Manipulation Of Perennial Ryegrass With The Plant Growth Regulator Mefluidide,
2024
Lincoln University
Manipulation Of Perennial Ryegrass With The Plant Growth Regulator Mefluidide, M H. Foreman, R J. Field
IGC Proceedings (1977-2023)
In an attempt to increase the nutritive quality of herbage, the plant growth regulator mefluidide was applied at low rates (0.15-0.30 kg ai/ha) to pure stands of perennial ryegrass (Lolium perenne L.) in early spring. There was a reduction in total dry matter production of 35.8% at 0.3 kg ai/ha, but because reproductive development was significantly reduced there was a useful increase in the green leaf harvest component from 1.3% to 41.6% of total dry matter. High yields of green leaf were maintained for 100 days, in contrast to untreated swards which were composed largely of stem plus inflorescence …
Interaction Among Harvest Frequency, Fertilizer And Herbicide Use With Intensively Managed Alfalfa In The North-Central Usa,
2024
Michigan State University
Interaction Among Harvest Frequency, Fertilizer And Herbicide Use With Intensively Managed Alfalfa In The North-Central Usa, O B. Hesterman, J J. Kells, P L. Tiffin
IGC Proceedings (1977-2023)
This research evaluated effects of 2 alfalfa (Medicago sativa L,) cultivars (winter hardy and moderately winter hardy), 3 levels of fertiliser (none, medium, high), 3 levels of herbicide (none, medium, high), and 2 harvest systems ( 4 harvests and 5 harvests per year) on forage yield and quality, Five years (1987-1991) of an experiment in Michigan, USA, have been completed. During the first production year (1988). forage dry matter (DM) production was similar for the 5-harvest (15.2 Mg/ha) and the 4-harvest system (14.8 Mg/ha), During subsequent years, DM production was greater in the 4-harvest than in the 5-harvest system …
Seasonal Changes Of Daily Increase In Extended Sward Height, Dry Matter, Bulk Densities And Digestible Dry Matter Of Temperature Grasses,
2024
Iwate University
Seasonal Changes Of Daily Increase In Extended Sward Height, Dry Matter, Bulk Densities And Digestible Dry Matter Of Temperature Grasses, K Watanabe, K Kita, S Saiga
IGC Proceedings (1977-2023)
Under a regime of frequent cutting, seasonal changes of the daily increase in extended sward height, dry matter (OM) bulk densities and digestible dry matter (DOM) of perennial ryegrass (Lolium perenne L.), orchardgrass (Dactylis glomerata L.) and Kentucky bluegrass (Poa pratensis L.) were followed for 5 years. Seasonal changes of the daily increase in extended sward height, DM bulk densities (daily increase in OM/daily increase in extended sward height) and DOM (daily increase in DOM/daily increase in extended sward height) of the grasses had 3 peaks and 2 troughs, as the height and densities were depressed …
Effects Of Applied Nitrogen And Rest Period On Forage Production And Silage Quality,
2024
INIA
Effects Of Applied Nitrogen And Rest Period On Forage Production And Silage Quality, L Juan Carlos Dumont, A Francisco Lanuza
IGC Proceedings (1977-2023)
An experiment to analyse the effect of nitrogen (N) fertiliser and rest period initiation for silage making on permanent pasture was carried out. N fertiliser increased forage production, crude protein, neutral detergent fibre and ammonia-N. Shortening the intervals, by delaying the initiation of resting period, increased forage quality with only marginal decreases in dry matter (DM) production. Resting periods from the second week of September and cutting at the end of October or first week of November was appropriate in the Osorno area of Chile. The use of 60 kg N/ha is recommended. Two-cutting system must be considered in order …
Long-Term Management Of Vulpia In Pastures,
2024
NSW Agriculture
Long-Term Management Of Vulpia In Pastures, A R. Leys, P M. Dowling, B Plater, M I. Smetham
IGC Proceedings (1977-2023)
Vulpia (Vulpia spp.) is a common weed of subterranean clover (Trifolium subterraneum L.)-based pastures throughout southern Australia, where it reduces productivity, contaminate's wool and injures livestock. Winter-cleaning pastures with simazine, and to a lesser extent spraying paraquat in spring to sterilise seed, gives good short-term control; however, vulpia produces large amounts of seed and can re-invade even dense subterraneum clover pastures. Reinvasion is least in pastures containing a companion grass. An integrated management system utilising grass in mixture with subterranean clover, livestock and the judicious use of herbicides, will be required to keep the vulpia content of pastures …
Vertical Distribution Of Botanical Components In Four Pastures Mixtures Grazed Solely By Goats,
2024
Lincoln University
Vertical Distribution Of Botanical Components In Four Pastures Mixtures Grazed Solely By Goats, M J. Casey, R J. Lucas, D R. Stevens
IGC Proceedings (1977-2023)
Four different grasses (perennial ryegrass (Lolium perenne L.), prairie grass (Bromus willdenowii Kunth), cocksfoot (Dactylis glomerata L.) and timothy (Phelum pratense L.)) sown with white clover (Trifolium perenne L.) were evaluated under rotational goat grazing lo 10 cm in a cool temperate environment. Detailed measurements of the composition of vertical sward horizons, In spring, summer and autumn, showed significant differences in sward structure between pasture miX:tures. Prairie grass and cocksfoot swards were the tallest (>25 cm) in spring with the top of the sward dominated by grass leaf. The prairie grass sward was also taller …
Effects Of Grazing Management On Grass Tiller Density Characteristics Of Ryegrass-White Clover Dairy Pasture,
2024
Dairying Research Corporation
Effects Of Grazing Management On Grass Tiller Density Characteristics Of Ryegrass-White Clover Dairy Pasture, E R. Thom, A M. Bryant
IGC Proceedings (1977-2023)
The characteristics of pastures receiving different systems of grazing management during September-May were examined over 3 years from September 1989. Three farmlets (each 10 0.8-ha areas) represented (i) rotational grazing every 30 days (September-May) (RG), (ii) fast rotations during spring (September-November) (SFR) and (iii) fast rotations during spring, summer and autumn (SeptemberMay) (SSFR). Pastures were predominantly perennial ryegrass (Lolium perenne L.) and white clover (Trlfolium repens L.) grazed by dairy cows. Large increases in grass tiller density occurred in SFR and SSFR areas after the first year compared with the rotationally grazed pastures, which have been maintained throughout …
Nitrogen Effects Of Barnyard Manure Applied On Andosol Grasslands In Eastern Hokkaido,
2024
Hokkaido Perfectural Kosen Agricultural Experiment Station
Nitrogen Effects Of Barnyard Manure Applied On Andosol Grasslands In Eastern Hokkaido, T Saigusa, M Noshiro
IGC Proceedings (1977-2023)
Annual changes in the nitrogen (N) effects of barnyard manure (BM) were estimated on grassland of eastern Hokkaido, Japan. In pure' timothy (Phleum pratense L.) grasslands, they were as follows: in the first year after renovation, BM, when ploughed under, supplied an estimated 1 kg Nit manure; this value decreased to 0.5 kg Nit, and 0.3 kg Nit in the second and third year, respectively. When topdressed, BM supplied an estimated 1 kg Nit in the first year, and 0.5 kg Nit in the second year. In timothy-legume mixture, the amount of N supplied by BM to pure timothy …
Growth Kinetics Of Digitaria Decumbens After Defoliation By Cattle At Two Grazing Pressures,
2024
INRA
Growth Kinetics Of Digitaria Decumbens After Defoliation By Cattle At Two Grazing Pressures, M Naves, P Cruz, A Malafosse, J P. Manteaux
IGC Proceedings (1977-2023)
Two regrowth cycles of an intensively managed Digitaria decumbens stand were studied. One followed high-stocked grazing by cows and their calves, and the other followed regrowth grazing by cows only. after weaning: Biomass, morphological composition, leaf area index and nitrogen were measured on 7 occasions between days O and 27 of growth. Residual biomass after the low grazing pressure (2403 kg DM/ha) was 4 times higher than after the high grazing pressure (633 kg DM/ha), mainly because more stems remained at the low grazing pressure (1220 kg DM/ha vs. 230 kg DM/ha). At both grazing pressures, growth of leaf and …
Productivity And Persistency Of Bromus Wildenowii Kunth Cv. Grasslands Matua In Japan,
2024
National Grasslands Research Institute
Productivity And Persistency Of Bromus Wildenowii Kunth Cv. Grasslands Matua In Japan, T Kanno, M Fukuyama, S Sato
IGC Proceedings (1977-2023)
The study was conducted to evaluate herbage productivity, persistency and suitable management of prairie grass (Bromus willdenowll Kunth cv. Grasslands Matua) in Japan. Dry matter (DM) yields of S temperate grasses including prairie grass were compared. Pield plots were cut every month for 3 years. Annual DM yield of prairie grass was the highest in each year, but prairie grass was less persistent than the remaining grasses. In a grazing experiment, however, 1he seedlings of prairie grass appeared in flushes in autumn, and these ensured the persistency of prairie grass pasture, Under a forage conservation plus grazing regime, …
Forage Quality And Steer Performance On Tifton 78 And Coastal Bermudagrass Pastures,
2024
University of Georgia
Forage Quality And Steer Performance On Tifton 78 And Coastal Bermudagrass Pastures, G M. Hill, G W. Burton, P R. Utley
IGC Proceedings (1977-2023)
orage quality and weight gains were measured during a 3-year experimenl in which yearling sleers grazed replicated 0.81-ha paslures of Tiflon 78 (T), a Tiflon 44 x Callie Fl hybrid, or Coastal (C) bermudagrass (Cynodon dactylon [L.) Pers.). During 168-day grazing seasons, stocking rales were Increased as forage availability increased in spring and early summer resulting in mean slocking rales of 5.0 and 7.3 steers/ha, respectively, for C and T. Pastures were sampled al 28-day inlervals and in vitro dry matter disappearance (IVDMD) of available forage declined (P<0.01) for each bermudagrass with time, but seasonal mean IVDMD was higher (P<0.05) for T than C (T=57.4, C=56.5%). Steer average daily gains (ADO) were 15% higher (P<0.05) on T than on C pastures (C=0.59, T-0.68 kg), and gain/ha was 38.1%higher (P<0.01) for T than C (C=7l3, T=985 kg/ha). Superiority of Tifton 78 compared with Coastal has been verified in additional grazing experiments.
Use Of Irrigated Lucerne At Different Growth Stages. I. Evaluation Under Cutting,
2024
INIA
Use Of Irrigated Lucerne At Different Growth Stages. I. Evaluation Under Cutting, Patrucio O. Soto, E B. Jahn
IGC Proceedings (1977-2023)
Lucerne (Medicago sativa) cv. Huinca with medium winter dormancy was used to evaluate different cutting sequences. Treatments were: prebud (PB), bud (B), 10% flower (lOPP), SO% 0ower (SOPP) and combinations of these, giving 12 treatments in total. Lucerne was 3 years old at the beginning of the trial. A complete block design with 4 replicates and 2 x 6 m plots was used. Cuts were made at a height of SO mm. During the S seasons the cutting sequence B-I0PP had the highest yields (lS-19 t DM/ha) and was significantly higher (P<0.0S) than always cutting at B stage. B-IOPP was similar (P<0.0S) to I0PF, Plant density decreased from 65 to 25 plants/m1 for treatments cut at B. Percentage crude protein varied from IS.3 to 20.4% and acid detergent fibre ranged from 34.8 to 40.5%.
Pasture Productivity Of Different Species Evaluated Under Grazing In The Central Valley Of Chile,
2024
INIA
Pasture Productivity Of Different Species Evaluated Under Grazing In The Central Valley Of Chile, Patricio Soto, E Jahn, H Acuna, C Ovalle
IGC Proceedings (1977-2023)
Seven irrigated mixtures growing on volcanic ash soil were evaluated during 8 years. Five mixtures of white clover (Trifolium repens) (WC) with: ( I) ryegrass (Lolium perenne) (WC-R), (2) fescue (Festuca arundinacea) (WC-F), (3) orchardgrass (Dacrylis glomerara) (WCO), (4) orchardgrass-ryegrass (WC-O-R), (S) red clover-ryegrass (Trifolilun pratense) (WC-RC-R), (6) lucerne alone (Medicago saliva) (L), and lucerne-orchardgrass (L-0). Plots were 300 m2 in a complete block design with 3 replicates, grazed individually according to growth at 1S0-200 mm height for treatments with WC and 10% bloom for L. Pasture availability and ungrazed …
Change In Botanical Composition, Dry Matter Yield And Forage Quality Of Grassland After Five Seasons Of Extensification,
2024
Universitdt Bonn
Change In Botanical Composition, Dry Matter Yield And Forage Quality Of Grassland After Five Seasons Of Extensification, W Kuhbauch, J Schellberg
IGC Proceedings (1977-2023)
Extensification of grassland management in Germany has 2 major objectives (I) to reduce the surplus of crop and animal products, and (2) to diminish unwanted side effects against the environment from intensive production systems. Some of the programmes on offer require a reduced number of cuttings and grazings per season, including a very late first cut of the sward and a reduction of nitrogen fertiliser. In a 5-yenr experiment at the grassland research station Rengen, Eifel-mountain-range, Germany, extensification of this type on productive grassland sites created an unbalanced botanical composition and, with nitrogen applied, a major portion of quackgrass in …
Initial Growth And Herbage Quality Trends For Leaves And Stems Of Two Forage Sorghums,
2024
Texas Tech University
Initial Growth And Herbage Quality Trends For Leaves And Stems Of Two Forage Sorghums, A G. Matches, T P. Karnezos, J W. Keeling
IGC Proceedings (1977-2023)
Forage sorghums (Sorghum bicolor (L.) Moench) are commonly grown on the southern Great Plains of the USA as pasture, hay or emergency feed. Grazing and harvesting schedules generally span a wide range of plant maturities, Therefore, we measured at weekly intervals (from 32 to 96 days after planting) the herbage yield and quality of leaves and stems for Trudan 8 (hybrid sudangrass) and Funk-G 1990 (FG- 1990) (hybrid forage sorghum), Replicated plantings were grown under irrigation at Lubbock, Texas in 1990 and 1991. Trudan 8 generally had a lower propo1tion of leaves, leaf yield/plant, digestibility and crude protein levels …
Effects Of Nitrogen And Potassium Fertilizers On Forage Yield And Quality Of Dwarf Napiergrass,
2024
Taiwan Livestock Research Institute
Effects Of Nitrogen And Potassium Fertilizers On Forage Yield And Quality Of Dwarf Napiergrass, F H. Hsu, K Y. Hong
IGC Proceedings (1977-2023)
The experiment was conducted to determine effects of nitrogen and potassium fertilisers on forage yield and quality of dwarf napiergrass (Pennisteum purpuretum). Four levels of N (460, 690, 920 and 1150 kg/ha), and 4 levels of K2O (150, 300, 450 and 600 kg/ha), and 1 level of P2O5 (144 kg/ha), were applied. Forage yield, leaf area per tiller, leaf elongation rate and forage quality of dwarf napiergrass were increased when N level applied was increased. Leaf growth, tiller number and forage yield were not affected by K applied. However, Ca and Mg contents in plant were reduced and …
Effect Of Stocking Rate On Rhodes Grass-Stylo Pasture In The Northern Guinea Savanna Zone Of Nigeria 1. Herbage Yield, O S. Onifade, I F. Adu, J O. Akinola
IGC Proceedings (1977-2023)
The potential herbage production of Rhodes grass (Chloris gayana cv. Callide)•stylo (Stylosanthes gulanensis cv. Cook) pasture was assessed during S (late wet to dry season) periods at Shika, Nigeria. The pasture received 200 kg N and 30 kg P/ha during the first (198S- 1986) and fifth (1989-1990) grazing periods (GP). Some P only was applied in other periods. The stocking rates (SR) were 12, 18, 24, 30 and 36 Yankasa sheep/ha while the duration of grazing varied from 1S4 to 210 days. Sty lo, with production below 1.0 Vha, was eliminated in the first year of utilisation, …
Efficiency Of Different Implements For Pasture Interseeding,
2024
INTA
Efficiency Of Different Implements For Pasture Interseeding, J A. Josifovich
IGC Proceedings (1977-2023)
Pasture renovation with grasses and legumes appears to be a good practice to increase primary and secondary production. Trials were planted in 6 locations in Buenos Aires province, Argentina, 2 in Pergamino and 4 200 and 300 km south east of Pergamino, to evaluate 3 different implement combinations: a) rigid chisel coulter, b) spring tooth heavy duty coulter, with teeth 30 cm apart followed by spring tooth cultivators, and c) spring tooth heavy duty coulter 30 cm used twice in the same direction. The species sown were: fescue (Festuca arundinacea Schreb.), brome (Bromus uniolides H.B.K.), chicory (Cichoriu, intybus …
Effect Of Artificial Drought On Sward Tiller Density In Lolium And Festuca,
2024
University College of Wales
Effect Of Artificial Drought On Sward Tiller Density In Lolium And Festuca, Y Gao, D Wilman
IGC Proceedings (1977-2023)
Eight grasses, grown in field swards, were compared in four replicates on each of two adjacent sites. One site received normal rainfall; the other site was protected from rain by plot covers of clear polythene from June 1990 (the year after sowing) to October 1991. All plots were cut every 5 weeks from March to October. The numbers of tillers of the sown species per 0.1 m2 were recorded on all plots four times in the period September- December 1990 and four times in the period March-October 1991. The drought conditions created by the covers reduced the numbers of tillers …
Influence Of Spring Grazing Management On Summer Autumn Production Of Dairy Pastures,
2024
Massey University
Influence Of Spring Grazing Management On Summer Autumn Production Of Dairy Pastures, S C. Da Silva, C Matthew, P.N P. Matthews, J Hodgson
IGC Proceedings (1977-2023)
Three grazing treatments were allocated at random within e11ch of five 2.6 ha paddocks of perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.) pasture. The treatments involved variation i'n the timing and degree of control of ryegrass reproductive growlh in two successive pasture growth seasons (1990-91 and 1991- 92). In 1990-91, swards in which reproductive growth was controlled at anthesis (20 November; LHC) produced 4330 kg OM/ha between 18 December and 11 April, compared with 3980 kg DM/ha for swards controlled on 18 December (VLHC) and 3210 kg OM/ha for swards controlled on 9 October …
