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Annual Ryegrass

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Bhagirath S Chauhan – One of the best experts on this subject based on the ideXlab platform.

  • Annual Ryegrass lolium rigidum gaud competition altered wheat grain quality a study under elevated atmospheric co2 levels and drought conditions
    Food Chemistry, 2019
    Co-Authors: Nimesha Fernando, Singarayer Florentine, Mani Naiker, J F Panozzo, Bhagirath S Chauhan

    Abstract:

    Annual Ryegrass is one of the most serious, costly weeds of winter cropping systems in Australia. To determine whether its competition-mediated plant defence mechanisms effect on wheat grain quality, wheat (cv. Yitpi) and Annual Ryegrass were grown under two levels of CO2 (400 ppm; (a[CO2]) vs 700 ppm; (e[CO2]), two levels of water (well-watered vs drought) and two types of competition (wheat only; (W), and wheat × Annual Ryegrass; (W × R) with four replicates. The competition × [CO2] interaction had a significant effect on wheat grain protein content, where it was increased in W × R under both e[CO2] (+17%) and a[CO2] (+21%). Grain yield, total grain reducing power and phenolic content were significantly affected by [CO2] × drought × competition. In a summary, Annual Ryegrass competition significantly altered the wheat grain quality under both [CO2] levels (depending on the soil water level), while also decreasing the grain yield.

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James K. Yarborough – One of the best experts on this subject based on the ideXlab platform.

  • triticale Annual Ryegrass mixture effects on forage characteristics and performance of early weaned beef calves
    The Professional Animal Scientist, 2016
    Co-Authors: Joao M. B. Vendramini, John D. Arthington, Fábio Cortez Leite De Oliveira, A. D. Aguiar, Philipe Moriel, Joao M.d. Sanchez, Cecílio Viega Soares Filho, James K. Yarborough

    Abstract:

    ABSTRACT Mixing small grains with Annual Ryegrass (Lolium multiflorum) may be a feasible management practice to improve forage production for early-weaned beef calves in the southeastern United States. The objective of this experiment was to evaluate forage characteristics and animal performance of early-weaned beef calves grazing Annual Ryegrass or Annual Ryegrass–triticale (X Triticosecale) mixed pastures. The experiment was conducted at Ona, Florida, from February to April 2011 (yr 1) and 2012 (yr 2). Treatments were Annual Ryegrass or triticale–Annual Ryegrass pastures distributed in a completely randomized design with 4 replicates. Four calves (mean initial BW = 100 ± 13 kg) were allocated to each pasture (0.3 ha) using a continuous and fixed stocking rate. Calves were supplemented daily with concentrate (16% CP and 78% TDN) at 1% BW. Herbage mass was greater (P = 0.01) for the triticale–Annual Ryegrass than Annual Ryegrass treatment in yr 1 (2,730 vs. 2,080 ± 100 kg/ha), but there was no difference (P = 0.87) between treatments in yr 2 (1,750 ± 120 kg/ha). The Annual Ryegrass treatment had greater CP (19.5 vs. 15.0 ± 0.7%) and in vitro OM disappearance (80.6 vs. 76.2 ± 1.7%) than the triticale–Annual Ryegrass in yr 2. Calf ADG decreased from February to April (P = 0.04) and was greater (P

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  • Triticale–Annual Ryegrass mixture effects on forage characteristics and performance of early-weaned beef calves
    The Professional Animal Scientist, 2016
    Co-Authors: Joao M. B. Vendramini, John D. Arthington, Fábio Cortez Leite De Oliveira, A. D. Aguiar, Philipe Moriel, Joao M.d. Sanchez, Cecílio Viega Soares Filho, James K. Yarborough

    Abstract:

    ABSTRACT Mixing small grains with Annual Ryegrass (Lolium multiflorum) may be a feasible management practice to improve forage production for early-weaned beef calves in the southeastern United States. The objective of this experiment was to evaluate forage characteristics and animal performance of early-weaned beef calves grazing Annual Ryegrass or Annual Ryegrass–triticale (X Triticosecale) mixed pastures. The experiment was conducted at Ona, Florida, from February to April 2011 (yr 1) and 2012 (yr 2). Treatments were Annual Ryegrass or triticale–Annual Ryegrass pastures distributed in a completely randomized design with 4 replicates. Four calves (mean initial BW = 100 ± 13 kg) were allocated to each pasture (0.3 ha) using a continuous and fixed stocking rate. Calves were supplemented daily with concentrate (16% CP and 78% TDN) at 1% BW. Herbage mass was greater (P = 0.01) for the triticale–Annual Ryegrass than Annual Ryegrass treatment in yr 1 (2,730 vs. 2,080 ± 100 kg/ha), but there was no difference (P = 0.87) between treatments in yr 2 (1,750 ± 120 kg/ha). The Annual Ryegrass treatment had greater CP (19.5 vs. 15.0 ± 0.7%) and in vitro OM disappearance (80.6 vs. 76.2 ± 1.7%) than the triticale–Annual Ryegrass in yr 2. Calf ADG decreased from February to April (P = 0.04) and was greater (P

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Deirdre Lemerle – One of the best experts on this subject based on the ideXlab platform.

  • Canola (Brassica napus) germplasm shows variable allelopathic effects against Annual Ryegrass (Lolium rigidum)
    Plant and Soil, 2014
    Co-Authors: M. Asaduzzaman, James E. Pratley, Min An, David J. Luckett, Deirdre Lemerle

    Abstract:

    Aims The allelopathic activity of canola ( Brassica napus ) germplasm was investigated using the important Australian weed, Annual Ryegrass ( Lolium rigidum ) as the target species. Methods Three different canola plant densities (10, 20, and 30 seedlings/beaker) of each of 70 world-wide genotypes were tested in vitro in close proximity to Annual Ryegrass seedlings. Results The allelopathic activity of canola, as measured by reduction in Annual Ryegrass root and shoot growth, increased with canola crop seedling densities. Density did not consistently influence shoot length of Annual Ryegrass. Greater shoot length suppression was observed in genotype cv. Rivette and BLN3343CO0402. The Australian genotype cv. Av-opal and the breeding line Pak85388-502 suppressed root length of Ryegrass more than other genotypes, even at low densities. At the lowest density, the least allelopathic genotypes were cv. Barossa and cv. Cescaljarni-repka, although they became more allelopathic at higher density. An overall inhibition index was calculated to rank each of the canola genotypes. There were significant differences between canola genotypes in their ability to inhibit root and shoot growth in Ryegrass. Conclusion Considerable genetic variation exists among canola genotypes for their allelopathic effects on Annual Ryegrass. Further investigation is required to determine the allelopathic mechanisms, particularly to identify the responsible allelochemical(s) and the gene(s) controlling the trait. This research suggests that highly allelopathic canola genotypes can be potential for controlling weeds such as Annual Ryegrass in integrated weed management programs.

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  • Canola (Brassica napus) germplasm shows variable allelopathic effects against Annual Ryegrass (Lolium rigidum)
    Plant and Soil, 2014
    Co-Authors: M. Asaduzzaman, David J. Luckett, James Pratley, Deirdre Lemerle

    Abstract:

    Aims
    The allelopathic activity of canola (Brassica napus) germplasm was investigated using the important Australian weed, Annual Ryegrass (Lolium rigidum) as the target species.

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