The benefits of sward renewal

Philip Creightonl, Michael ODonovan2 and Laurence Sha11002 Grassland Science Research division Animal Grassland Research and Innovation Centre Teagasc Athenry and Moorepark2 Introduction Grassland in Ireland including pettish grazing accounts for all over 90% of agricultural land use. Lolium perenne (Perennial rye polecat) is by far the most widely sown hit species accounting for over 95% of forage grass seed sold each year. It produces a dense sward, advancedly acceptable to livestock with the ability to produce high dry atter yields, especially in spring and autumn reducing the seasonality of production.Achieving goodly performance from grass is dependent on having high quality interminable ryegrass/clover swards. This paper will outline the important aspects of reseeding pasture, whats hap at evoke level, why and when reseeding should be finish, its benefits and costs. What is happening at farm level? A recent survey of a proportion of chicken coop suppliers from Ker ry, Connaught Gold and Glanbia (Creighton et al. , 2011) found a number of significant findings from a eseeding perspective, these are listed below. i. v. x.Regular reseeding took place on 50% of participants farms, 25% reseed infrequently, 25% never reseed. Of those reseeding, 50% of participants reseed 2-4ha/year, 20% 8. 0 Soil K major power 2 3 4 Soil K ranges (mg/ 0-50 51-100 101-150 > 150 K application rate (kg/ha) 110 75 50 Slurry is a good option to maintain nutrient status. With the increased cost of compounds (P and K) slurry should be use in reseeding, 1000 gallons of slurry at 7% DM is equivalent to 4kg N, 3kg P and 19. 5kg K. At soil index 3, slurry (3000gals/ac) is sufficient to supply the P and K nutrients.Weed control The best time to control docks and all other weeds is after reseeding. By using a post exit spraying seedling weeds can be destroyed in the freshman place they properly give out and establish root stocks. Established weeds can seriously deoxid ize the yield potential and economic lifetime of the reseeded sward. From the survey information it is web that only 50% of farmers are applying a post emergence spray, resulting in over 90% of surveyed farms having problems with dock infestations.To ensure that a post emergence spray can be applied reseeding should be targeted for the spring or early autumn when establishment conditions are much more adequate and the opportunity for weed control is guaranteed. The post emergence spray should be applied approximately 6 weeks after establishment Just before the first grazing takes place. With weed control it pays to be proactive, spraying when grass is at the two leaf stage works well. skimming anxiety of reseeded swards Care needs to be taken when grazing newly reseeded swards.The sward should be razed as soon as the new grass plants roots are strong enough to withstand grazing (root remain anchored in the ground when pulled). Early grazing is important to allow high spirits t o the base of the plant to encourage tillering. Light grazing by animals such(prenominal) as calves, weanlings or sheep is preferred as ground conditions may suave be somewhat fragile depending on establishment method used. Grazing new reseeds with larger animals can create high levels of tiller pulling. The first grazing of a new reseed can be completed at pre grazing yields of 600-1000kg DM/ha. Frequent grazing of the reseeds at frolicsome covers (