Dry matter yield, nutritive value and tiller density of tall fescue and perennial ryegrass swards under grazing

Hendricks, S. B.; Donaghy, DJ; Matthew, C.; Bretherton, Mike; Sneddon, NW; Cosgrove, G. P.; Christensen, Christine; Kaufononga, Salesi; Howes, J. R.; Osborne, MA; Taylor, P. S.; Hedley, M. J.

doi:10.33584/jnzg.2016.78.512

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…Quantitative analyses of PFTs at sward and plant level are lacking in frequently defoliated pastures. Previous studies analysing PFTs in managed grasslands are limited to a comparison of grass species [18,19], the general importance of PFTs for grassland ecology and ecosystems [20,21], or focus on single individual PFTs such as TD [22] or the effect of PFTs on forage quality [23]. Furthermore, the effect of N application rate on the expression and development of PFTs in grass swards were rarely studied.…”

Section: Introductionmentioning

confidence: 99%

How Does Nitrogen Application Rate Affect Plant Functional Traits and Crop Growth Rate of Perennial Ryegrass-Dominated Permanent Pastures?

et al. 2021

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High doses of nitrogen (N) fertiliser input on permanent pastures are crucial in terms of N surplus and N losses. Quantitative analyses of the response of plant functional traits (PFT) driving crop growth rate (CGR) under low N input are lacking in frequently defoliated pastures. This study aimed to understand the significance of PFTs for productivity and N uptake in permanent grasslands by measuring dynamics in tiller density (TD), tiller weight (TW), leaf weight ratio (LWR), leaf area index (LAI), specific leaf area (SLA), as well as leaf N content per unit mass (LNCm) and per unit area (LNCa) in perennial ryegrass (Lolium perenne)-dominated pastures, in a simulated rotational grazing approach over two consecutive growing seasons. Annual N application rates were 0, 140 and 280 kg N ha−1. The phenological development of perennial ryegrass was the main driver of CGR, N uptake and most PFTs. The effect of N application rate on PFTs varied during the season. N application rate showed the greatest effect on TD, LAI and, to a lesser extent, on SLA and LNCm. The results of this study highlight the importance of TD and its role in driving CGR and N uptake in frequently defoliated permanent pastures.

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Section: Introductionmentioning

confidence: 99%

How Does Nitrogen Application Rate Affect Plant Functional Traits and Crop Growth Rate of Perennial Ryegrass-Dominated Permanent Pastures?

et al. 2021

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“…By comparing the obtained results to those of other plant species in the Egyptian flora, for instance, the nutritive value of Atriplex species, Medicago sativa and Trifolium alexandrinum found to be higher than those of the studied Fagonia species [1,[36][37][38][39][40], while the nutritive values of the studied species of Fagonia genus were higher than the species studied by Maswada [41] and Hendriks et al [42].…”

Section: Proximate Compositionmentioning

confidence: 96%

Proximate Composition, Mineral Content and Secondary Metabolites of Three Medicinal Wild Fagonia Species

et al. 2020

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Proximate composition of the aerial parts of three Fagonia species (Fagonia arabica L., F. mollis Delile and F. cretica L.) collected from different habitats were analyzed. Macro- and micro-elements as well as some secondary metabolites were estimated. The obtained results revealed that F. creticus contains appreciable levels of nutritive components considering that its nutritional value (351.06 kcal/100g dry wt.) was remarkably higher than that of F. arabica and F. mollis (327.99 and 293.07 kcal/100g dry wt., respectively). The concentration of Na was relatively the highest among the other estimated macroelements in the studied species followed by K, Ca and Mg, respectively while Fe was the highest microelement followed by Cu, Mn and Zn, respectively. The phytochemical composition revealed that methanolic extract of F. creticus was the richest in total alkaloids and flavonoids, while F. arabica found to be the richest in total phenolics and tannins.

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“…Chiov. ), and cocksfoot (Dactylis glomerata L.) (Fulkerson et al 1993;Fulkerson & Slack 1994Donaghy et al 1997Donaghy et al , 2008Fulkerson et al 1998Fulkerson et al , 2000Fulkerson & Donaghy 2001;Rawnsley et al 2002Rawnsley et al , 2014Turner et al 2006a, b;Hendriks et al 2016;Kaufononga et al 2017;Pembleton et al 2017). At the lower (more frequent) scale of defoliation, the grazing interval should allow enough time for plants to regain their energy reserves to 'cope' with another grazing (i.e., the 2-leaf stage in ryegrass pastures; Donaghy & Fulkerson 1998), while at the upper (less frequent) scale of defoliation, the grazing interval should avoid significant herbage senescence and declining herbage nutritive value (i.e., the 3-leaf stage in ryegrass pastures; Fulkerson & Donaghy 2001).…”

Section: Current Recommendations For Grazing Management: the Plant Levelmentioning

confidence: 99%

Will current rotational grazing management recommendations suit future intensive pastoral systems?

et al. 2021

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This review aimed to determine whether current grazing management practices will suit future intensive rotationally grazed pastoral systems. A review of literature on grazing management recommendations found that there was good agreement on the ‘principles’ required for optimal grazing management. While these management practices have stood the test of time, it is concluded that shifts in external pressures (e.g., climate, plant selection and breeding, system intensification) compared to the period when farm-level grazing recommendations were first developed, may necessitate a rethink of current grazing recommendations. Examples include greater pasture masses (e.g., around 4000 kg dry matter (DM)/ha vs. the recommended range of 2600 to 3200 kg DM/ha) where short-rotation (annual, biennial) and tetraploid ryegrasses are sown, provided a consistent post-grazing residual can be maintained (possibly between 40- and 70- mm height). Milder winters and the use of ryegrass cultivars with higher growth rates in late winter/early spring may necessitate either lower target pasture covers at calving or shorter rotation lengths during winter. Longer grazing rotations (well beyond the 3-leaf stage, i.e., equivalent to deferred grazing) can be recommended for select paddocks from mid-spring into summer, to increase seasonal resilience across the farm. Longer residuals (even up to 70 mm - i.e., almost double the recommended height) might improve plant survival during periods of high stress (e.g., heatwaves, droughts). Lastly, diverse species pastures may require specific management to suit dominant species other than perennial ryegrass.

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Dry matter yield, nutritive value and tiller density of tall fescue and perennial ryegrass swards under grazing

Cited by 9 publications

References 16 publications

How Does Nitrogen Application Rate Affect Plant Functional Traits and Crop Growth Rate of Perennial Ryegrass-Dominated Permanent Pastures?

How Does Nitrogen Application Rate Affect Plant Functional Traits and Crop Growth Rate of Perennial Ryegrass-Dominated Permanent Pastures?

Proximate Composition, Mineral Content and Secondary Metabolites of Three Medicinal Wild Fagonia Species

Will current rotational grazing management recommendations suit future intensive pastoral systems?

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