Breeding Forage Grasses to Maximize Animal Performance

2015 ◽  
pp. 71-104 ◽  
Author(s):  
Gordon C. Marten
Keyword(s):  
Animal Performance ◽  
Forage Grasses

Effects of hazardous environments on animal performance

1992 ◽  
Author(s):  
G. Carroll Brown ◽  
Dennis W. Blick ◽  
Michael R. Murphy
Keyword(s):  
Animal Performance ◽  
Hazardous Environments

THE USE OF PASTURE HEIGHT AS A PREDICTOR OF FEED LEVEL IN NORTH ISLAND HILL COUNTRY

1986 ◽  
pp. 249-253 ◽  
Author(s):  
R.W. Webby ◽  
W.J. Pengelly
Keyword(s):  
Late Spring ◽  
Animal Performance ◽  
Considerable Effort ◽  
Management Decisions ◽  
Hill Country ◽  
Visual Impact

Considerable effort is expended measuring pasture parameters that relate to animal perform mance. Traditionally farmers have used visual impact and experience as their method of pasture assessment to make management decisions. The simplest measurement collected by researchers, pasture height, is developed to the point where it can be used as a guide to predict pasture mass and animal performance. This paper presents relationships between height and mass for improved pastures in summer dry North Island hill country. A pasture 5cm tall will give hogget growth of 60 gjday in summer, 90 in autumn, 100 in winter and 200 in spring. Similarly 5cm will be 2250 kg DM/ha in summer, 1900 in autumn, 1520 in winter, 1640 in spring and 2200 in late spring. Keywords: Height, mass, predictor, grazing, quality, animal performance, feed levels, parameters, pasture.

Evaluation of collection accessions of fodder grasses for economical traits

2018 ◽  
pp. 54-65
Author(s):  
L.Z. Baistruk-Hlodan ◽  
M.M. Khomiak ◽  
G.Z. Zhapaleu ◽  
G.L. Koval
Keyword(s):  
Gene Pool ◽  
Red Clover ◽  
The State ◽  
Initial Material ◽  
Forage Grasses ◽  
Economic Traits ◽  
State Register ◽  
Carpathian Region ◽  
Resource Collection ◽  
Fodder Grasses

The goal was to include new accessions of perennial leguminous and cereal grasses to the collection, to evaluate them in terms of a set of valuable morphological and economic features and to identify sources of these features for breeding.Results and discussion. The collections of gene pool accessions created due to introduction of cultivars and wild forms as well as breeding accessions identified during practical breeding serve as initial material for the breeding of red clover, alsike clover and cock's-foot in the Institute of Agriculture of the Carpathian Region. For the period of 2000-2017, 944 accessions of forage grasses registered in the Central Database were included in the collection: 405 legumes (red clover – 161, alsike clover – 11) and 539 cereals (cock's-foot – 145); 591 accessions were stored in the National Depository. In-depth studies of morphological and economic traits of the accessions allowed us to create and to register a basic collection of the forage grasses gene pool, a trait collection of red clover for yield and resistance to powdery mildew (it includes 52 accessions from 5 countries), a trait collection of cock's-foot for yield and resistance to unfavorable factors (49 accessions from 8 countries) and to register valuable red clover accession No. 193 and cock's-foot accession Drogobychanka Piznia with the NCPGRU. Based on the collection accessions, varieties were created and included in the State Register of Plant Varieties Suitable for Dissemination in Ukraine: red clover Truskavchanka since 2016, alsike clover Prydnistrovska since 2002, cock's-foot Marichka since 2014. Since 2015, red clover variety Ukrainochka and cock's-foot variety Boikivchanka have been tested in the state scientific expert evaluation.Conclusions. The creation of the genetic resource collection allowed us to study and analyze the genetic potential of the species, to identify initial material with valuable economical traits, which will significantly increase the efficiency of fodder grasses breeding.

Animal Performance on Limpograss‐Aeschynomene and Nitrogen‐Fertilized Limpograss Pastures

1988 ◽  
Vol 80 (6) ◽  
pp. 957-962 ◽  
Author(s):  
G. A. Rusland ◽  
L. E. Sollenberger ◽  
K. A. Albrecht ◽  
C. S. Jones ◽  
L. V. Crowder
Keyword(s):  
Animal Performance

scholarly journals Applying RGB- and Thermal-Based Vegetation Indices from UAVs for High-Throughput Field Phenotyping of Drought Tolerance in Forage Grasses

2021 ◽  
Vol 13 (1) ◽  
pp. 147
Author(s):  
Tom De Swaef ◽  
Wouter H. Maes ◽  
Jonas Aper ◽  
Joost Baert ◽  
Mathias Cougnon ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Lolium Perenne ◽  
High Throughput ◽  
Festuca Arundinacea ◽  
Stress Index ◽  
Forage Grasses ◽  
Crop Water Stress Index ◽  
Ploidy Levels ◽  
Field Phenotyping

The persistence and productivity of forage grasses, important sources for feed production, are threatened by climate change-induced drought. Breeding programs are in search of new drought tolerant forage grass varieties, but those programs still rely on time-consuming and less consistent visual scoring by breeders. In this study, we evaluate whether Unmanned Aerial Vehicle (UAV) based remote sensing can complement or replace this visual breeder score. A field experiment was set up to test the drought tolerance of genotypes from three common forage types of two different species: Festuca arundinacea, diploid Lolium perenne and tetraploid Lolium perenne. Drought stress was imposed by using mobile rainout shelters. UAV flights with RGB and thermal sensors were conducted at five time points during the experiment. Visual-based indices from different colour spaces were selected that were closely correlated to the breeder score. Furthermore, several indices, in particular H and NDLab, from the HSV (Hue Saturation Value) and CIELab (Commission Internationale de l’éclairage) colour space, respectively, displayed a broad-sense heritability that was as high or higher than the visual breeder score, making these indices highly suited for high-throughput field phenotyping applications that can complement or even replace the breeder score. The thermal-based Crop Water Stress Index CWSI provided complementary information to visual-based indices, enabling the analysis of differences in ecophysiological mechanisms for coping with reduced water availability between species and ploidy levels. All species/types displayed variation in drought stress tolerance, which confirms that there is sufficient variation for selection within these groups of grasses. Our results confirmed the better drought tolerance potential of Festuca arundinacea, but also showed which Lolium perenne genotypes are more tolerant.

scholarly journals 6 Animal performance in grass monoculture or silvopasture systems using tree legumes

2020 ◽  
Vol 98 (Supplement_2) ◽  
pp. 18-19
Author(s):  
Izabela Aline Gomes da Silva ◽  
Jose Carlos Batista Dubeux ◽  
Alexandre C Leão de Mello ◽  
Márcio Vieira da Cunha ◽  
Mércia Ferreira dos Santos ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Experimental Design ◽  
Accumulation Rate ◽  
Average Daily Gain ◽  
Gliricidia Sepium ◽  
Tropical Region ◽  
Stocking Rate ◽  
Animal Performance ◽  
Management Option ◽  
Daily Gain

Abstract Silvopasture systems (SPS) area management option to enhance delivery of ecosystem services and diversification of income. This study evaluated productive responses of signalgrass (UrochloadecumbensStapf.) in monoculture or in SPS in the sub-humid tropical region of Brazil during six months of the rainy season. The experimental design was randomized complete block with three replications. Treatments were signalgrass + Mimosa caesalpiniifolia Benth. (SPS-Mimosa); signalgrass + Gliricidia sepium (Jacq.) (SPS-Gliricidia); and signalgrass monoculture. Cattle were managed under continuous stocking with variable stocking rate. Response variables included herbage mass (HM), herbage accumulation (HA), stocking rate (SR), average daily gain (ADG), and gain per area (GPA). Herbage mass (HM) was greater (P < 0.0001) on signal grass monoculture (2045 kg DM/ha) than in SPS (1370 kg DM/ha, average for both SPS). Herbage accumulation rate was similar for signalgrass in monoculture and SPS-Gliricidia (avg. 61 kg DM ha-1 d-1), and both were greater than SPS-Mimosa (37 kg DM ha-1 d-1). Average daily gain was greater(P < 0.0001) for SPS-Gliricidia (1.1 kg head-1 d-1), followed by signalgrass in monoculture (0.9 kg head-1 d-1), and SPS-Mimosa (0.3 kg head-1 d-1). Stocking rate ranged from 0.6 animal units (1AU = 450-kg animal) per ha in April to 2.2 AUha-1 in June. Stocking rate and animal performance per area were similar for signalgrass in monoculture and SPS-Gliricidia, and both greater than SPS-Mimosa. Gliricidia enhanced animal performance and provided ecosystem services. Mimosa, however, reduced animal performance likely due to the competition with signalgrass. Mimosa trees, however, are an important source of income (timber used for fence posts) and that might overcome the losses in animal performance.

Genetic markers and the selection of quantitative traits in forage grasses

Euphytica ◽  
1994 ◽  
Vol 77 (3) ◽  
pp. 269-275 ◽  
Author(s):  
M. D. Hayward ◽  
N. J. Mcadam ◽  
J. G. Jones ◽  
C. Evans ◽  
G. M. Evans ◽  
...  
Keyword(s):  
Genetic Markers ◽  
Quantitative Traits ◽  
Forage Grasses ◽  
Selection Of
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