The Impact of Herbage Mass on Perennial Ryegrass Swards in Autumn on Autumn and over Winter Production and Characteristics

Looney, Caitlin; Wingler, Astrid; Egan, M.

doi:10.3390/agronomy11061140

Cited by 3 publications

(4 citation statements)

References 27 publications

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“…Post defoliation, all plots were found to return to approximately 79 ± 2.9% light at the base of the sward in autumn, and there was no effect on tiller density [30]. This increased light transmission to the base of the sward [38] would have stimulated the production of tillers [26,39], giving enough growing points for production [27] in spring.…”

Section: Discussionmentioning

confidence: 91%

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The Impact of Accumulating Herbage Masses in Autumn on Perennial Ryegrass Sward Characteristics

Looney,

Wingler,

Donaghy

et al. 2024

Agronomy

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Autumn grazing management aims to accumulate herbage for defoliation prior to a decrease in growth rates for the extension of the grazing season. The current study investigated the impact of building different target herbage masses (THMs) in autumn and imposing one of three different defoliation dates (DDs) between mid-October and late November on light transmitted to the base of the sward, free leaf lamina (FLL), leaf stage and internode elongation. Four THMs (low, medium, high and very high) and three DDs (DD1—15 October, DD2—7 November and DD3—21 November) were assigned to a 4 × 3 split plot design over two years. Light transmitted to the base of the sward was greatest in the low THM and decreased in all other THMs. Internode elongation increased in tillers in the medium to the very high THMs. Defoliation of the medium, high and, in particular, the very high THMs earlier in autumn reduced the effect of decreased light transmission on internode elongation. This study highlights that, as light transmitted to the base of the sward decreases, internode elongation increases, and this could negatively impact sward structure.

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Section: Discussionmentioning

confidence: 91%

“…Meteorological data were recorded at the experimental site over the experimental period (October to February). Average daily air temperature ( • C), soil temp to a depth of 100 mm ( • C), total daily rainfall (mm) and average solar radiation are shown for the measurement periods in each experimental year [30].…”

Section: Sitementioning

confidence: 99%

The Impact of Accumulating Herbage Masses in Autumn on Perennial Ryegrass Sward Characteristics

Looney,

Wingler,

Donaghy

et al. 2024

Agronomy

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“…Residual grass growing over the winter period was cut and removed prior to trial commencement, using a mower to a height of 40 mm in line with Looney et al [24]. To align the trial with fertiliser end-use conditions, the commercial compound was selected from a list of commercially available blends.…”

Section: Fertilisationmentioning

confidence: 99%

The Extended Effect of Top-Dressed Recovered Struvite Fertiliser on Residual Irish Grassland Soil Phosphorus Levels Compared to Commercial Phosphorus Fertiliser

et al. 2021

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Phosphorus (P) is an essential growth-limiting nutrient that cannot be synthetically produced. Mineral P fertilisers are typically applied to crops to sustain modern farming practice and food production. These fertilisers are generally derived from finite phosphate ore, for which there is much concern over long-term sustainability. To address these concerns, various technologies have been developed to recover P from municipal wastewater treatment plants. One product recovered from these processes is struvite, which is a precipitate formed of magnesium, ammonium, and phosphate. To analyse the fertilisation value of the recovered struvite, field trials were conducted on perennial ryegrass (Lolium perenne) over three growing seasons, analysing the dry matter yield of recovered struvite fertiliser. The trial was based on a three-crop silage system designed to mimic typical Irish agricultural practice. This research highlights that recovered struvite as a fertiliser provides additional benefits including increasing the soil P levels. The struvite test case produced a statistically significantly increased soil P level from the baseline of Morgan’s extractable P content of 6.4 mg/L to the optimum Morgan’s soil P level of 11.13 mg/L. The findings of this research provide insight into the added benefits of recovered struvite fertiliser as a sustainable renewable P fertiliser.

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“…Alternatively, the practice of 'autumn saved pastures' (stockpiling) is introduced to fill the gap, wherein the pasture is conserved for feeding dairy cows for 1 to 2 months pre-and post-calving during winter and early spring [16]. In addition, the slow pasture growth in cooler conditions leads to limited senescence accumulation [17]. Ryegrass types, including perennial (Perennial, Lolium perenne L.), hybrid (Hybrid, L. perenne × Lolium multiflorum L.), and Italian (Italian, L. multiflorum) ryegrasses, have demonstrated adaptability, resilience, forage quality, and growth over other species in cold environments [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Chemical, Physical, and Degradation Characteristics of Ryegrass Cultivars Grown in Autumn and Winter for Dairy Cows

Sun,

Chen,

2023

Animals

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During winter and early spring, pasture supply is usually lower than the demand in New Zealand dairy farming systems and thus the ‘autumn saved pastures’ (stockpiling) are introduced to fill the gap. This study aimed to investigate the chemical, physical, and degradation characteristics of ryegrass pastures, the predominant forage in New Zealand, grown in autumn and winter. To serve as ‘autumn saved pasture’, nine ryegrass cultivars, comprising three types (three perennial, three hybrid, and three Italian), were grown in late autumn (Autumn) and early winter (Winter) and harvested after 7 and 9 weeks of regrowth, respectively. The experiment had two experimental factors: ryegrass type (or cultivar) and harvest season. These experimental factors were in a randomised block design with the forage plot as the experimental unit. The degradation characteristics were assessed in the rumen of fistulated cows using the in situ incubation technique. Perennial ryegrass had a greater neutral detergent fibre (NDF) concentration (468 g/kg dry matter (DM)) than the hybrid (435 g/kg DM) or Italian (414 g/kg DM) ryegrasses. Italian ryegrasses had the greatest soluble fraction of DM (64.2% vs. 46.7% and 40.7%) and the greatest degradation rate of an insoluble but degradable fraction of DM (0.221 vs. 0.189 and 0.145/h) than the hybrid and perennial ryegrasses. Compared with the Winter ryegrass, the Autumn ryegrass had a greater crude protein concentration (246 vs. 208 g/kg DM) and a greater NDF concentration (486 vs. 392 g/kg DM) but a lower calculated soluble carbohydrate concentration (152 vs. 263 g/kg DM). It is concluded that there are notable variations among the cultivars, highlighting distinctions in parameters, such as NDF concentration, soluble fractions, degradation rates, and nutrient content among the perennial, hybrid, and Italian ryegrasses, as well as the seasonal variations observed between autumn and winter growth. These findings will not only facilitate enhanced nutrition for dairy cows as they undergo the transition phase but also have practical implications for future research and dairy cow nutrition.

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The Impact of Herbage Mass on Perennial Ryegrass Swards in Autumn on Autumn and over Winter Production and Characteristics

Cited by 3 publications

References 27 publications

The Impact of Accumulating Herbage Masses in Autumn on Perennial Ryegrass Sward Characteristics

The Impact of Accumulating Herbage Masses in Autumn on Perennial Ryegrass Sward Characteristics

The Extended Effect of Top-Dressed Recovered Struvite Fertiliser on Residual Irish Grassland Soil Phosphorus Levels Compared to Commercial Phosphorus Fertiliser

Chemical, Physical, and Degradation Characteristics of Ryegrass Cultivars Grown in Autumn and Winter for Dairy Cows

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