Palisadegrass pastures with or without nitrogen or mixed with forage peanut grazed to a similar target canopy height. 2. Effects on animal performance, forage intake and digestion, and nitrogen metabolism

2021 ◽  
Author(s):  
Bruno G. C. Homem ◽  
Italo Braz G. Lima ◽  
Paola P. Spasiani ◽  
Lucas P. C. Borges ◽  
Robert M. Boddey ◽  
...  
Keyword(s):  
Nitrogen Metabolism ◽  
Canopy Height ◽  
Animal Performance ◽  
Forage Intake

Forage intake, milk yield and composition of cows in a silvopastoral system with and without access to the forage tree and energy supplementation during the rainy season

2007 ◽  
Vol 2007 ◽  
pp. 199-199
Author(s):  
V. Valdivia ◽  
C.A. Sandoval-Castro ◽  
K. Otaduy ◽  
J.C. Ku-Vera
Keyword(s):  
Milk Yield ◽  
Rainy Season ◽  
Silvopastoral Systems ◽  
Animal Performance ◽  
Silvopastoral System ◽  
Dual Purpose ◽  
Lactating Cows ◽  
Forage Intake ◽  
Energy Supplementation ◽  
Grass Growth

The improvement in animal performance obtained in silvopastoral systems has been explained either by their ingestion of a higher quality grass (Hernandez et al., 2001, Iglesias, 1998) resulting from the inclusion of a legume in the system which provide N for grass growth or due to the intake of the legume itself, which in turn is also of higher quality than grass. During the rainy season, animals might be able to increase selectivity and intake due to the higher availability of biomass hence possibly reducing the advantage of including a legume in the system. The objective of the present work was to discriminate in a silvopastoral system the effect of improved grass quality and legume intake on dual purpose lactating cows milk yield and composition.

Effects of supplementation on voluntary forage intake, diet digestibility, and animal performance

1999 ◽  
Vol 77 (suppl_2) ◽  
pp. 122 ◽  
Author(s):  
J. E. Moore ◽  
M. H. Brant ◽  
W. E. Kunkle ◽  
D. I. Hopkins
Keyword(s):  
Animal Performance ◽  
Forage Intake

The effects of level of nitrogen fertiliser application to silage swards on subsequent silage composition, intake and animal performance of lactating dairy cattle

1995 ◽  
Vol 1995 ◽  
pp. 23-23
Author(s):  
T. W. J. Keady ◽  
J. J. Murphy ◽  
S. Fitzgerald
Keyword(s):  
Dairy Cattle ◽  
Water Soluble ◽  
Soluble Carbohydrate ◽  
Animal Performance ◽  
Performance Information ◽  
Forage Intake ◽  
High Concentrations ◽  
Fertiliser Application ◽  
Water Soluble Carbohydrate ◽  
Lactating Dairy Cattle

Applications of high concentrations of fertiliser nitrogen (N) to silage swards are known to alter the chemical composition of herbage by increasing crude protein (CP), decreasing dry matter (DM) and altering water soluble carbohydrate (WSC) concentrations. Many studies have illustrated that increasing the CP concentrations of concentrates increases silage intake. However, there is little data available to illustrate the effects, if any, of silage CP concentration on forage intake and animal performance. Information is also lacking on the value of silage CP relative to concentrate CP in terms of animal performance. Therefore the present study was initiated, using different levels of formic acid to equalise fermentation, to evaluate the effects of N fertiliser on silage CP concentration, forage intake, digestibility and animal performance of lactating dairy cattle. It also provided an opportunity to compare the value of silage CP to that obtained from concentrate.

185 Opportunities and Challenges of Conducting Grazing Experiments in Pasturelands

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 99-100
Author(s):  
Joao Vendramini ◽  
Lynn Sollenberger ◽  
Maria Lucia L Silveira
Keyword(s):  
Ecosystem Services ◽  
Nutritive Value ◽  
Task Force ◽  
Influential Factors ◽  
Experimental Unit ◽  
Animal Performance ◽  
Intrinsic Variability ◽  
Forage Intake ◽  
Value Determination

Abstract Grasslands cover approximately 30% of the world area and research conducted in pasturelands has been crucial to realize the benefits of grassland contributions to livestock production and ecosystem services. The Forage and Grazing Terminology Task Force has developed a list of recommended nomenclature for grazing lands research and this effort has been a landmark to avoid misleading terms in research reports. Other challenges remain. The intrinsic variability of pastureland research data limits the capacity of researchers to detect differences among treatments. In addition, the quantity of resources and labor required by pastureland experiments may lead researchers to decrease the size of experimental units and/or number of replicates, exacerbating the limitations in detecting differences among treatments. In general, experimental units in grazing studies encompass relatively large areas, which may pose a challenge to identifying representative sampling units that reflect the experimental area. The use of indirect measurements to estimate forage mass is a feasible approach to increase the representativeness of forage quantity evaluations. The nutritive value determination of forage samples from grazing studies also has many limitations. The collection of samples representing the animal diet and the methods of nutritive value determination, primarily digestibility, are major areas of concern. For animal performance evaluations, determination of the correct experimental unit has been a frequent issue. Among animal measures, forage intake is one of the most influential factors affecting animal performance and the existent methodology to estimate forage intake by grazing animals has limitations, reducing the accuracy of the results. Development and validation of mathematical models to estimate the benefits of grasslands on livestock performance and ecosystem services are important steps in the evolution of grassland science, but in some cases additional data are needed to support this effort.

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.

Diethylstilbestrol and Length of Preliminary Period in the Utilization of Crude Biuret and Urea by Lambs. II. Various Aspects of Nitrogen Metabolism

1960 ◽  
Vol 19 (1) ◽  
pp. 44-53 ◽  
Author(s):  
G. A. McLaren ◽  
G. C. Anderson ◽  
J. A. Welch ◽  
C. D. Campbell ◽  
G. S. Smith
Keyword(s):  
Nitrogen Metabolism
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