Relationship Between Height And Sward Quality In Rotational Dairy Systems,
2024
Universidade de Santiago de Compostela
Relationship Between Height And Sward Quality In Rotational Dairy Systems, M R. Mosquera-Losada, A Gonzalez-Rodriguez
IGC Proceedings (1977-2023)
Height is a good guide for management in dairy systems.Intake by dairy cows depends on amount offered and quality of pasture and for this reason a relationship between that offered and pasture quality with height should be studied. The experiment was conducted in NW of Spain with three different stocking rates in dairy systems. A lower quality sward was found in the taller offered pasture as indicated by its higher ADF and lower CP percentages. Total sward ADF (kg x ha-a) was higher in taller offered pasture, which indicated a lower pasture quality, however the total CP was positively related …
Non-Destructive Methods For The Estimation Of Sward Production,
2024
Universidad de Santiago de Compostela
Non-Destructive Methods For The Estimation Of Sward Production, M R. Mosquera-Losada, A Gonzalez-Rodriguez
IGC Proceedings (1977-2023)
Two non- destructive methods of grass production were compared: grassmeter and sward stick, in order to find an equation for transforming one into the other in dairy rotational systems. Linear, logarithmic and quadratic equations were fitted to the data. Linear equation was preferred by simplicity. General equations which included all the year periods showed no differences between sward stick and grassmeter. A detailed study of the different phenology states showed lower heights with grassmeter than with the sward stick method, which should take into account grazing management height recommendations.
Formation And Development Of The Center For Grassland Studies At The University Of Nebraska,
2024
University of Nebraska - Lincoln
Formation And Development Of The Center For Grassland Studies At The University Of Nebraska, M A. Massengale
IGC Proceedings (1977-2023)
The Center for Grassland Studies was formed at the University of Nebraska in 1994 to implement focused interdisciplinary research, educational, and service programs and activities that emphasize the role of grasslands as a natural resource and conservation measure and that enhance the efficiency, profitability, sustainability, and aesthetic value of grasslands, wetlands, and turf. Although the Center is still in a developmental stage, it appears to be accomplishing those objectives.
The Transformation Of Greek Grasslands Under The Impact Of Socio-Economic Factors,
2024
Agricultural Development Office of Granitsa
The Transformation Of Greek Grasslands Under The Impact Of Socio-Economic Factors, R Thanopoulos
IGC Proceedings (1977-2023)
The impact of socio-economic factors on the transformation of Greek grasslands is examined. Factors like urbanisation, migration, collapse of traditional way of life, social pressure for land distribution, intensification of agriculture shaped the evolution of grasslands. Thus, these factors should be taken into consideration for the planning of grasslands management.
Revisiting Fr13a For Submergence Tolerance: Beyond The
Sub1a Gene,
2024
International Rice Research Institute
Revisiting Fr13a For Submergence Tolerance: Beyond The Sub1a Gene, Waseem Hussain, Mahender Anumalla, Abdelbagi M. Ismail, Harkamal Walia, Vistas Kumar Singh, Ajay Kohli, Sankalp Bhosale, Hans Bhardwaj
Department of Agronomy and Horticulture: Faculty Publications
Rice landrace FR13A is the original donor of the SUB1A gene. FR13A harbors hidden genetic variation that surpasses the submergence tolerance level of SUB1A. Here, we provide an overview of the unique features of FR13A associated with exceptional recovery ability that have been overlooked since the significant discovery of the SUB1 locus. We present a detailed overview of how to underpin the new genes associated with the recovery ability seen in FR13A. Finally, we propose a unique approach to develop rice cultivars that surpass submergence tolerance beyond the SUB1 locus from FR13A.
The Role Of Exogenous Gibberellic Acid (Ga3) Application In Breaking Seed Dormancy In Clematis Hirsutissima,
2024
Eastern Washington University
The Role Of Exogenous Gibberellic Acid (Ga3) Application In Breaking Seed Dormancy In Clematis Hirsutissima, Ashley Grace Ogle
2024 Symposium
Seed germination in plants is controlled by several mechanisms, including the presence of phytohormones like gibberellins, as well as environmental conditions, such as temperature, light, and moisture. Germination of dormant seeds can be promoted by the exogenous application of Gibberellic Acid (GA3). GA3 acts as a natural endogenous regulator of dormancy. Clematis hirsutissima, commonly known as Sugarbowls, in the plant family Ranunculaceae, is an important perennial species that contributes to biodiversity in western prairie ecosystems by providing habitat for pollinators and wildlife; and it is also a species that shows characteristic embryo dormancy. This native to Washington, has been used …
Data Requirements For Whole-Farm Economic Analysis Of Grazing Alternatives,
2024
Kansas State University
Data Requirements For Whole-Farm Economic Analysis Of Grazing Alternatives, R O. Burton Jr
IGC Proceedings (1977-2023)
The purpose of this paper is to contribute to better communications among the agronomists, animal scientists, and agricultural economists on interdisciplinary teams, that wish to provide useful information to forage producers. This is accomplished by discussing major issues and data requirements for whole-farm economic analysis.
Native Grasslands Of Yugoslavia As A Potential For "Biologically High Quality Food" Production - To Be Preserved And Used For The Benefit Of All,
2024
Institute for Animal Husbandry, Belgrade, Yugoslavia
Native Grasslands Of Yugoslavia As A Potential For "Biologically High Quality Food" Production - To Be Preserved And Used For The Benefit Of All, Djordjevic-Milosevic Suzana, Negovanovic Dragan, Zakonovic Miodrag
IGC Proceedings (1977-2023)
Natural grasslands are the base of the livestock production in the hilly-mountainous regions of Yugoslavia. Poor economic power of the owners of these areas brought about a complete dying out of agricultural production in these regions in the last few years. In the same time, the lack of financial resources made it impossible for the farmers to use the fertilisers, protective and other chemical agents which result in a high degree of environmental preservation. Due to current economic policy at this time the population has moved out and there is no industrialisation. The revival of agriculture on the hilly-mountainous regions …
Some Economics Problems Of Range Resource Analysis In Free And Open Access Environment,
2024
Universite de Dschang
Some Economics Problems Of Range Resource Analysis In Free And Open Access Environment, E Tedonkeng Pamo
IGC Proceedings (1977-2023)
Economic analysis has been the traditional means by which the costs and benefits of rangeland conservation and sustained development have been identified. Conventional analysis has proved inadequate for dealing with the following realities : (1) open access in circumstances of poorly defined common-resource ownership tends to encourage over exploitation; (2) many costs of rangeland degradation involve externalities that will occur in the future; (3) the values of preservation and sustained management are substantial and can be translated into financial assistance; and (4) benefits from rangeland are not often appreciated because of lack of knowledge from rangeland. Recent approaches to economic …
Studies On The Distribution And Formation Of The Meadows In China,
2024
Hulenbeir Grassland Institute
Studies On The Distribution And Formation Of The Meadows In China, Feng Guojun, Zhang Xiujun, Zhu Libuo, Wei Shaocheng, Zhang Yongliang
IGC Proceedings (1977-2023)
The lowland meadows are distributed on the Northeast Plains in the temperate zone in China, and its area became less and less with an increase of longitude. There are some regularities for the distribution of montane meadows, sub-montane meadows and cold-alpinal meadows. And the distribution and formation for meadows are independent upon the zonal climate and their environmental soil moisture.
Sward Structure Under Continuous And Rotation Grazing,
2024
UZPI
Sward Structure Under Continuous And Rotation Grazing, V Pavlu, J Velich
IGC Proceedings (1977-2023)
Sward structure under continuous (CG) and rotational (RG) grazing system was studied at an experimental pasture in the Jizerské hory mountains. Herbage mass and vertical distribution was assessed by cutting ten quadrats (0.1 x 0.5 m) and separated into grass, white clover, dandelion, other forbs and dead material. The proportions of grasses was higher at RG (on average 51% of the pasture mass) than at CG (41%). In the years with normal amount and distribution of precipitation the proportion of white clover was higher at CG (17%) than at RG (9%). The lack of summer precipitation damaged more significantly the …
Beef Cattle Production On Renovated Grass Pastures In Savannas Of Brazil,
2024
EMBRAPA-CNPGC
Beef Cattle Production On Renovated Grass Pastures In Savannas Of Brazil, V.P B. Euclides, M.C M. Macedo, M P. Oliveira
IGC Proceedings (1977-2023)
A 3-year grazing trial was conducted, to study animal production on degraded grass pastures, renovated by two levels of fertilization. All paddocks were divided into halves: one received 1.5 t/ha of dolomitic limestone, 400 kg/ha of a fertilizer formula 0-16-18 and 50 kg/ha of microelements (FL1); and the other 3.0 t/ha , 800 kg/ha and 50 kg/ ha of the same fertilizers (FL2). Productivity on FL2 pastures was greater than that on FL1 pastures, averaging 565 and 395 kg of liveweight gain (LWG)/ha/year, respectively. For all grasses the productivity in both fertilizer treatments decreased linearly from the first to the …
Pasture Attributes And Live-Weight Gain Of Lambs Grazing With Different Supplementation Levels,
2024
Universidad Autonoma de Chapingo
Pasture Attributes And Live-Weight Gain Of Lambs Grazing With Different Supplementation Levels, P A. Martinez-Hernandez, M Meza-Nieto, J Perez-Perez, R Barcena, J G. Herrera
IGC Proceedings (1977-2023)
The purpose of this study was to determine pasture attributes, liveweight gain and stocking rate from a mixed pasture grazed by lambs recieving different supplementation levels. There were four treatments: in two, lambs grazed at 4 or 8% herbage allowance, no supplement; in the other two, lambs grazed at 4% herbage allowance plus a concentrate to cover 25 and 30 or 50 and 60% of estimated daily needs of metabolizable energy and crude protein. Pasture was of perennial and annual ryegrass, orchard grass and red clover. Pre and postgrazing forage mass, crude protein and dead material were not different (P …
Characteristics Of Grass Species In Pasture For High Producing Cows In Northern Japan,
2024
Hokkaido National Agricultural Experiment Station
Characteristics Of Grass Species In Pasture For High Producing Cows In Northern Japan, K Sudo, K Ochiai, T Ikeda
IGC Proceedings (1977-2023)
The prupose of this research was to investigate characteristics of grass species under different conditions appropriate to the intensive grazing system for high producing cows (8000 kg for a 305-day lactation) in northern Japan. Meadow fescue (Festuca elatior L.), timothy (Phleum pratense L.) and perennial ryegrass (Lolium perene L.) white clover (Trifolium repens L.) pastures were established and divided into two plots by difference of regulated plant height (meadow fescue and timothy) or of stocking intensity (perennial ryegrass). Each plot was 60m2 and was grazed when plant height reached 20cm or 30cm. Meadow fescue and perennial …
Live-Weight Gain Of Steers Grazing African Star Grass Four Herbage Allowances,
2024
Colegio de Postgraduados
Live-Weight Gain Of Steers Grazing African Star Grass Four Herbage Allowances, J Perez-Perez, J O. Hernandez-Velez, J G. Herrera-Haro, R Barcena-Gama
IGC Proceedings (1977-2023)
The objective was to determine weight changes of steers grazing African star grass (Cynodon plectostachyus) at four herbage allowances (2.0, 2.5, 3.0 and 3.5 kg of dry matter/100 kg of live weight day-1). A rotational grazing system with 10 grazing days and 30 days rest was followed. A Split Plot Design with four replications was used. Response variables were: daily gain per steer (DGS) and per hectare (DGH), dry matter forage yield (FY), % of utilization (% U) and in vitro dry matter digestibility (DMIVD). DGS and DGH were not different (P >0.05) among allowances and grazing periods. …
Strategic Use Of Brachiaria Decumbens Pasture To Beef Heifers During Dry Season,
2024
EMBRAPA-CNPGC
Strategic Use Of Brachiaria Decumbens Pasture To Beef Heifers During Dry Season, E G. Cardoso, N F. Seiffert, J Marques Da Silva, V.P. B. Euclides, J M. Vieira
IGC Proceedings (1977-2023)
The main objective of this study was to evaluate a Brachiaria decumbens pasture, instead of a common rangeland, for zebu beef heifers during the dry season of the year as a means of anticipating the first calving age from four to three years of age, and so improve the production rate of the herd. Daily liveweight gains (DLWG) were analyzed for the effects of year and three stocking rates during the dry season (SR1=1.5; SR2=2.0 and SR3=2.5 head/ha). The main effect on heifers DLWG was the year (P<0.01), but SR was also important (P<0.05), mainly during the last half of the dry season when pastures are under severe constraints such as soil moisture deficit and low temperatures. The lowest SR presented the highest DLWG (0.204a, 0.174ab and 0.145b kg/head, respectively for SR1, SR2 and SR3), during the dry season. If climatic conditions are not exceptionally bad, heifer first calving occurs at 37 months of age when reared on B. decumbens.
Quality Grassland For Dairy Production In North-West Spain,
2024
CIAM
Quality Grassland For Dairy Production In North-West Spain, A Gonzalez-Rodriguez
IGC Proceedings (1977-2023)
An experiment with two groups of 15 Friesian cows grazing independent areas, with no N and 240 kg N ha-1, was run during two years to see the levels of milk production based on a grass/white clover pasture, maintaining high levels of herbage quality. N application decrease clover content from 55% to 42%. The total DM response to N was low. Herbage utilization was maintained similar in both treatments. Moderate levels of milk production can be reached, more than 4000 litres cow-1 and 9000 litres ha-1, with low use of concentrates, only 400 kg cow-1. Crude protein levels were high …
Sward Height On The Performance Of Cow-Calf Units And Yearling Steers Grazing Cool Season Pasture,
2024
West Virginia University
Sward Height On The Performance Of Cow-Calf Units And Yearling Steers Grazing Cool Season Pasture, E C. Prigge, W B. Bryan, E L. Nestor
IGC Proceedings (1977-2023)
Performance and grazing time of cow-calf units and yearling steers were determined over four years on naturalized cool season pastures maintained at a sward height of 4-6, 6-8, 8-10, or 10-12 cm. Daily gains of cows and steers responded quadratically (P<0.05) to increasing sward heights, with gains maximized at 8-10 cm. Milk production of the cows and gain of the calves were not affected (P>0.10) by sward height. Grazing days (cow-calf unit/hectare) decreased linearly (P<0.01) with increasing sward height. The proportion of the day spent grazing for cows and steers decreased in a linear manner (P<0.05) as pasture height increased. Cows spent less time grazing than steers (P<0.05) at all but the low pasture height.
Buffer Grazing For A Twelve Month Cow-Calf Production System,
2024
West Virginia University
Buffer Grazing For A Twelve Month Cow-Calf Production System, W B. Bryan, E C. Prigge, D J. Flaherty, G E. D'Souza
IGC Proceedings (1977-2023)
Set stocking is a widely used grazing management for beef cow-calf production on Appalachian hill land pastures of the USA. A replicated study was conducted to compare a conventional (set stocking) and buffer grazing management. For the buffer system, grazing area was restricted in the spring and hay was harvested from the ungrazed area. In summer, a portion of this area (buffer) was grazed and a second cutting of hay removed from the remaining area. For the conventional treatment a fixed area was set stocked and hay was harvested on an area designated for hay only. Land areas and fertilizer …
Intensive Rotational Grazing Systems For Dairying In A Subtropical Environment: Animal, Plant, And Soil Responses,
2024
University of Florida
Intensive Rotational Grazing Systems For Dairying In A Subtropical Environment: Animal, Plant, And Soil Responses, J H. Fike, C R. Staples, L E. Sollenberger, D A. Graetz
IGC Proceedings (1977-2023)
Forage species, stocking rate, and supplementation rate effects upon performance of lactating dairy cows were studied. Forage mass and nutritive value and nutrient concentration in shallow groundwater also were measured. Cows (n = 44) grazed bermudagrass (Cynodon dactylon) or rhizoma peanut (Arachis glabrata), stocked at 4.9 or 7.4 cows ha-1, and 2.5 or 4.9 cows ha-1, respectively. Pelleted concentrate:whole cottonseed (80:20) was offered twice daily post milking at 1 kg per 2 or 3 kg of daily milk production. Cows grazing rhizoma peanut produced more (P = .076) milk per day but had greater (P = …
