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Magnesium biofortification of Italian ryegrass (Lolium multiflorum L.) via agronomy and breeding as a potential way to reduce grass tetany in grazing ruminants

Kumssa, Diriba B. ; Lovatt, J. Alan ; Graham, Neil S. ; Palmer, Sarah ; Hayden, Rory ; Wilson, Lolita ; Young, Scott D. ; Lark, R. Murray ; Penrose, Beth ; Ander, E. Louise ; Thompson, Russell ; Jiang, Lin-Xi ; Broadley, Martin R.

Plant and soil, 2020-12, Vol.457 (1-2), p.25-41 [Periódico revisado por pares]

Cham: Springer International Publishing

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Título:
Magnesium biofortification of Italian ryegrass (Lolium multiflorum L.) via agronomy and breeding as a potential way to reduce grass tetany in grazing ruminants
Autor: Kumssa, Diriba B. ; Lovatt, J. Alan ; Graham, Neil S. ; Palmer, Sarah ; Hayden, Rory ; Wilson, Lolita ; Young, Scott D. ; Lark, R. Murray ; Penrose, Beth ; Ander, E. Louise ; Thompson, Russell ; Jiang, Lin-Xi ; Broadley, Martin R.
Assuntos: Agronomy ; Analysis ; Biomedical and Life Sciences ; Breeding ; Composts ; Cultivars ; Dry matter ; Ecology ; Fertilizers ; Forage ; Grasses ; Grazing ; Growth ; Life Sciences ; Lolium multiflorum ; Magnesium ; Magnesium chloride ; Metabolic disorders ; Methods ; Plant breeding ; Plant Physiology ; Plant Sciences ; Regular ; Regular Article ; Ryegrasses ; Sheep ; Soil Science & Conservation ; Tetany ; Weather
É parte de: Plant and soil, 2020-12, Vol.457 (1-2), p.25-41
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Responsible Editor: Ismail Cakmak.
Descrição: Aim Magnesium (Mg) deficiency (known as grass tetany) is a serious metabolic disorder that affects grazing ruminants. We tested whether Mg-fertiliser can increase Mg concentration of Italian ryegrasses ( Lolium multiflorum L.) including a cultivar (cv. Bb2067; ‘Magnet’), bred to accumulate larger concentrations of Mg. Methods Under controlled environment (CE) conditions, three cultivars (cv. Bb2067, cv. Bb2068, cv. RvP) were grown in low-nutrient compost at six fertiliser rates (0–1500 μM MgCl 2 .6H 2 O). Under field conditions, the three cultivars in the CE condition and cv. Alamo were grown at two sites, and four rates of MgSO 4 fertiliser application rates (0–200 kg ha −1 MgO). Multiple grass cuts were taken over two-years. Results Grass Mg concentration increased with increasing Mg-fertiliser application rates in all cultivars and conditions. Under field conditions, cv. Bb2067 had 11–73% greater grass Mg concentration and smaller forage tetany index (FTI) than other cultivars across the Mg-fertiliser application rates, sites and cuts. Grass dry matter (DM) yield of cv. Bb2067 was significantly ( p < 0.05) smaller than cv. Alamo. The effect of Mg-fertiliser rate on DM yield was not significant ( p ≥ 0.05). Conclusions Biofortification of grass with Mg through breeding and agronomy can improve the forage Mg concentration for grazing ruminants, even in high-growth spring grass conditions when hypomagnesaemia is most prevalent. Response to agronomic biofortification varied with cultivar, Mg-fertiliser rate, site and weather. The cost:benefit of these approaches and farmer acceptability, and the impact on cattle and sheep grazing on grasses biofortified with Mg requires further investigation.
Editor: Cham: Springer International Publishing
Idioma: Inglês

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Magnesium biofortification of Italian ryegrass (Lolium multiflorum L.) via agronomy and breeding as a potential way to reduce grass tetany in grazing ruminants

Kumssa, Diriba B. ; Lovatt, J. Alan ; Graham, Neil S. ; Palmer, Sarah ; Hayden, Rory ; Wilson, Lolita ; Young, Scott D. ; Lark, R. Murray ; Penrose, Beth ; Ander, E. Louise ; Thompson, Russell ; Jiang, Lin-Xi ; Broadley, Martin R.

Cham: Springer International Publishing

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