. However, the current understanding fails to adequately account for the intricate and variable interactions among these factors. Consequently, we conducted a global meta-analysis to quantify the combined contributions of these factors to wheat yield, grain protein content (GPC), and water productivity (WP) and provide recommendations for optimizing N management. The results revealed a significant improvement in grain yield (14.85%), GPC (6.62%), and WP (10.79%) following the application of N. Moreover, higher N addition rates, the utilization of coated N fertilizer, post-anthesis fertilization, and multiple N applications exhibited enhanced outcomes in terms of yield, GPC, and WP in wheat systems. It was observed that applying 100–200 kg/ha of N was the optimal rate for maximizing yield, GPC, and WP. Medium soil texture and humid climate conditions showed a more pronounced increase in yield in response to N addition. Additionally, wheat yield demonstrated a stronger response to N addition benefits when the annual temperature was below 14 °C, while GPC showed a higher increase with temperatures exceeding 14 °C. Furthermore, adopting common N fertilization practices alongside irrigation and implementing pre-anthesis N addition in medium soil texture and humid climate conditions also contributed to achieving optimal wheat performance. The finding of this study serves as a guideline to support on-site N addition practice for wheat and to offer a reference to N management policy design across specific site conditions. • N application increased grain yield, grain protein content (GPC), and water productivity (WP). • Higher N addition rates, the utilization of coated N fertilizer, post-anthesis fertilization, and multiple N applications enhanced the increase of yield, GPC, and WP. • Medium soil texture and humid climate conditions showed a more pronounced yield increase to N addition. • Wheat yield responded greater to N addition when the annual temperature was below 14°C. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITROGEN fertilizers
*WHEAT
*CROP management
*SOIL texture
*NITROGEN
Subjects
Details
- Language :
- English
- ISSN :
- 03783774
- Volume :
- 290
- Database :
- Academic Search Index
- Journal :
- Agricultural Water Management
- Publication Type :
- Academic Journal
- Accession number :
- 173943028
- Full Text :
- https://doi.org/10.1016/j.agwat.2023.108587