Can The Restoration Of Degraded Rangelands Ever Be Economic?,
2024
CSIRO
Can The Restoration Of Degraded Rangelands Ever Be Economic?, N D. Macleod, J C. Noble, J R. Brown
IGC Proceedings (1977-2023)
Degradation of rangeland pastures in Australia is widespread and ongoing. The characteristics of many restoration technologies in relation to land values contribute to a perception of their being uneconomic. However, while this might be true within the general context of broadscale application, it need not be the case in specific instances. Both the underlying contexts and processes need to be considered in assessing the economic value of a given restoration technique for a given degradation problem.
Modifying Management Methods To Promote The Reform And Development Of Grassland Based Animal Husbandry Through Better Resource Use,
2024
Xin Jiang Academy of Animal Science
Modifying Management Methods To Promote The Reform And Development Of Grassland Based Animal Husbandry Through Better Resource Use, Cui Heng-Xin, Zhang Jiang-Ling, Asya Jiang-Ling
IGC Proceedings (1977-2023)
The development of grassland livestock production cannot rely on the cost of pasture degradation. The stocking rate has to be based on the pasture production and it also has to be under the guidance of law. Changing management methods, development of grassland agriculture and optimization of the utilization of natural resources is the effective way of improving the reformation and development of grassland livestock production.
Native Grasses In The Pilbara Region, Australia; Resource Acquisition, Allocation And Growth,
2024
University of Western Australia
Native Grasses In The Pilbara Region, Australia; Resource Acquisition, Allocation And Growth, L J. Ingram, L T. Bennett, M A. Adams
IGC Proceedings (1977-2023)
Biomass production and nitrogen content of the native perennial grasses, Barley Mitchell grass (Astrebla pectinata ) and Kangaroo grass (Themeda triandra), were studied over the 1996 growing season. After 160 mm of rain, the biomass of T. triandra increased from 2 to 4 t/ha, while A. pectinata increased from 1.1 to 1.5 t/ha. N in aboveground biomass of T. triandra increased from 14.5 to 17 kg/ha and of A. pectinata from 8.5 to 10 kg/ha. A. pectinata leaves senesced quickly increasing the total amount of N in dead leaves. T. triandra senesced more slowly but dead leaves …
The Effect Of Different Winter Utilization Periods Of A C4 Subtropic Foggage On The Growth Of Weaners,
2024
NWADI P
The Effect Of Different Winter Utilization Periods Of A C4 Subtropic Foggage On The Growth Of Weaners, I F. Reckling, G.H J. Kruger
IGC Proceedings (1977-2023)
A significant (P<0.05) increase in lick consumption was found, as winter progressed, which was attributed to a significant decline in the quality (P<0.05) of Digitaria eriantha foggage. Harvested treatments resulted in a significant (P<0.05) decline in residual soil nitrogen levels compared to unharvested treatments. Losses, due to trampling, on average was 21.25%. It is advocated that Digitaria eriantha ought to be utilised in summer and is only suitable for maintenance if utilised in winter.
Leucaena Leucocephala As A Supplement For Goats On Tropical Pastures,
2024
Universidad del Zulia
Leucaena Leucocephala As A Supplement For Goats On Tropical Pastures, T Clavero, R Razz
IGC Proceedings (1977-2023)
A field experiment was conducted in the dryland farming area of Northwest Venezuela in order to evaluate three diets in grazing goats (pasture only; grazing pasture + 0.3 kg of commercial concentrate/ animal/d; grazing pasture + restricted grazing for 2 hours daily in Leucaena leucocephala) on milk production (mp) and milk composition (fat -f- and mineral concentration -mc-). The experiment was laid out as randomized block design. The data showed significant difference (P<0.05) between treatments. Milk production increased in 50 and 70% when goats had access to commercial concentrate or Leucaena graizing as well as grass pasture compared with the control treatment. Milk production in goats with access to Leucaena was insignificantly different than goats on concentrate. Treatments did not affect milk composition. The results suggest that Leucaena leucocephala can supply an adequate amount of nutrient with similar value to commercial concentrate for milk production in grazing goats.
The Effect Of Long-Term Grazing Treatments On The Establishment Of Woody Plants In A Southern African Savanna,
2024
University of the O.F.S
The Effect Of Long-Term Grazing Treatments On The Establishment Of Woody Plants In A Southern African Savanna, G N. Smit, N.F G. Rethman
IGC Proceedings (1977-2023)
Eight paddocks which were debushed to an open savanna during 1935/36 and subsequently grazed annually during different seasons by steers were surveyed after a period of 54 years. Though woody plants have increased in all the paddocks, regardless of the grazing treatment, the rate of woody plant establishment was notably higher in those paddocks that received a more intense annual grazing treatment. This effect was most noticeable in those paddocks of which the mean Animal Unit-grazing days ha-1 exceeded 100 days annually. These results confirm the existence of a positive linear relationship between the severity of the grazing treatment and …
Monitoring The Stabilization Of Semi-Arid Grassland In The Bridge Creek Watershed Of Central Oregon,
2024
BLM
Monitoring The Stabilization Of Semi-Arid Grassland In The Bridge Creek Watershed Of Central Oregon, R Demmer, L Andrews, B Keller
IGC Proceedings (1977-2023)
Using land exchanges the Bureau of Land Management (BLM) in central Oregon consolidated its land base in the Bridge Creek Watershed between 1987 and 1992 to obtain a 64,500 acre land block. The uplands had been grazed and the valley bottoms farmed since the middle 1800s. Due to improper grazing, primitive irrigation, fire suppression and juniper invasion, the native vegetation was sparse. Weeds were ubiquitous, and soils were eroded. The results of actions taken after baseline inventories of riparian and range communities were monitored. This feedback prompted further actions. Monitoring confirms that increasing native vegetation and decreasing erosion is stabilizing …
Evaluation Of The Chemical Composition Of Some Locally Available Acacia Seeds As Animal Feed In Botswana,
2024
Botswana College of Agriculture
Evaluation Of The Chemical Composition Of Some Locally Available Acacia Seeds As Animal Feed In Botswana, A A. Aganga, C M. Tsopito
IGC Proceedings (1977-2023)
Two separate studies were conducted using indigenous browse seeds. In the first study, seeds from nine locally available Acacia trees were analysed for proximate composition, fatty acid composition and in vitro dry matter digestibility. Nutrient composition of the seeds varied in crude protein from 12.52% for Acacia robusta to 21.82% for Acacia erubescens. Ash content ranged from 3.20% to 4.75%. The in vitro dry matter digestibility ranged from 46.00% for Acacia rehmanniana to 62.00% for Acacia erubescens. Fatty acids present in the seeds included palmitic, linoleic and oleic acids. The second study was to evaluate the influence of processing on …
The Influence Of Range Condition On The Hydrological Characteristics In A Semi-Arid Rangeland,
2024
University of the Orange Free State
The Influence Of Range Condition On The Hydrological Characteristics In A Semi-Arid Rangeland, H A. Snyman
IGC Proceedings (1977-2023)
Herbage production, water-use efficiency (i.e. above-ground phytomass production per unit of evapotranspiration), surface runoff, deep percolation, soil loss and soil organic matter content were determined on rangeland in three different ecological conditions, viz. poor, moderate and good, for 20 years. Hydraulic non-floating lysimeters were used to determine evapotranspiration (Et), soil evaporation (E) and deep percolation. Runoff and soil loss were recorded on runoff plots. Above-ground phytomass production, water-use efficiency, deep percolation and soil organic matter content decreased (P<0.01) when plant cover was reduced or range and soil condition declined. The dense plant cover of veld in good condition provides a situation in which surface runoff and soil loss rates are lower (P<0.01) than that from veld in poor condition.
Carbon Sequestration- Additional Environmental Benefits Of Forage In The Pfra Permanent Cover Program,
2024
Agriculture and Agri-Food Canada
Carbon Sequestration- Additional Environmental Benefits Of Forage In The Pfra Permanent Cover Program, G M. Luciuk
IGC Proceedings (1977-2023)
International concern about greenhouse gases and their impacts on climate change has added to the need for an understanding of carbon sequestered in agricultural soils. This paper evaluates the carbon sequestration potentials of the 522 000 hectares converted from annual cultivation to forages under the Prairie Farm Rehabilitation Administration’s (PFRA) Permanent Cover Program (PCP). The 15 000 PCP sites in the prairie provinces of Canada are matched to their dominant soil characteristics. Estimates of carbon losses due to annual crop cultivation are determined for these soil characteristics, and sequestration potentials under the permanent cover condition are presented. Estimates of societal …
Biomass Partitioning In Grasses Subjected To Defoliation,
2024
Volcani Center
Biomass Partitioning In Grasses Subjected To Defoliation, M Gutman, I Noy-Meir, D Pluda, S Rothman
IGC Proceedings (1977-2023)
Containerized plants of Perennial wild barley (Hordeum bulbosum) grown from corms and of Wild emmer wheat (Tritium diccocoides) grown from seeds, were grown in environmental conditions comparable to those encountered under field conditions. Both species were subjected to 3 defoliation frequencies ( once, twice and three times during the season) each at 3 different clipping heights (1, 2.5 and 5 cm above ground level ) plus a control treatment (10 treatments in all). Wild emmer wheat control plants had significantly higher cumulative total and reproductive biomass over all harvests than all clipped plants. Clipping height and …
Salt Tolerance In Herbage And Its Application To Greening The Desert,
2024
Tokyo University of Agriculture
Salt Tolerance In Herbage And Its Application To Greening The Desert, Y Maeda, T Otani, K Ogiwara, S Murai, H Takenaga
IGC Proceedings (1977-2023)
Canadian peat moss was used as water holding material and the efficacy of mixing the peat with the sand on water holding capacity of the sand, and the adaptability of alfalfa (AL), burmudagrass (BG), bahiagrass(BH), weeping lovegrass (WL) and Japanese lawngrass(JL) to dry and saline conditions were investigated. Without mixing peat, pF value of the sand did not change for 6 days after watering, but rose markedly up to 2.9 after 18 days. With mixing peat at the rate of 2% by the sand weight, the value did not change for 20 days, and rose gradually up to 2.5 on …
Some Improvable Points For Better Utilization Of Reed Canarygrass Cultivars In Japan,
2024
Tokyo University of Agriculture
Some Improvable Points For Better Utilization Of Reed Canarygrass Cultivars In Japan, T Otani, M Ito, Y Maeda, Y Kurihara
IGC Proceedings (1977-2023)
Relationships among growth stage, herbage quality, and dry matter accumulation of reed canarygrass cultivars were investigated in a rainy mountainous district of Japan. Fiber content accumulated during the primary growth correlated with some growth characters of this grass, especially with preferential culm expansion, so that total amount of cell wall constituents reached a remarkably high level about the time when culm/foliage (C/F) ratio in dry matter was elevated above 1.5. In aftermaths, whose early regrowth went on rather quickly, dry matter accumulation began to decline at the stage that C/F ratio of standing crop became ca. 1.0 and fiber content …
Forage Yields Of Simple Mixtures Of Selected Genotypes Of Grasses And Adapted Herbaceous Legumes In Southwest Nigeria,
2024
University of Ibadan, Nigeria
Forage Yields Of Simple Mixtures Of Selected Genotypes Of Grasses And Adapted Herbaceous Legumes In Southwest Nigeria, I Ezenwa, M E. Aken'ova
IGC Proceedings (1977-2023)
Three tropical grasses viz. Guinea grass (Panicum maximum Jacq), elephant grass (Pennisetum purpureum Schum) and star grass (Cynodon nlemfuensis Vanderyst) and three herbaceous legumes viz. Verano stylo (Stylosanthes hamata (L) Taub), centro (Centrosema pubescens Benth) and tropical kudzu (Pueraria phaseoloides (Roxb) Benth) were evaluated for their dry matter (DM) yield potential in mixtures and sole stands. Annual DM yields of Verano stylo in mixtures with star grass, Guinea grass and elephant grass as well as tropical kudzu mixtures with Guinea grass and elephant grass varied between 13.2 and 14.2 t/ha. These yields were similar to …
Multiple Land Use Management: Case Studies On Building Partnerships,
2024
Saskatchewan Wetland Conservation Corporation
Multiple Land Use Management: Case Studies On Building Partnerships, Greg Riemer, Tom Harrison
IGC Proceedings (1977-2023)
As part of the Saskatchewan commitment to the North American Waterfowl Management Plan the Saskatchewan Wetland Conservation Corporation (SWCC) is acquiring over 30,000 acres of native vegetation in a contiguous block around the Big Quill Lake in east central Saskatchewan. Some of this range land was in extremely poor condition. This lake is of internationally significant importance to waterfowl, nesting and migrating shorebirds. SWCC goals for this area are to improve the condition and vigour of the range for livestock and to provide and protect habitat for wildlife such as Baird's sparrow and piping plovers. Big Quill Lake is a …
Yield Formation And Changes In Quality In Legume-Grass Mixtures As Affected By N-Fertilization, Irrigation And Grass Species,
2024
Humboldt-University Berlin
Yield Formation And Changes In Quality In Legume-Grass Mixtures As Affected By N-Fertilization, Irrigation And Grass Species, K Richter, K Schmaler
IGC Proceedings (1977-2023)
In the years of 1984 to 1992 field experiments have been conducted with different legume-grass mixtures at a location in north-east Germany. Dry matter yield, crude protein and crude fibre content in legume-grass mixtures changed by N-fertilization, grass species, duration of utilization and irrigation. First this was caused by the effect of these factors on yield proportion. The variation of N-fertilization and irrigation influenced red clover grown in a mixture with grass more than lucerne-grass mixture. Irrigation of red clover-grass mixture supported the yield proportion of legume whereas N-fertilization and duration of utilization supported the grass species. Yield proportion, crude …
Some Ecological Aspects Of Semi-Natural And Temporary Grasslands,
2024
Grassland and Mountain Agriculture Research Institute, Mládeznícka
Some Ecological Aspects Of Semi-Natural And Temporary Grasslands, N Gaborcik, L Ondrasek, J Cunderlik, J Tomaskin, T Kizek
IGC Proceedings (1977-2023)
Some ecological aspects were studied in semi-natural and temporary grasslands at different levels of fertilizer application. The research was carried out in the upland region of central Slovakia at the altitude of 460 m in Banská Bystrica. At zero fertilizer application, soil CO2 production and Cox content were higher in the temporary grassland. Atmospheric N fixation was also higher in the temporary grassland. However, root accumulation, microbial biomass content and R : S ratio were lower in the temporary grassland. By comparison with the semi-natural grassland, leaf area index (LAI), net assimilation rate (NAR) and crop growth rate (CGR) were …
The Productivity And Botanical Composition Of Permanent, Temporary And Slot Seeded Grassland,
2024
ÚZPI, Grassland Research Station
The Productivity And Botanical Composition Of Permanent, Temporary And Slot Seeded Grassland, J Fiala, J Gaisler, V Pavlu
IGC Proceedings (1977-2023)
The development of botanical composition and primary production was followed from 1993 to 1995 at the southern side of the Jizera Mountains on three-cutting permanent, temporary and slot seeded grassland. Each grassland type was divided into 4 variants with various doses of mineral fertilization. The same clover-grass mixture composed of 5 components were used for the renovation by ploughing and slot seeding. During three years of the observation a very fast drop of the clover portion for the benefit of grass species and herbs was noted especially by the renewed grassland. Also sown grass species in the renewed grassland declined …
Galega Orientalus Lam. Var "Gale" New Legume, Protein And Perennial Fodder Crop In Fr Yugoslavia,
2024
SEME
Galega Orientalus Lam. Var "Gale" New Legume, Protein And Perennial Fodder Crop In Fr Yugoslavia, B Radenovic
IGC Proceedings (1977-2023)
In our four-year research, (Galega orientalis Lam.) Var. “GALE” grown in the region of North Backa, FR Yugoslavia, gave a considerably higher yield in green mass, hay, crude protein content, crude fat content, ash and dry matter contents, compared to control plant (average of the 1991/96 trials). During hay stacking, leaves did not fall off, which is a very favorable property.
Effect Of Clipping Frequency Of Some Fodder Grasses In The Semi-Arid Region Of Tamil Nadu, India,
2024
Madurai Kamaraj University
Effect Of Clipping Frequency Of Some Fodder Grasses In The Semi-Arid Region Of Tamil Nadu, India, K Manoharan, K Paliwal
IGC Proceedings (1977-2023)
Clipping frequency and water stress play a major role in the biomass production of grasses. Bajra - Napier BN2 and CO1 showed maximum above ground biomass under monthly clipping without water stress. The above ground biomass of Bajra-Napier BN2, Panicum maximum Hamil and Guinea grass were not affected under weekly and fortnightly clipping with water stress. Water stress affected the monthly clipped and unclipped plant above ground biomass but the below ground biomass increased in all the fodder grasses except Brachiaria mutica.
