September 23, 2024 | 10:43 GMT +7
September 23, 2024 | 10:43 GMT +7
Hotline: 0913.378.918
It is difficult to make blanket recommendations on fall nitrogen fertilizer rates to pastures because of the variability in how forages are managed in the Fescue Belt, says University of Missouri Extension state nutrient management specialist John Lory. But fescue pastures need a source of nitrogen to thrive, he says.
“Judicious use” of nitrogen fertilizer, prioritizing low fertilizer rates to stands deficient in nitrogen, will maximize yields while limiting toxicity in fescue commonly found in Missouri pastures, Lory says.
As a general rule, limit annual fertilizer nitrogen applications to 60 pounds per acre to mitigate fescue toxicity in Kentucky 31 tall fescue, Missouri’s most-grown fescue variety. It is infected with an endophyte that is harmful to animal health.
Nitrogen boosts tall fescue yields, but it also increases toxic ergot alkaloid production. Failure to provide a nitrogen source such as fertilizer or an interseeded legume to hayfields and pastures will rapidly reduce productivity and the quality of the stand, says Lory.
Toxins in fescue affect overall animal health. Some animals such as pregnant mares should not consume any. Applying nitrogen increases the potential for low-performing animals and, in some cases, serious health issues.
Good management begins with an understanding of how toxin levels vary during the different plant growth stages, says Lory.
Toxicity occurs in all above-ground parts of the plant, with seed heads being most toxic. Leaves peak in toxicity in spring and again in the fall. Do not overgraze toxic stands, as stems near the crown are highly toxic.
Even without added nitrogen fertilizer, toxin levels quadrupled between April and June on fescue pastures at the MU Southwest Research, Extension and Education Center.
Lory recommends these strategies to limit the impact of toxic tall fescue on animal health:
MRN
(VAN) Grain production in the European Union/United Kingdom was revised sharply lower in COCERAL’s latest forecast as unfavorable weather conditions have taken a toll on the EU-27+UK crop.
(VAN) To advance Chinese modernization, Xi stressed the importance of persistently consolidating the country's agricultural foundation and promoting comprehensive rural revitalization.
(VAN) The Organization’s Anticipatory Action Plan outlines ways to safeguard millions of people at risk in view of the climate phenomenon’s potential devastating impacts.
(VAN) When it comes to bird welfare, science plays a key role in ensuring our chicks are well cared for during transport.
Stress in poultry can be caused by many factors, including environment, nutrition and management, and will result in a loss of production and efficiency.
(VAN) FAO Director-General participates at the first CELAC Fair and Permanent Coffee Forum.