Development And Fate Of Seedlings Of Three Temperate Legumes Following Oversowing,
2024
Northern Resource Management Project, Pakistan
Development And Fate Of Seedlings Of Three Temperate Legumes Following Oversowing, M H. Awan, P D. Kemp, D J. Barker, M A. Choudhary
IGC Proceedings (1977-2023)
Oversown seeds of subterranean clover (Trifolium subterraneum L.), strawberry clover (T. fragiferum L.) and caucasian clover (T. ambiguum Bieb.) were monitored for 40 days to identify the stage of development at which the seed of these temperate pasture legumes failed at varying moisture levels. Intact sods of glyphosate-sprayed pasture were taken to a glasshouse, subjected to factorial combination of three soil surface moisture levels (low, medium, high) and three legume species. Overall, 70, 52 and 31% of seed of subterranean, strawberry and caucasian clovers,respectively, produced a visible radicle or seedling. The greatest loss of potential seedlings occured following …
Effects Of Nitrogen Fertilizer On The Growth Of Ryegrass With Different Tolerances To Pulling,
2024
Dairying Research Corporation, NZ
Effects Of Nitrogen Fertilizer On The Growth Of Ryegrass With Different Tolerances To Pulling, E R. Thom, V T. Van Vught, R J. Mccabe, C D. Waugh, B.J L. Koch, H L. Lagoda
IGC Proceedings (1977-2023)
Plots of high endophyte pipeline ryegrass (Lolium perenne L.) lines, coded A1 and A3, were established on the Dairying Research Corporation No 2 Dairy in May, 1994. Three plots of each line were drilled on a silt loam and three on a peaty silt loam soil. Half the area of each plot received nitrogen (N) fertiliser (30 kg N/ha) following grazings from September, 1995 to February, 1996. Line A1 consistently pulled more than did A3 and pulling was worse on the peat. N fertiliser increased post-flowering tillering especially for A1. Line A1 had a higher leaf shear strength (6.21 …
Principles Of Tree Management In The Grazing Lands Of Queensland, Australia,
2024
Department of Natural Resources, Australia
Principles Of Tree Management In The Grazing Lands Of Queensland, Australia, J C. Scanlan, E J. Turner
IGC Proceedings (1977-2023)
The key factors that influenced the appropriateness of clearing were identified for Queensland. The first stage was to identify endangered and vulnerable vegetation types, with final agreement being that clearing would not be undertaken in these regional ecosystem types. For other regional ecosystems, the degree of clearing that was appropriate was determined from the original and current extent of that ecosystem type, the sustainability of any development and any off-site effects of clearing. The maximum slope suitable for clearing, the width of riparian buffers and other corridors were also determined. These local guidelines for tree clearing became a central part …
Influence Of Five Cutting Frequencies On The Production Of Medicago Sativa Cultivars In The Boland Of South Africa,
2024
EADI, South Africa
Influence Of Five Cutting Frequencies On The Production Of Medicago Sativa Cultivars In The Boland Of South Africa, T Oberholzer, J M. Van Heerden
IGC Proceedings (1977-2023)
The use of fixed interval cutting management for lucerne was studied for four cultivars (CUF101, Condor, SA Standard and Alfagraze) of four dormancy classes. Five fixed cutting intervals ranging from two to ten weeks were imposed for three years on irrigated stands at Elsenburg Research Station in the Boland of South Africa. The experimental design was a 4 by 5 split-plot randomised block with three replications. The four main plots were four cultivars split into five subplots containing five cutting treatments. The more winter dormant cultivar, Alfagraze, was least sensitive to cutting frequency and relatively more productive than the other …
Tiller Dynamic Of Dwarf Elephantgrass (Pennisetum Purpureum Cv. Mott) Under Defoliation,
2024
Universidad del Zulia
Tiller Dynamic Of Dwarf Elephantgrass (Pennisetum Purpureum Cv. Mott) Under Defoliation, T Clavero
IGC Proceedings (1977-2023)
A field study was conducted at the Animal Production Research Center of the University of Zulia, Venezuela. The objective of this experiment was to evaluate the tiller dynamic of dwarf elephantgrass (Pennisetum purpureum cv. Mott) under three cutting frequencies (CF) 28, 42 and 56 days and three cutting heights (CH) 10, 20 and 40 cm in order to estimate basal (BT), aerial (AT) and dead tillers (DT). The experiment was laid out as a split-plot trial with three replications. The number of basal tillers increased as CF was shortened and CH was increased. The intensity of defoliation independent of CF …
Animal Productivity And Dynamics Of Native Pastures Improved With Oversown Legumes In Uruguay,
2024
INIA
Animal Productivity And Dynamics Of Native Pastures Improved With Oversown Legumes In Uruguay, D F. Risso, E J. Berretta
IGC Proceedings (1977-2023)
Natural pastures in large areas of Uruguay can be improved by fertilization with phosphorus (P) and surface sowing of adapted legumes, promoting an increased forage production and quality, with the consequent higher carrying capacity and better animal performance. A study was conducted to evaluate two improved grasslands with two stocking rates under rotational grazing. Such improvements resulted from the oversowing of: 1) white clover (Trifolium repens) plus birdsfoot trefoil (Lotus corniculatus); and 2) annual lotus (Lotus subbiflorus). In these pastures, with important presence of legumes, a higher frequency of C3 and winter species, high levels …
Emergence Of Small And Large Seeded Grasses: Importance Of Shoot Strength,
2024
University of Sunderland
Emergence Of Small And Large Seeded Grasses: Importance Of Shoot Strength, M Andrews, M E. Andrews, C Watson, S M. Percival
IGC Proceedings (1977-2023)
Inter-specific relationships between mean seed weight (MSW), coleoptile and mesocotyl length and width, shoot strength and emergence from 15 mm sowing depth were examined for six temperate pasture grass species ranging in MSW from 0.34 - 10.4 mg. For all species, coleoptile + mesocotyl length was greater for emerged than non-emerged seedlings. Across species, emergence % was not significantly correlated with coleoptile + mesocotyl length but it was significantly correlated with mean seed weight and coleoptile and mesocotyl width. Shoot strength increased with increased coleoptile width. It is proposed that decreased emergence % with decreased seed weight across species at …
Yield And Quality Of Cereal And Cereal-Pea Companion Crops And Their Effect On Alfalfa Establishment,
2024
New Liskeard Agricultural Research Station
Yield And Quality Of Cereal And Cereal-Pea Companion Crops And Their Effect On Alfalfa Establishment, J E. Johnston
IGC Proceedings (1977-2023)
This study was carried out to determine the effect of management practices (harvest maturity, cereal species, mixtures with field peas (Pisum sativum)) on the yield and quality of cereal companion crops harvested for forage and the impact of those practices on subsequent alfalfa (Medicago sativa) yields. Replicated factorial experiments were conducted at three locations in northern Ontario from 1993 to 1995. Companion crop forage yields were increased and quality decreased by harvesting as the heads emerged as compared to the late boot stage. Triticale (X Triticosecale) was lower yielding than either oats (Avena sativa) …
The Effect Of Different Oversown Legume Species And Row Spacings Upon The Production Of Degraded Cultivated Pastures,
2024
FCA-UNMdP/EEA
The Effect Of Different Oversown Legume Species And Row Spacings Upon The Production Of Degraded Cultivated Pastures, M R. Colabelli, A Mazzanti
IGC Proceedings (1977-2023)
The establishment and growth of three leguminous plants Medicago sativa (A), Trifolium pratense (TR) and Lotus corniculatus (LC) was analysed. They were oversown on three different row spacings (10, 20 y 40 cm) on September 12, 1994. Density was estimated by marking and sequential counting of seedlings. Growth was estimated from Leaf Area Index (LAI) and from forage accumulation per area unit on three dates: D1 = 26/01/95; D2 = 11/04/95; D3 = 5/12/95. Total forage accumulation was higher (p<0.05) for the treatments oversown with TR in D1 at the smaller distances (average from 10 and 20 cm, 4130 kg DM/ha, 46% higher than treatment control (C); all the other treatments did not differ from C). In D2 there were no differences between treatments (average 1995 kg DM/ha); in D3 there were no differences among the oversown treatments (average 2498 kg DM/ha) and forage accumulation was 59% higher than C. There was no difference in seedling density between oversown legumes A and TR but both were higher (p<0.05) than that of LC. The relationship between the LAI of the oversown legume and that of the vegetation present was higher (p<0.05) for TR than for the rest of the treatments: D1, TR=1.43, A=0.21, LC=0.1; D2, TR=1.62, A=0.31, LC=0.2 and D3, TR=1.91, A=0.86, LC=1.05 . It is concluded that it is feasible to increase yield and modify botanical composition of degraded pastures by oversowing legumes.
Relation Between Growth In Summer And The Overwintering Ability In Hybrid Pennisetum And Napiergrass Genotypes,
2024
Miyazaki University
Relation Between Growth In Summer And The Overwintering Ability In Hybrid Pennisetum And Napiergrass Genotypes, Y Ishii, K Ito, S Shinohara
IGC Proceedings (1977-2023)
The growth in summer and the overwintering ability of interspecific hybrid (Hy) between pearl millet (Pennisetum glaucum) and napiergrass (P. purpureum) was compared with those of two napiergrass varieties, i.e. Wruk Wona (Wr) and Merkeron (Me) in the field. The Hy had smaller dry matter yield (DMY) and mean tiller weight with higher tiller number and in vitro dry matter digestibility (IVDMD) than Wr and Me at the end of July, but DMY and IVDMD were not significantly different among genotypes in November. Regrown percentage of plants, number and dry weight of regrown tillers after overwintering were the …
Seasonal Changes In Photosynthetic Rate Of 6 Panicum Genotypes,
2024
Miyazaki University
Seasonal Changes In Photosynthetic Rate Of 6 Panicum Genotypes, Q S. Cai, Y Ishii, K Ito
IGC Proceedings (1977-2023)
Three varieties each in Panicum maximum (PM) and P. coloratum (PC) were measured for the seasonal changes in the gas exchange rate in the field at Miyazaki, Japan. The gross photosynthetic rate (Pg) under the same photosynthetic active radiation (PAR) of 1000 μmol m-2s-1 and the dark respiratory rate (Rd) of leaf blade under the mean environmental air temperature on the measuring day differed among six varieties from autumn to the next spring. With the decrease in air temperature, the Pg and the Rd in the varieties of PM (typically, coldsensitive Natsukaze (NAT)) declined more rapidly than those of PC …
Moisture Stress In Hill Country Pastures Of New Zealand,
2024
Massey University
Moisture Stress In Hill Country Pastures Of New Zealand, I Valentine
IGC Proceedings (1977-2023)
Moisture stress is a recognised factor in the persistence of desirable pasture species of naturalised hill country pastures of New Zealand. Two variables in a soil water balance model are examined here for their contribution to maintaining plant cover. Soil water infiltration is not a limiting factor even though these hill country soils will respond to lime and this response is believed to be due to its effect on the physical properties of the soil. However, the effect of microtopography and wind direction does reduce soil water input.
Effect Of Nitrogen Input On Performance Of A Sodseeded Temperature Legume-Grass Mixture,
2024
Louisiana State University
Effect Of Nitrogen Input On Performance Of A Sodseeded Temperature Legume-Grass Mixture, M W. Alison
IGC Proceedings (1977-2023)
The objective of this study was to determine the effect of N application rate and timing on forage production when an annual ryegrass (Lolium multiflorum Lam.) and red clover (Trifolium pratense L.) mixture is overseeded on a warm-season grass sward. Nitrogen was applied soon after planting in the fall at rates of 0, 38, 76 and 114 kg ha-1 and in late February at 0, 56 and 112 kg ha-1. Fall and winter N rates were included in a 4 x 3 factorial arrangement. Forage production was measured monthly from February through June and botanical composition was determined …
Understanding Growth Dynamics Of Rangeland Species Under Unlimited Water And Rainfed Conditions,
2024
Texas Agriculture Extension Service
Understanding Growth Dynamics Of Rangeland Species Under Unlimited Water And Rainfed Conditions, K L. Shropshire, J W. Stuth
IGC Proceedings (1977-2023)
This experiment was conducted to determine the maximum potential yield of native plant species when maintained in an unlimited water and natural rainfed environments to support the PHYGROW forage production model. Samples of the dominant rangeland plant species found in Central Texas were collected eight times during a 365 day period in 1995-96. Weight per unit basal area, and canopy area increased significantly throughout the growing season in bunchgrasses and sod/rhizomatous grasses, respectively, in water unlimited plots. Individual plant weight of forbs increased with irrigation, although it was only significant for the legume, Texas Bluebonnet. Woody plants exhibited little response …
Effects Of Seasonal Cutting Regimes On The Dm Yield Of Temperate Pastures. Ii. Response To Frequency Of Defoliation Of A Five-Year Old Sown Pasture, E A. Moliterno, R A. Zanoniani
IGC Proceedings (1977-2023)
The effects of three frequencies (15; 30 and 45 days) of defoliation were assessed on a five-year-old temperate pasture composed of tall fescue (Festuca arundinacea Schreb.), white clover (Trifolium repens L.) and birdsfoot trefoil (Lotus corniculatus). Total annual DM yield showed a significant lower production for the most frequent defoliation management, 30 and 45 days frequency treatments averaging 32% more forage production with no statistical difference between them. Spring was the only season in which the more lenient defoliation significantly outyielded the 15- day interval treatment, which made up for the annual difference recorded. Through the …
Effects Of Seasonal Cutting Regimes On The Dm Yield Of Temperate Pastures. I. Response Of A Second-Year Sown Pasture, E A. Moliterno, R A. Zanoniani, C Tafernaberry
IGC Proceedings (1977-2023)
The effects of combined frequencies and intensities of defoliation were assessed through different sward heights at cutting time and residual stubble heights on a second-year temperate pasture composed of tall fescue (Festuca arundinacea Schreb.), white clover (Trifolium repens L.) and birdsfoot trefoil (Lotus corniculatus). Frequencies of defoliation could only be evaluated in autumn and winter since soil water deficit became especially critical in spring and summer. Main differences in yield within seasons were due to a combination of the intensity of defoliation at which the particular treatment was managed and that of the previous season. …
Sward Structure Change And Production Increases Following Spring Grazing Management,
2024
IREGEP
Sward Structure Change And Production Increases Following Spring Grazing Management, A Hernandez Garay, J Hodgson, C Matthew
IGC Proceedings (1977-2023)
The objective of this experiment was to study sward structure effects on production of perennial ryegrass-white clover swards with and without white clover following lax spring grazing periods of different duration. Two periods of 6 (short release - SR) and 12 (long release - LR -) weeks of lax grazing were compared against a conventional hard grazing throughout (early control - EC). Treatments were arranged in a factorial design with 3 replicates. Changes in sward structure were reflected in herbage production before (spring) and after the control period (summer-autumn). During spring, herbage mass was increased as a consequence of an …
Effects Of Cutting Height On Yield And Quality Of Five Napier Cultivars,
2024
Royal Veterinary and Agricultural University
Effects Of Cutting Height On Yield And Quality Of Five Napier Cultivars, S T. Jorgensen, S Tudsri, A Pookpakdi, O Stolen
IGC Proceedings (1977-2023)
Results of this experiment revealed that dry matter yield of five Napier grass species increased with higher stubble and that a delay in closing date had produced a negative effect on regrowth for the following season, especially, when low cutting height had been imposed. The nitrogen and phosphorus percentage in leaf and stem materials were not affected by cutting height. Potassium percentage and NDF% were lower for herbage with 0 cm cutting height compared to 30 cm cutting. Among the different cutting intensities, 20 cm and 30 cm cutting height can be recommended through the growing season.
Effects Of Grazing And Mowing On Leymus Chinensis Grassland In The Songnen Plain Of Northeastern China,
2024
Northeast Normal University
Effects Of Grazing And Mowing On Leymus Chinensis Grassland In The Songnen Plain Of Northeastern China, R Z. Wang, E A. Ripley
IGC Proceedings (1977-2023)
Effects of mowing and grazing on a Leymus chinensis grassland in the Songnen plain of northeastern China were studied using eight replicates of four grazing and mowing treatments. Canopy cover and biomass of the dominant species (L. chinensis) were lower, and cover of the halophyte Suaeda corniculata higher, on grazed than ungrazed; ungrazed plots showed a response to mowing, but not grazing; species diversity increased with grazing and mowing. This study found dissimilar effects of grazing and mowing on plant populations, canopy biomass and structure in L. chinensis grassland. Possible interactions between the principal disturbances on the grassland are …
Overgrazing Impact Upon Rangeland Ecosystems Of Kazakstan Deserts,
2024
Republic of Kazakstan
Overgrazing Impact Upon Rangeland Ecosystems Of Kazakstan Deserts, K Karibayeva
IGC Proceedings (1977-2023)
Vegetation dynamics trends are studies in connection with natural and human-induced factors. Interrelation of rangeland ecosystems with climate and grazing type is revealed. Degression, demutation and dynamics regulation diagrams are given for different conditions of use. Some quantitative and qualitative criteria were elaborated for rangeland ecosystems assessment. Ecosystem degradation indicators were identified, methods were elaborated for making subject maps for environmental assessment and sustainable management of grasslands. A method of seasonal cartographic rangeland cadastre was elaborated by the example of Volga - Ural sands on the basis of the map (S. 1:500,000)
