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- Title
Timothy Response to Increasing Rates of Selenium Fertilizer in Eastern Canada.
- Authors
Tremblay, Gaetan F.; Belanger, Gilles; Lajeunesse, Julie; Chouinard, P. Yvan; Charbonneau, Edith
- Abstract
Selenium is an essential micronutrient given to ruminants by injection or orally or applied as an additive to fertilizers to raise crop Se concentrations in areas with low-Se soils. We determined the response of timothy (Phleum pratense L.) Se concentration to increasing rates (0, 5, 10, 15, 20, and 25 g Se ha-1) of a slow-release Se fertilizer (Selcote Ultra) applied in spring of 2010 at three sites in Qviebec, Canada, and investigated the possibility of predicting forage Se concentration by near-infrared reflectance spectroscopy (NIRS). The response of timothy Se concentration (γ, mgkg-1 dry matter, DM) to increasing Se rates (x) was similar at the three sites; averaged across sites, it increased linearly with increasing Se rates at the first (γ = 0.012 + 0.0292x; R² = 0.98) and second harvests (γ = 0.052 + 0.0091x; R²= 0.96) in the year of spring Se application and in the first harvest of the subsequent year (γ = 0.012 + 0.0117x; R² = 0.97). Selenium fertilization did not affect timothy DM yield, fiber concentration, or digestibility. Timothy Se concentration could not be successfully predicted by NIRS. A spring application of 10 g Se ha-1 as a slow-release fertilizer and its residual effect are sufficient to produce timothy with an adequate Se concentration (>0.1 mg kg-1 DM) to prevent deficiency diseases in livestock and allow diet formulation to meet optimal Se levels.
- Subjects
SELENIUM; FERTILIZATION (Biology); FERTILIZERS; PLANT nutrition; AGRICULTURAL research
- Publication
Agronomy Journal, 2015, Vol 107, Issue 1, p211
- ISSN
0002-1962
- Publication type
Article
- DOI
10.2134/agronj14.0397