The value of grass. Dr Mary McEvoy Germinal Ireland, Horse & Jockey, Thurles, Co. Tipperary Presentation 00/00/2014
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1 The value of grass Dr Mary McEvoy Germinal Ireland, Horse & Jockey, Thurles, Co. Tipperary Presentation 00/00/
2 Sourcing information on varieties DAFM Recommended List Simulated grazing 8-10 cuts General purpose 6 cuts 2 silage harvests Teagasc Pasture Profit Index Ranks varieties on monetary terms
3 Teagasc Pasture Profit Index Teagasc/ DAFM collaboration Total merit index to assist in variety selection Quantifies economic value of each trait Assigns economic value to cultivar performance Determine Total Economic Merit of each variety in per ha/year Published with 2015 DAFM Irish Recommended List
4 Teagasc Pasture Profit Index (PPI) 2015 Uses simulated grazing data from DAFM trials Most varieties have 2 sowing years and 2 harvest years Limited data on 11 varieties * indicates only one sowing year (2 harvest years) 3 varieties have no PPI value
5 PPI Sub Indices Variety Details DM Yield PPI Details Quality Silage Persistency Variety Ploidy Heading Date Spring Summer Autumn Total /ha per year Abergain T 05-Jun Dunluce T 30-May AberChoice D 10-Jun Abermagic D 30-May Kintyre T 08-Jun Rosetta* D 24-May Astonenergy T 02-Jun Seagoe* T 29-May AberPlentiful* T 08-Jun Magician T 22-May Giant T 20-May Trend T 24-May Navan T 06-Jun Aspect* T 05-Jun Carraig T 24-May Solomon D 23-May Drumbo D 07-Jun Delphin T 02-Jun AberCraigs T 04-Jun Glenroyal* D 05-Jun Majestic* D 02-Jun Boyne* D 22-May Glenveagh* D 03-Jun Twymax* T 07-Jun Stefani* D 01-Jun Piccadilly* D 03-Jun Tyrella D 04-Jun Mezquita D 06-Jun Solas T 10-Jun Rodrigo D 27-May Clanrye D 06-Jun
6 The Value of Extra Grass in the Diet Grazed Grass Grass Silage Concentrate Cost c/kg DM Relative Cost Replace 1 kg Concentrate with 1 kg Grazed Grass 210 days at grass 1 cow = = 42 Each extra day at grass is worth 1.54 per suckler cow per day Each additional t DM/ha utilised will increase net profit by 160 per ha Net profit ( /ha) Estimated Grass utilisation (kg DM/ha)
7 Extra grass in spring Earlier turnout to grass Increased milk protein Increased milk yield Reduced feed costs Each additional day at grass = 2.70 per cow per day 100 cows x 2.70 = 270 per extra day = 1890 per week PPI difference= 108/ha per year in spring growth
8 Extra grass in autumn Extend the grazing season in autumn Reduced feed costs Increased animal performance Each additional day at grass = 2.10 per cow per day 100 cows x 2.10 = 210 per extra day = 1470 per week PPI difference= 60/ha per year in autumn growth
9 Autumn per ha/year Extra Grass in Spring and Autumn - PPI 80 Abermagic Kintyre Dunluce Navan AberChoice AberPlentiful* Glenroyal* Abergain Astonenergy Seagoe* Majestic* Drumbo Giant Carraig Delphin Trend Aspect* Glenveagh* Stefani* Boyne* Magician Solomon Rosetta* 20 Twymax* AberCraigs Mezquita Piccadilly* Tyrella Spring per ha/year
10 The value of Quality 1% increase in DMD% = 5% increase in animal performance What is the impact of this in real terms? RL Contol Mean (Late PRG) E.g. A cow produces 25 l/day on control sward On 84.4% DMD grass, she will potentially yield 27 l/day 2 l/cow/day = 0.60c per cow/d x 100 cows = 60 per day 30 days = 1800 for 100 cow herd AberGain DMD% Difference in DMD +1.7% Difference in animal performance +8.5%
11 The effects of silage digestibility on concentrate feed required (kg) to maintain animal performance Additional concentrate requirement for a 5-unit reduction in DMD Finishing cattle Kg per day 1.9 Lambs Kg per day kg/ 150 d finishing period 25 kg/ 70 d Finishing period Pregnant ewes Kg in late pregnancy 22.6
12 Boyne* Carraig Glenveagh* Solomon Piccadilly* Mezquita Majestic* Tyrella Rosetta* Giant Glenroyal* Magician Stefani* Quality per ha/year Trend Solas Rodrigo Clanrye Drumbo Dunluce AberPlentiful* Aspect* Twymax* Kintyre Abermagic Navan AberCraigs Seagoe* Delphin Abergain AberChoice Astonenergy The difference is quality - PPI Mean DMD Difference is 4.4% = 114 on PPI
13 Quality PPI value /ha per year PPI comparing spring and quality Spring v Quality PPI comparison 60 Astonenergy AberChoice Abergain Twymax* AberPlentiful* Navan AberCraigs Delphin Drumbo Aspect* Kintyre Seagoe* Dunluce Abermagic 0 Trend Glenroyal* Giant Stefani* Glenveagh* Tyrella Magician Rosetta* -20 Mezquita Carraig Piccadilly* Majestic* Solomon -40 Boyne* Spring PPI value /ha per year
14 Total DM Yield ( j/ha per year: spring+summer+autumn) PPI Comparing DM Yield (spring + summer + autumn) and Quality Rosetta* Abermagic Solomon Magician Dunluce Abergain Boyne* Majestic* Glenveagh* Piccadilly* Giant Carraig Glenroyal* Tyrella Stefani* Trend Kintyre Seagoe* AberPlentiful* Navan Aspect* Drumbo Delphin AberChoice Astonenergy 70 Mezquita AberCraigs 60 Twymax* Quality ( /ha per year)
15 Persistency 2% of grassland is reseeded annually Important trait Pasture Profit Index 0 is considered a persistent variety Less persistent varieties have a negative value associated with them Smaller difference than in other traits PPI difference= 28/ha per year Sward density (Ground Score) Used to quantify persistency Related to GS change High GS varieties may be difficult to graze?
16 Soil fertility Critical to establishment, performance and persistency Soil test: ph, P and K Target ph: ph mineral soils ph 5.5 peat soils Max lime application of 3 t/ac Target P and K Index 3 90% of swards are below target Get a soil fertility plan in place Maintain targets once they re achieved
17 Clanrye* D 06-Jun Late Diploids PPI 2015 PPI Sub Indices Variety Details DM Yield PPI Details Quality Silage Persistency Variety Ploidy Heading Date Spring Summer Autumn Total /ha per year AberChoice D 10-Jun Drumbo D 07-Jun Glenroyal* D 05-Jun Majestic* D 02-Jun Glenveagh* D 03-Jun Stefani* D 01-Jun Piccadilly* D 03-Jun Tyrella D 04-Jun Mezquita D 06-Jun
18 Late Tetraploids PPI 2015 PPI Sub Indices Variety Details DM Yield PPI Details Quality Silage Persistency Variety Ploidy Heading Date Spring Summer Autumn Total /ha per year Abergain T 05-Jun Kintyre T 08-Jun Astonenergy T 02-Jun AberPlentiful* T 08-Jun Navan T 06-Jun Aspect* T 05-Jun Delphin T 02-Jun AberCraigs T 04-Jun Twymax* T 07-Jun Solas* T 10-Jun
19 Rodrigo* D 27-May Intermediate diploids PPI 2015 PPI Sub Indices Variety Details DM Yield PPI Details Quality Silage Persistency Variety Ploidy Heading Date Spring Summer Autumn Total /ha per year Abermagic D 30-May Rosetta* D 24-May Solomon D 23-May Boyne* D 22-May
20 Intermediate tetraploids PPI 2015 PPI Sub Indices Variety Details DM Yield PPI Details Quality Silage Persistency Variety Ploidy Heading Date Spring Summer Autumn Total /ha per year Dunluce T 30-May Seagoe* T 29-May Magician T 22-May Giant T 20-May Trend T 24-May Carraig T 24-May
21 Germinal varieties AberGain 1st AberChoice 3rd Dunluce 2nd AberMagic Kintyre 5th Drumbo Navan Tyrella Seagoe Clanrye
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