The economic value to dairy systems of genetic gains in the nutritive value of perennial ryegrass in grass–clover pastures
C. M. Wims A C , C. I. Ludemann A , H. Phillips A and D. F. Chapman B
+ Author Affiliations
- Author Affiliations
A DairyNZ, Private Bag 3221, Hamilton 3240, New Zealand.
B DairyNZ, c/- PO Box 85066, Lincoln University, Lincoln 7647, New Zealand.
C Corresponding author. Email: cathal.wims@dairynz.co.nz
Animal Production Science 57(7) 1357-1365 https://doi.org/10.1071/AN16487
Submitted: 25 July 2016 Accepted: 29 March 2017 Published: 10 May 2017
Abstract
Perennial ryegrass (Lolium perenne L.) breeding efforts have focussed on improving pasture nutritive value by altering flowering behaviour and increasing ploidy. However, the gains in farm profitability that this has delivered are not known. The flowering behaviour, botanical composition and nutritive value of pastures based on 24 perennial ryegrass cultivar–endophyte combinations released in New Zealand since 1970 were compared under grazing for 3 years in the Waikato region of New Zealand. Cultivars were grouped into the following three functional groups for data analysis: mid-season-heading diploids, late- and very late-heading diploids, and late- and very late-heading tetraploids. The first of these groups included older, ‘standard’ cultivars, while the latter two groups were dominated by cultivars released since 2002. The appearance of reproductive tillers in grazed pastures was delayed by 4–8 weeks for the late- and very late-heading cultivars, resulting in pastures that maintained a greater proportion of green leaf and had a greater metabolisable energy (ME) concentration during spring. Tetraploid pastures had a greater ME concentration than did diploid pastures, largely due to the greater ME concentration of the perennial ryegrass component of these pastures. The gains in pasture nutritive value achieved by broadening the range of perennial ryegrass functional types have the potential to deliver economic benefits in the range of NZ$54/ha.year (late-heading diploids compared with mid-heading diploids) to NZ$232/ha.year (tetraploids compared with mid-heading diploids) to New Zealand dairy farmers. Potential economic gains can be diminished by changes in pasture botanical composition both over time and between functional groups.
Additional keywords: grazing, Lolium perenne, pasture composition.
References
Armstrong CS (1977) ‘Grasslands Nui’ perennial ryegrass. New Zealand Journal of Experimental Agriculture 5, 381–384.| ‘Grasslands Nui’ perennial ryegrass.Crossref | GoogleScholarGoogle Scholar |
Bahmani I, Thom ER, Matthew C, Lemaire G (2002) Flowering propensity of two New Zealand perennial ryegrass cultivars originating from different ecotypes. New Zealand Journal of Agricultural Research 45, 129–137.
| Flowering propensity of two New Zealand perennial ryegrass cultivars originating from different ecotypes.Crossref | GoogleScholarGoogle Scholar |
Balocchi OA, López IF (2009) Herbage production, nutritive value and grazing preference of diploid and tetraploid perennial ryegrass cultivars (Lolium perenne L.). Chilean Journal of Agricultural Research 69, 331–339.
| Herbage production, nutritive value and grazing preference of diploid and tetraploid perennial ryegrass cultivars (Lolium perenne L.).Crossref | GoogleScholarGoogle Scholar |
Bryant J, Ogle G, Marshall P, Glassey C, Lancaster J, Garcia S, Holmes C (2010) Description and evaluation of the Farmax Dairy Pro decision support model. New Zealand Journal of Agricultural Research 53, 13–28.
| Description and evaluation of the Farmax Dairy Pro decision support model.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXktlCitLk%3D&md5=67b162c89f85d9e6e94a1d34cae1b40bCAS |
Burns GA, Gilliland TJ, Grogan D, Watson S, O’Kiely P (2013) Assessment of herbage yield and quality traits of perennial ryegrasses from a national variety evaluation scheme. The Journal of Agricultural Science 151, 331–346.
| Assessment of herbage yield and quality traits of perennial ryegrasses from a national variety evaluation scheme.Crossref | GoogleScholarGoogle Scholar |
Chapman DF, Bryant JR, McMillan WH, Khaembah EN (2012) Economic values for evaluating pasture plant traits. Proceedings of the New Zealand Grassland Association 74, 209–216.
Chapman DF, Edwards GR, Stewart AV, McEvoy M, O’Donovan M, Waghorn GC (2015) Valuing forages for genetic selection: what traits should we focus on? Animal Production Science 55, 869–882.
| Valuing forages for genetic selection: what traits should we focus on?Crossref | GoogleScholarGoogle Scholar |
Chapman DF, Bryant JR, Olayemi ME, Edwards GR, Thorrold BS, McMillan WH, Kerr GA, Judson G, Cookson T, Moorhead A, Norriss M (2017) An economically based evaluation index for perennial and short-term ryegrasses in New Zealand dairy farm systems. Grass and Forage Science 72, 1–21.
| An economically based evaluation index for perennial and short-term ryegrasses in New Zealand dairy farm systems.Crossref | GoogleScholarGoogle Scholar |
Corson D, Waghorn G, Ulyatt M, Lee J (1999) NIRS: forage analysis and livestock feeding. Proceedings of the New Zealand Grassland Association 61, 127–132.
Easton H, Stewart A, Kerr G (2011) Ryegrass in pastures – breeding for resilience. In ‘Pasture persistence symposium’. Grassland Research and Practice Series No. 15. (Ed. CF Mercer) pp. 139–148. (New Zealand Grassland Association: Hamilton, New Zealand)
Gilliland TJ, Barrett PD, Mann RL, Agnew RE, Fearon AM (2002) Canopy morphology and nutritional quality traits as potential grazing value indicators for Lolium perenne varieties. The Journal of Agricultural Science 139, 257–273.
| Canopy morphology and nutritional quality traits as potential grazing value indicators for Lolium perenne varieties.Crossref | GoogleScholarGoogle Scholar |
Hageman IW, Lantiga EA, Schlerpers H, Neuteboom JH (1993) Herbage intake, digestibility characteristics and milk production of a diploid and two tetraploid cultivars of perennial ryegrass. In ‘Proceeding of the 17th International Grassland Congress’. (Eds MJ Baker, JR Crush, LR Humphreys) pp. 459–460. (New Zealand Grassland Association: Palmerston North, New Zealand)
Lee JM, Donaghy DJ, Roche JR (2008) Effect of defoliation severity on regrowth and nutritive value of perennial ryegrass dominant swards. Agronomy Journal 100, 308–314.
| Effect of defoliation severity on regrowth and nutritive value of perennial ryegrass dominant swards.Crossref | GoogleScholarGoogle Scholar |
Lee JM, Matthew C, Thom ER, Chapman DF (2012) Perennial ryegrass breeding in New Zealand: a dairy industry perspective. Crop & Pasture Science 63, 107–127.
| Perennial ryegrass breeding in New Zealand: a dairy industry perspective.Crossref | GoogleScholarGoogle Scholar |
Ludemann CI, Eckard RJ, Cullen BR, Jacobs JL, Malcolm B, Smith KF (2015) Higher energy concentration traits in perennial ryegrass (Lolium perenne L.) may increase profitability and improve energy conversion on dairy farms. Agricultural Systems 137, 89–100.
| Higher energy concentration traits in perennial ryegrass (Lolium perenne L.) may increase profitability and improve energy conversion on dairy farms.Crossref | GoogleScholarGoogle Scholar |
McDonagh J, O’Donovan M, McEvoy M, Gilliland TJ (2016) Genetic gain in perennial ryegrass (Lolium perenne) varieties 1973 to 2013. Euphytica 212, 187–199.
| Genetic gain in perennial ryegrass (Lolium perenne) varieties 1973 to 2013.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC28XhtleqsLfP&md5=f35374249972494baa010175e1a26a73CAS |
McEvoy M, O’Donovan M, Shalloo L (2011) Development and application of an economic ranking index for perennial ryegrass cultivars. Journal of Dairy Science 94, 1627–1639.
| Development and application of an economic ranking index for perennial ryegrass cultivars.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXmvFeitLg%3D&md5=8becfe928356e3dc3e915db921c07235CAS |
Moore KJ, Moser LE, Vogel KP, Waller SS, Johnson BE, Pedersen JF (1991) Describing and quantifying growth stages of perennial forage grasses. Agronomy Journal 83, 1073–1077.
| Describing and quantifying growth stages of perennial forage grasses.Crossref | GoogleScholarGoogle Scholar |
O’Donovan M, Delaby L (2005) A comparison of perennial ryegrass cultivars differing in heading date and grass ploidy with spring calving dairy cows grazed at two different stocking rates. Animal Research 54, 337–350.
| A comparison of perennial ryegrass cultivars differing in heading date and grass ploidy with spring calving dairy cows grazed at two different stocking rates.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28XhsVI%3D&md5=da1a5b3d9441b2330c3d2152ceccbc5dCAS |
O’Donovan M, Lewis E, O’Kiely P (2011) Requirements of future grass-based ruminant production systems in Ireland. Irish Journal of Agricultural and Food Research 50, 1–21.
Roche JR, Turner LR, Lee JM, Edmeades DC, Donaghy DJ, Macdonald KA, Penno JW, Berry DP (2009) Weather, herbage quality and milk production in pastoral systems. 2. Temporal patterns and intra-relationships in herbage quality and mineral concentration parameters. Animal Production Science 49, 200–210.
| Weather, herbage quality and milk production in pastoral systems. 2. Temporal patterns and intra-relationships in herbage quality and mineral concentration parameters.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXisFSnt7w%3D&md5=fc39c6ce8b0593922348f461bfb1b195CAS |
Rossi L (2016) Interactions between pasture species and management and their implications for evaluating perennial ryegrass (Lolium perenne L.) cultivars in dairy systems. PhD Thesis, Lincoln University, Lincoln, New Zealand.
Sampoux JP, Baudouin P, Bayle B, Béguier V, Bourdon P, Chosson JF, Deneufbourg F, Galbrun C, Ghesquière M, Noël D (2011) Breeding perennial grasses for forage usage: an experimental assessment of trait changes in diploid perennial ryegrass (Lolium perenne L.) cultivars released in the last four decades. Field Crops Research 123, 117–129.
| Breeding perennial grasses for forage usage: an experimental assessment of trait changes in diploid perennial ryegrass (Lolium perenne L.) cultivars released in the last four decades.Crossref | GoogleScholarGoogle Scholar |
Stewart AV (2006) ‘Genetic origins of perennial ryegrass (Lolium perenne) for New Zealand pastures. In ‘Proceedings of the 13th Australasian plant breeding conference. Breeding for success: diversity in action’. (Ed. CF Mercer) pp. 11–20. (New Zealand Grassland Association: Christchurch, New Zealand)
Terry RA, Tilley JMA (1964) The digestibility of the leaves and stems of perennial ryegrass, cocksfoot, timothy, tall fescue, lucerne and sainfoin, as measured by an in vitro procedure. Grass and Forage Science 19, 363–372.
Stewart AV, Hayes R (2011) Ryegrass breeding-balancing trait priorities. Irish Journal of Agricultural and Food Research 50, 31–46.
Waghorn G (2007) What is dietary metabolisable energy? Proceedings of the New Zealand Grassland Association 69, 153–159.
Waghorn GC, Burke JL, Kolver ES (2007) Principles of feeding value. In ‘Pasture and supplements for grazing animals. Occasional publication no. 14’. (Eds PV Rattray, IM Brookes, AM Nicol) pp. 35–60. (The New Zealand Society of Animal Production: Hamilton, New Zealand)
Wilkins P, Lovatt J (2011) Gains in dry matter yield and herbage quality from breeding perennial ryegrass. Irish Journal of Agricultural and Food Research 50, 23–30.
Wims CM, McEvoy M, Delaby L, Boland TM, O’Donovan M (2013) Effect of perennial ryegrass (Lolium perenne L.) cultivars on the milk yield of grazing dairy cows. Animal 7, 410–421.
| Effect of perennial ryegrass (Lolium perenne L.) cultivars on the milk yield of grazing dairy cows.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BC3s%2FitlSqtA%3D%3D&md5=4d7c184ecb9308bbc349e0de4a3f04e8CAS |
Wims CM, Lee JM, Rossi L, Chapman DF (2014) Variation in the reproductive development of perennial ryegrass (Lolium perenne) cultivars. Proceedings of the New Zealand Grassland Association 76, 189–192.
