Avaliação do microclima da área de pasto de ovinos em Sistema Semi-Confinado do Instituto Federal do Amapá – parte 2 / Evaluation of the microclimate of the sheep grazing area in a Semi-Confined System at the Federal Institute of Amapá - part 2

2021 ◽  
Vol 7 (7) ◽  
pp. 74925-74935
Author(s):  
Osvaldo Campelo de Mello Vasconcelos ◽  
Alyne Cristina Sodré Lima ◽  
Caroline Pessoa Da Silva ◽  
João Maria Do Amaral Junior ◽  
Carlos Henrique Lima De Matos ◽  
...  
Keyword(s):  
Sheep Grazing ◽  
Federal Institute ◽  
Grazing Area ◽  
Confined System

Sheep grazing techniques when aftermaths are not available

1986 ◽  
Vol 1986 ◽  
pp. 81-81
Author(s):  
D. C. Brown
Keyword(s):  
Grazing Management ◽  
Barley Straw ◽  
List Type ◽  
Type Number ◽  
Stocking Rate ◽  
Sheep Grazing ◽  
Grazing Season ◽  
Creep Feed ◽  
Grazing Area

Silage aftermaths have been used to reduce the stocking rate of the flock in mid season when the lambs are eating more grass. When straw is fed as the only source of roughage to housed pregnant ewes, aftermaths are not available so different grazing management may be required. 1.29 ewes and their lambs grazed initially at 22 ewes/ha reducing to 15 ewes/ha when aftermaths become available (control).2.29 ewes and their lambs grazed 8t 22 ewes/ha set stocked through the grazing season.3.29 ewes and their lambs grazed at 22 ewes/ha set stocked throughout the grazing season and creep feed offered to the lambs.4.29 ewes and their lambs grazed at 22 ewes/ha set stocked throughout the grazing and ammonia treated ’ barley straw offered to the ewes and lambs.Two days after lambing in mid March, the ewes and lambs were turned onto their plots. Each treatment consisted of 22 ewes with twin lambs and 7 ewes with single lambs. Concentrates were fed to the ewes at grass until April 30. On 4 June 1984 the stocking rate for treatment 1 was reduced to 15 ewes/ha when silage aftermaths became available. The grazing area of all treatments received 125 kg/ha N in 3 equal applications during the grazing season.

scholarly journals Dieldrin and Diazinon Resistance in Populations of the Australian Sheep Blowfly, Lucilia cuprina, from Sheep-grazing Areas and Rubbish Tips

1984 ◽  
Vol 37 (6) ◽  
pp. 367 ◽  
Author(s):  
JA McKenzie
Keyword(s):  
Gene Flow ◽  
Allele Frequency ◽  
New South ◽  
Resistance Locus ◽  
Sheep Grazing ◽  
Gene Frequencies ◽  
South Wales ◽  
Australian Sheep ◽  
Grazing Area ◽  
Similar Gene

Populations of L. cuprina collected from adjacent sheep-grazing areas and rubbish tips in Victoria (Mansfield and Warrnambool) and New South Wales (Lismore) were tested for resistance to the insecticides diazinon and dieldrin. Populations from sheep-grazing areas had a significantly higher diazinon Rop-l allele frequency than those from adjacent tips with the Victorian populations being more resistant than those from Lismore. Victorian sheep and tip populations had similar gene frequencies at the dieldrin resistance locus, but the Rdl allele frequency was significantly greater in the population at the tip than in the population from the sheep-grazing area at Lismore. The Rdl allele is at a higher frequency in flies from the Lismore area than in Victorian populations. The results at both loci are explained by a balance of selection and gene flow between sheep and tip populations and by selective differences between geographical areas.

Avaliação do microclima do Aprisco elevado de ovinos em sistema Semi-Confinado do Instituto Federal do Amapá – parte 1 / Evaluation of the microclimate of the raised Sheepfold in a Semi-Confined system at the Federal Institute of Amapá - part 1

2021 ◽  
Vol 7 (7) ◽  
pp. 74912-74924
Author(s):  
Osvaldo Campelo de Mello Vasconcelos ◽  
Alyne Cristina Sodré Lima ◽  
Caroline Pessoa Da Silva ◽  
João Maria Do Amaral Junior ◽  
Carlos Henrique Lima De Matos ◽  
...  
Keyword(s):  
Federal Institute ◽  
Confined System

Regulatory and sustainability initiatives lead to improved polyaminopolyamide epichlorohydrin (PAE) wet-strength resins and paper products

TAPPI Journal ◽  
2018 ◽  
Vol 17 (09) ◽  
pp. 519-532 ◽  
Author(s):  
Mark Crisp ◽  
Richard Riehle
Keyword(s):  
Health And Safety ◽  
Cost Effective ◽  
Worker Safety ◽  
Regulatory Requirements ◽  
Wet Strength ◽  
The Past ◽  
Consumer Safety ◽  
Federal Institute ◽  
Sustainability Initiatives ◽  
The Impact

Polyaminopolyamide-epichlorohydrin (PAE) resins are the predominant commercial products used to manufacture wet-strengthened paper products for grades requiring wet-strength permanence. Since their development in the late 1950s, the first generation (G1) resins have proven to be one of the most cost-effective technologies available to provide wet strength to paper. Throughout the past three decades, regulatory directives and sustainability initiatives from various organizations have driven the development of cleaner and safer PAE resins and paper products. Early efforts in this area focused on improving worker safety and reducing the impact of PAE resins on the environment. These efforts led to the development of resins containing significantly reduced levels of 1,3-dichloro-2-propanol (1,3-DCP) and 3-monochloropropane-1,2-diol (3-MCPD), potentially carcinogenic byproducts formed during the manufacturing process of PAE resins. As the levels of these byproducts decreased, the environmental, health, and safety (EH&S) profile of PAE resins and paper products improved. Recent initiatives from major retailers are focusing on product ingredient transparency and quality, thus encouraging the development of safer product formulations while maintaining performance. PAE resin research over the past 20 years has been directed toward regulatory requirements to improve consumer safety and minimize exposure to potentially carcinogenic materials found in various paper products. One of the best known regulatory requirements is the recommendations of the German Federal Institute for Risk Assessment (BfR), which defines the levels of 1,3-DCP and 3-MCPD that can be extracted by water from various food contact grades of paper. These criteria led to the development of third generation (G3) products that contain very low levels of 1,3-DCP (typically <10 parts per million in the as-received/delivered resin). This paper outlines the PAE resin chemical contributors to adsorbable organic halogens and 3-MCPD in paper and provides recommendations for the use of each PAE resin product generation (G1, G1.5, G2, G2.5, and G3).

THE PERFORMANCE OF S170 TALL FESCUE IN CANTERBURY

1974 ◽  
pp. 214-215
Author(s):  
B.R. Watkin
Keyword(s):  
New Zealand ◽  
White Clover ◽  
Tall Fescue ◽  
Trifolium Repens ◽  
Festuca Arundinacea ◽  
Sheep Grazing ◽  
Selection Of

AN Aberystwyth selection of tall fescue (Festuca arundinacea Schreb.), known as S170, was sown with certified New Zealand white clover (Trifolium repens) and re' clover (T. pratense) and compared under sheep grazing with other grass/clover pastures at the Grasslands Division Regional Station at Lincoln (Watkin, 1975) .

A REVIEW OF 10 YEARS' RESEARCH WITH RED CLOVERS UNDER GRAZING IN SOUTHLAND

1989 ◽  
pp. 181-187
Author(s):  
R.J.M. Hay ◽  
D.L. Ryan
Keyword(s):  
Tall Fescue ◽  
Red Clover ◽  
Farming Systems ◽  
Seasonal Growth ◽  
Sheep Grazing ◽  
High Quality ◽  
Late Flowering ◽  
Heavy Weight ◽  
Widespread Acceptance ◽  
Summer Growth

In a series of trials at Grasslands Gore, over 10 years, the late-flowering tetraploid red clover 'Grassland Pawera' was more productive and persistent than other red clover cultivars. The strong summer growth of Pawera meets the need for heavy-weight lamb feed and high quality forage for conservation in intensive sheep farming systems in Southland. Lenient. infrequent defoliation is necessary to maximise DM production and persistence of Pawera. The most compatible of the grasses evaluated was 'Grasslands Roa' tall fescue. However, 'Grasslands Nui' ryegrass will still be the major grass sown with Pawera owing to its widespread acceptance. In ryegrass mixtures, sowing rates of 5-7 kg/ha of red clover were needed to optimise establishment and subsequent yield. Evidence of oestrogenic activity of Pewera to sheep prompted Grasslands Division to select within Pawera for a low formononetin cultivar. Keywords: red clover, Pawera. Hamua, Turoa. G21. G22, G27. oestrogenic activity, Nui ryegrass, Roa tall fescue, Maru phalaris. Southland, sheep grazing, frequency, intensity, quality. seasonal growth

THE ECONOMICS OF FORESTRY VERSUS PASTURE

1971 ◽  
pp. 18-25
Author(s):  
J.B. Jackman
Keyword(s):  
Sheep Grazing ◽  
Farm Forestry ◽  
Tax Returns

The post-tax returns/acre/annum of farm woodlot scale forestry are compared with sheep siocked at 5 stock units/acre. The results are presented as a break-even timber value. This is the paint at which returns from forestry and farming are equal, thereby implying that farm forestry would be more profitable than sheep grazing at timber values above the breakeven.

Die Brutvogelfauna eines Nadelwaldes der nördlichen Voralpen nach dem Sturm Lothar

2017 ◽  
Vol 168 (2) ◽  
pp. 59-66
Author(s):  
Pierre Mollet ◽  
René Hardegger ◽  
Res Altwegg ◽  
Pius Korner ◽  
Simon Birrer
Keyword(s):  
Forest Succession ◽  
Coniferous Forest ◽  
Bird Species ◽  
Individual Species ◽  
Mountain Forest ◽  
Breeding Bird ◽  
Point Counts ◽  
Federal Institute ◽  
Central Switzerland ◽  
Bird Fauna

Breeding bird fauna in a coniferous forest in the northern Prealps after storm Lothar In a 70-hectare large coniferous forest located on the northern edge of the Alps in central Switzerland, Canton of Obwalden, at an altitude of 1260 to 1550 metres above sea level, we surveyed the local breeding bird fauna in 2002 and 2013 by means of point counts as well as additional area searches for rare species. In December 1999, hurricane Lothar caused two large windthrow areas and several smaller areas with scattered throws in the survey range. We found a total of 48 breeding bird species, which is a very diverse species composition for a mountain forest. In the eleven years between surveys, a decline in distribution or abundance was recorded for four species, while seven species showed an increase; a further four species showed no change. For the remaining species, the data sets were too small to reliably estimate changes. A comparison with forest structure data provided by the Swiss Federal Institute of Forest, Snow and Landscape Research WSL revealed that for five bird species, the changes in distribution or abundance could be explained at least partially by forest succession. In order to obtain realistic distribution and abundance values in this kind of breeding bird survey, it is essential to collect large enough samples and to consider the detection probability of each individual species using appropriate statistical methods.

Der Binding Waldpreis – Auslöser für waldbaulich-ertragskundliche Forschung | The Binding Forest Award initiates silvicultural and yield research

2011 ◽  
Vol 162 (3) ◽  
pp. 65-70
Author(s):  
Andreas Zingg ◽  
Hansheinrich Bachofen
Keyword(s):  
Forest Ecosystems ◽  
Swiss Federal Institute ◽  
Growth And Yield ◽  
High Quality ◽  
Federal Institute ◽  
Ecological Values ◽  
Prize Award ◽  
Landscape Research ◽  
Selection Forest ◽  
Time Required

Between 1995 and 2008 the granting of the Binding Forest Award led to fresh cooperation between forest owners and research on silviculture, growth and yield at the Swiss Federal Institute for Forest, Snow and Landscape Research. Various topics were treated: a study of the beech coppices in Rothenfluh rapidly made it clear that very little was known about this formerly widespread type of forest management and its consequences. The same was true to a lesser extent for the conversion of rather uniform high forest into selection forest (in Plasselb), and for the selective management of light demanding tree species, such as the oak, in Rheinau. In Boudry, cooperation between practice and research already existed: the prize award here led to new approaches in the production of high quality oak, whilst taking ecological values into account. All these new projects are still in their earliest stages and will call for a great deal of “sustainability”, in both senses of the word, from all those involved. Considering the long periods of time required for the development of forest ecosystems, this is in fact self-evident.

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