Grassland Management With Emphasis on Nitrogen Flows

Peyraud, J. L.; Delaby, Luc

doi:10.1007/978-1-4020-5452-5_6

Cited by 9 publications

(10 citation statements)

References 32 publications

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“…Improved grassland management has the potential to reduce the total N inputs to the system in the form of N fertilizers and concentrates. The effect of lowering N fertilization and increasing SR on N‐use efficiency has been reviewed by Peyraud and Delaby (2006). They found that lowering N fertilization will reduce N surplus to a far greater extent than a decrease in SR.…”

Section: Discussionmentioning

confidence: 99%

A survey analysis of grassland dairy farming in Ireland, investigating grassland management, technology adoption and sward renewal

Creighton

Kennedy

Shalloo

et al. 2011

Grass and Forage Science

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The objective of this study was to identify and understand grassland management practices employed on dairy farms in the Republic of Ireland, including grazing-season length, concentrate-feed input, uptake of new grassland-management technologies and frequency and methods of sward renewal. The sample population for the survey was chosen from a proportionate representation of all milk suppliers taken from three of the largest dairy processors in the Republic of Ireland. The sample was subsequently broken down into three stocking rate (SR) and three size categories of milk quota (Qcat) to investigate their effects on the survey variables. Both SR and Qcat had significant effects on the proportion of participants adopting grassbased technologies and on the amount of supplementary feed offered. Grazing-season length increased from 228 d in Qcat1 to 249 d in Qcat 3 but was unaffected by SR (241 d; s.d. 3AE05). The proportion of the grazing area reseeded annually was significantly affected by SR, increasing from 0AE044 to 0AE095 of the grassland area as SR increased from SR1 to SR3, with no effect of Qcat (0AE068). The results show that on-farm grass utilization is low, with significant potential for expansion and increased efficiency through increased SRs, greater adoption of grassland-management technologies and higher levels of sward renewal.

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Section: Discussionmentioning

confidence: 99%

A survey analysis of grassland dairy farming in Ireland, investigating grassland management, technology adoption and sward renewal

Creighton

Kennedy

Shalloo

et al. 2011

Grass and Forage Science

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“…This may be achievable by optimising management aspects such as grazing management, grass utilisation (Kennedy et al, 2005;O'Donovan et al, 2002), management of all on-farm nutrient sources (Peyraud and Delaby, 2006), improved N recycling between soil, pasture, animals, and milk and livestock for export (Nielsen and Kristensen, 2005), and management of herd genetic potential (Berry et al, 2007). However, the environmental pressure per unit area under production, as indicated by N balance per hectare, may actually still increase under such a scenario.…”

Section: Economic Aspects Of Complying With the Nitrate Directivementioning

confidence: 97%

Economic impacts of nitrogen and phosphorus use efficiency on nineteen intensive grass-based dairy farms in the South of Ireland

Mihailescu

Ryan

Murphy

et al. 2015

Agricultural Systems

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“…, 1995), and much of the published work in this area relates to dairy cows (e.g. Peyraud and Delaby, 2006). In the experiment reported here, two grazing intensities were maintained on semi‐improved pastures.…”

Section: Introductionmentioning

confidence: 99%

Ingestion and excretion of nitrogen and phosphorus by beef cattle under contrasting grazing intensities

Orr

Griffith

Cook

et al. 2011

Grass and Forage Science

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There is increased global interest in the environmental impacts of farming, including the need to prevent the contamination of soil, water and air with excessive amounts of nitrogen (N) and phosphorus (P) in grazed systems. Reduction in grazing intensity has frequently been recommended to meet biodiversity and production goals in sustainable grazing systems. The objective of this experiment was to measure N and P ingestion and excretion by beef cattle grazing semi-natural pastures at two grazing intensities (Moderate or Lenient). The cattle grazing at Moderate grazing intensity had significantly more defaecations each day than those grazing at Lenient intensity (9AE5 vs. 7AE5) and tended to have more urinations (7AE0 vs. 5AE8). For the Moderate and Lenient treatments, respectively, 113 vs. 76 g N d )1 was excreted compared with 136 vs. 94 g N d )1 ingested; 12 vs. 8 g P d )1 was excreted compared with 13 vs. 10 g P d )1 ingested and urine N comprised 0AE51 and 0AE52 of the total N excreted each day. In improved, intensively managed grassland systems, urine N comprises a much higher proportion (approximately 0AE70-0AE85) of the daily total N excreted. The lower level found here is likely to impact on potential volatilization, denitrification and leaching losses, and these aspects should be examined further to see the extent to which semi-improved grasslands containing increased plant diversity compared with improved grasslands can deliver higher resource protection, as well as enhanced grassland faunal diversity and abundance.

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Grassland Management With Emphasis on Nitrogen Flows

Cited by 9 publications

References 32 publications

A survey analysis of grassland dairy farming in Ireland, investigating grassland management, technology adoption and sward renewal

A survey analysis of grassland dairy farming in Ireland, investigating grassland management, technology adoption and sward renewal

Economic impacts of nitrogen and phosphorus use efficiency on nineteen intensive grass-based dairy farms in the South of Ireland

Ingestion and excretion of nitrogen and phosphorus by beef cattle under contrasting grazing intensities

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