Variation in the magnesium concentration of ryegrass plants

Crush, J. R.

doi:10.1080/00288233.1983.10427040

Cited by 10 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is considerable inter and intra-species variation in the concentration of Mg in forages. Mean concentration of Mg (mg kg −1 DM ± SD) reported include: grass hay 1400 ± 520, grass silage 1700 ± 540, clover silage 2300 ± 750, lucerne hay 1700 ± 270, maize silage 2200 ± 690 (Suttle 2010 ), and ryegrasses ranging between 1300 and 5500 (Crush 1983 ), 1100–6800 (Crush et al 2018 ). Median Mg concentration in ryegrass and clover forages was reported to be 2200 (mg kg −1 DM) in New Zealand (Knowles and Grace 2014 ).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

View full text Add to dashboard Cite

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 Mgfertiliser 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 highgrowth spring grass conditions when hypomagnesaemia is most prevalent. Response to agronomic biofortification varied with cultivar, Mg-fertiliser rate,

show abstract

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Heritable variation in concentration of minerals has been demonstrated for most elements [sodium (Na) and potassium (K), Digitaria milianjiaa (Hacker et al 1985); magnesium (Mg), calcium (Ca), K, Agropyron spp. ; Na, Ca, Mg, S, phosphorus (P), iron (Fe), manganese (Mn), zinc (Zn), iodine (I), silicon (Si), but not K, chlorine (Cl), total N, NO 3 -N, or copper (Cu) (Rumball et al 1972); Mg, Ca, K, P, Festuca arundinacea (Sleper et al 1977Brown & Sleper 1980;Nguyen & Sleper 1981); K, Ca, Mg, Zn, Cu, Mn, P. arundinacea (Hovin et al 1978); Mg, L. multiflorum (Crush 1983;Moseley & Griffith 1984;Hides & Lovatt 1988)]. …”

Section: Cellular Proteinmentioning

confidence: 99%

Prospects for improving the nutritive value of temperate, perennial pasture grasses

Stone

1994

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

In this review, the impact of chemical, physical, and morphological characteristics of pasture grasses that affect their nutritive value either through voluntary food intake (palatability, leaf/ stem ratio, plant habit, dimensions of stems and leaves) and/or feed utilisation (cellular and cell wall constituents, anatomy and morphology, leaf and stem strength, anti-nutrients, and toxins) are summarised and the potential for improvement by selection or other means is discussed.

show abstract

“…Concentration of Ca was lower and concentration of Mg was higher in pasture residues compared with values reported by Borkert et al (2003) for black oat in southern Brazil. Nutrient concentrations in pasture species can be highly variable, due to different cultivars (Stratton and Sleper, 1979) and within particular cultivars (Crush, 1983). We used mixed black oat and Italian ryegrass to extend the winter grazing period.…”

Section: Resultsmentioning

confidence: 99%

Calcium and Magnesium Released from Residues in an Integrated Crop-Livestock System under Different Grazing Intensities

Assmann

Martins

Anghinoni

et al. 2017

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

Under integrated crop-livestock production systems (ICLS), plant and animal residues are important nutrient stocks for plant growth. Grazing management, by affecting the numbers of both plants and animals and the quality of residues, will influence nutrient release rates. The objective of this study was to evaluate the impact of grazing intensity on Ca and Mg release from pasture, dung, and soybean residues in a long-term no-till integrated soybean-cattle system. The experiment was established in May 2001 in a Latossolo Vermelho Distroférrico (Rhodic Hapludox). Treatments were a gradient of grazing intensity, determined by managing a black oat + Italian ryegrass pasture at 10, 20, 30, and 40 cm grazing height and no-grazing (NG), followed by soybean cropping. Ca and Mg release rates were determined in two entire cycles (2009/11). Moderate grazing (20 and 30 cm sward height) led to greater Ca and Mg release rates from pasture and dung residues, with low average half-life values (13 and 3 days for Ca and 16 and 6 days for Mg for pasture and dung, respectively). Grazing compared with NG resulted in greater Ca and Mg release from pasture and dung residues. Grazing intensity did not affect Ca and Mg release rates or amounts from soybean residues, but Ca and Mg release rates were greater from soybean leaves than from stems. Although moderate grazing intensities produce higher quality residues and higher calcium and magnesium release rates, a higher total nutrient amount is released by light grazing intensity and no-grazing, determined by higher residue production. Grazing intensity is, then, important for nutrient dynamics in the soil-plant-animal continuum.

show abstract

Variation in the magnesium concentration of ryegrass plants

Cited by 10 publications

References 14 publications

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

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

Prospects for improving the nutritive value of temperate, perennial pasture grasses

Calcium and Magnesium Released from Residues in an Integrated Crop-Livestock System under Different Grazing Intensities

Contact Info

Product

Resources

About