Impact of selenium biofortification on production characteristics of forages grown following standard management practices in Oregon.

Autor:	Hall JA; Department of Biomedical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR, United States., Bobe G; Department of Animal and Rangeland Sciences, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States.; Linus Pauling Institute, Oregon State University, Corvallis, OR, United States., Filley SJ; Department of Animal and Rangeland Sciences, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States., Bohle MG; Department of Crop and Soil Science, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States., Pirelli GJ; Department of Animal and Rangeland Sciences, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States., Wang G; Department of Crop and Soil Science, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States., Davis TZ; United States Department of Agriculture (USDA), Agricultural Research Service-Poisonous Plant Research Lab, Logan, UT, United States., Bañuelos GS; United States Department of Agriculture (USDA), Agricultural Research Service-San Joaquin Valley Agricultural Sciences Center, Parlier, CA, United States.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2023 Mar 31; Vol. 14, pp. 1121605. Date of Electronic Publication: 2023 Mar 31 (Print Publication: 2023).
DOI:	10.3389/fpls.2023.1121605
Abstrakt:	Introduction: Low selenium (Se) concentrations in soils and plants pose a health risk for ruminants consuming locally-grown forages. Previous studies have shown that Se concentrations in forages can be increased using soil-applied selenate amendments. However, the effects of foliar selenate amendments applied with traditional nitrogen-phosphorus-potassium-sulfur (NPKS) fertilizers on forage yields, and nutrient contents, and agronomic efficiencies are unknown. Methods: Using a split plot design, we determined the effects of springtime sodium selenate foliar amendment rates (0, 45, and 90 g Se ha -1 ) and NPKS application (none, NPK for grasses/PK for alfalfa, and NPKS/PKS fertilization at amounts adapted to meet local forage and soil requirements) on forage growth and N, S, and Se concentrations, yields, and agronomic efficiencies. This 2-year study was conducted across Oregon on four representative forage fields: orchardgrass ( Dactylis glomerata L.) in Terrebonne (central Oregon), grass-clover mixture in Roseburg (southwestern Oregon), and both grass mixture and alfalfa ( Medicago sativa L.) fields in Union (eastern Oregon). Results: Grasses grew poorly and were low in N content without NPK fertilization. Fertilization with NPK/PK promoted forage growth, increased forage N concentrations, and had to be co-applied with S when plant available S was low. Without Se amendment, forage Se concentrations were low and further decreased with NPKS/PKS fertilization. Selenate amendment linearly increased forage Se concentration without adversely affecting forage yields, N and S concentrations, or N and S agronomic efficiencies. Discussion: Importantly, S fertilization did not interfere with Se uptake in Se amended plots. In conclusion, co-application of NPKS/PKS fertilizers and foliar sodium selenate in springtime is an effective strategy to increase forage total Se concentrations, while maintaining optimal growth and quality of Oregon forages. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2023 Hall, Bobe, Filley, Bohle, Pirelli, Wang, Davis and Bañuelos.)
Databáze:	MEDLINE
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