scholarly journals Thermal efficiency of individual shelters for girolando calves in brazilian semi-arid regions

2016 ◽  
Vol 36 (1) ◽  
pp. 13-23
Author(s):  
Gledson L. P. de Almeida ◽  
Héliton Pandorfi ◽  
Fátima Baptista ◽  
Cristiane Guiselini ◽  
Janice M. C Barnabé
Keyword(s):  
Experimental Design ◽  
Thermal Efficiency ◽  
Thermal Equilibrium ◽  
Thermal Load ◽  
Arid Regions ◽  
Roofing Material ◽  
Fibre Cement ◽  
Roofing Materials ◽  
Semi Arid ◽  
Milk Feeding

ABSTRACT The objective of this research was to evaluate the thermal efficiency of roofs used on individual shelters during milk-feeding stage of Girolando calves. The research was conducted at a farm located in a dry region of Pernambuco state, Brazil. The experimental design was completely randomized, with 27 Holstein × Gir dairy crossbred calves housed in shelters with three roofing materials (fibre cement tile, recycled tile, and thatched roofs). The recycled tiles and thatched roofs provided reductions of 18.7 and 14.6% in radiant thermal load, respectively. Regardless the roofing material, all animals increased their respiratory rate to maintain thermal equilibrium.

Bryophyte species and communities on various roofing materials, Estonia

2021 ◽  
Vol 58 ◽  
Author(s):  
Elle Rajandu ◽  
Tiina Elvisto ◽  
Hanna-Liisa Kappel ◽  
Marko Kaasik
Keyword(s):  
Species Composition ◽  
Rural Areas ◽  
Green Roofs ◽  
Tree Canopy ◽  
Similar Species ◽  
Species Analysis ◽  
Roofing Material ◽  
Species Characteristics ◽  
Fibre Cement ◽  
Roofing Materials

Considering the recent growth of interest in using mosses in creating vegetated green roofs, we set the aim of our study to get an overview of the variety of moss and liverwort species and communities growing spontaneously on roofs. Data were collected from 67 roofs of five different types of materials: fibre cement, bitumen, stone, thatched and steel from Tallinn and rural areas on Hiiumaa Island and in South Estonia. Indicator species analysis, MRPP, cluster analysis and ordination methods (DCA, CCA) were used for data analysis. As a result of this research, generalist bryophytes occurring on all types of roofing materials were studied and bryophyte species characteristics for certain material types were identified. The thatched roofs differed most clearly from the other roof types in their species composition and had the highest species diversity. Stone and fibre cement roofs had similar species composition. The results revealed significant dependence of the composition of the bryophyte flora on roofs on the density of the bryophyte carpet formed over time on the roof and the presence of a tree canopy above the roof. Other important factors were roof relief, the height of the roof from the ground and the indicator of environmental pollution NOx. However, the studied roofs in Tallinn and rural areas did not show significant differences in the species composition of bryophytes. Five communities were delimited: (1) Syntrichia ruralis – Schistidium apocarpum; (2) Orthotrichum speciosum – Bryum argenteum; (3) Brachythecium rutabulum – Hypnum cupressiforme; (4) Ceratodon purpureus – Rhytidiadelphus squarrosus; and (5) Pleurozium schreberi – Dicranum scoparium. The mentioned communities inhabited locations that differed in environmental conditions. The findings of this research can help choose the roofing material and species suitable for a certain location in creating moss greenery on roofs.

scholarly journals Yield of ‘Gigante’ cactus pear cultivated under biofertilizer doses and application intervals

2021 ◽  
Vol 25 (9) ◽  
pp. 633-640
Author(s):  
Varley A. Fonseca ◽  
Carlindo S. Rodrigues ◽  
Rodrigo R. Alvarenga ◽  
Delfran B. dos Santos ◽  
Felizarda V. Bebé ◽  
...  
Keyword(s):  
Experimental Design ◽  
Plant Height ◽  
Arid Regions ◽  
Morphometric Characteristics ◽  
Water Restriction ◽  
Cactus Pear ◽  
Area Index ◽  
Dry Biomass ◽  
Biomass Yields ◽  
Semi Arid

ABSTRACT Due to the water restriction, associated with the high cost of fertilizers, and the need to produce forage in the semi-arid regions, studies using biofertilizers in cactus pear production tend to become impactful. The aim of this study was to evaluate the morphometric characteristics and yield of ‘Gigante’ cactus pear cultivated under doses and application intervals of bovine manure biofertilizer. The experimental design was in randomized blocks, in a 2 × 5 factorial scheme, with two biofertilizer application intervals (14 and 21 days) and five biofertilizer doses (0, 15, 30, 45 and 60 m3 ha-1). Three replicates were used, totaling 30 experimental units. The following variables were evaluated: plant height, number of cladodes, cladode length, cladode width and cladode area index, dry biomass percentage, and green and dry biomass yields. The use of 60 m3 ha-1 of liquid cattle manure biofertilizer increased the yield of ‘Gigante’ cactus pear. The application of 60 m3 ha-1 of biofertilizer at the interval of 14 days increased the yield of ‘Gigante’ cactus pear.

scholarly journals Green manure and spatial arrangement in the sustainability improvement of lettuce-beet intercrops

2018 ◽  
Vol 22 (7) ◽  
pp. 451-457 ◽  
Author(s):  
Ítalo N. Silva ◽  
Francisco Bezerra Neto ◽  
Aurélio P. Barros Júnior ◽  
Jailma S. S. de Lima ◽  
Thaíza M. de V. Batista ◽  
...  
Keyword(s):  
Experimental Design ◽  
Green Manure ◽  
Arid Regions ◽  
Production Systems ◽  
Spatial Arrangement ◽  
Sustainability Indicators ◽  
Economic Sustainability ◽  
Vegetable Crops ◽  
Different Levels ◽  
Semi Arid

ABSTRACT Beet and lettuce are industrial vegetable crops valued for their high mineral, vitamin and fiber contents and for their additional health benefits. These crops are usually grown in intercrops in family production systems in a sustainable manner in semi-arid regions. This work aimed to evaluate the effects of incorporating different levels of hairy woodrose, as a green manure, on the agro-economic sustainability indicators of lettuce-beet intercrops, planted in different spatial arrangements and involving two successive croppings. The experimental design was a randomized complete blocks with treatments arranged in a 4 x 3 factorial scheme, corresponding to four hairy woodrose levels incorporated into the soil (6, 19, 32 and 45 t ha-1, dry basis) and three spatial arrangements between the component crops (2:2, 3:3 and 4:4), with four replications. The optimized agroeconomic performance of lettuce-beet intercropping was achieved with the incorporation of approximately 35.30 t ha-1 hairy woodrose. The lettuce crop contributed significantly to the productivity efficiency and sustainability of the intercropping with beet, compared to the single vegetable crops. The spatial arrangements between component crops did not affect the agroeconomic performance of the lettuce intercropped with beet.

scholarly journals Efficiency of use of supplementary lighting in rearing of dairy calves during milk feeding stage

2015 ◽  
Vol 19 (10) ◽  
pp. 989-995 ◽  
Author(s):  
Gledson L. P. de Almeida ◽  
Héliton Pandorfi ◽  
Fátima Baptista ◽  
Cristiane Guiselini ◽  
Vasco F. da Cruz ◽  
...  
Keyword(s):  
Experimental Design ◽  
The Other ◽  
Dairy Calves ◽  
Feeding Period ◽  
Light Duration ◽  
Supplementary Lighting ◽  
The Cost ◽  
Roofing Materials ◽  
Average Consumption ◽  
Milk Feeding

ABSTRACTThe objective of this study was to evaluate programs of supplementary lighting for calves in individual shelters with different roof materials, as a strategy to stimulate concentrate consumption and the reduction of the milk feeding period and increase financial viability. Twenty seven dairy crossed Holstein × Gir female calves were randomly distributed in individual shelters with three different roofing materials (cement fiber tile, recycled tile and thatched roofs), associated with three different light duration (12, 16 and 20 h) and with three repetitions. The experimental design was completely randomized in 3 × 3 factorial arrangement. There was no interaction between the types of roofs × supplemental light; also, there was no significant effect of the covering types on the average consumption of concentrate and occurance of diarrhea in calves. On the other hand 20 h of lighting stimulated the consumption of concentrate and allowed weaning of calves at 55 days of age and 20% reduction in the cost of rearing animals during milk feeding stage.

scholarly journals Concentrate intake and performance of dairy calves subjected to programs of supplementary lighting

2017 ◽  
Vol 47 (9) ◽  
Author(s):  
Gledson Luiz Pontes de Almeida ◽  
Héliton Pandorfi ◽  
Fátima Baptista ◽  
Cristiane Guiselini ◽  
Marcelo de Andrade Ferreira ◽  
...  
Keyword(s):  
Exposure Time ◽  
Light Exposure ◽  
Dairy Calves ◽  
Randomized Design ◽  
Roofing Material ◽  
Completely Randomized Design ◽  
And Performance ◽  
Supplementary Lighting ◽  
Roofing Materials ◽  
Milk Feeding

ABSTRACT: This research aimed to assess Girolando calves’ concentrate intake and performance when placed in shelters with distinct roofing materials and programs of supplementary lighting during the milk-feeding stage. In order to so, we used a completely randomized design with a 3×3 factorial arrangement, with three replications. Females Girolando calves (n=27) were assigned in individual shelters at random with 3 different roofing materials (fiber cement tile, recycled tile and thatched roofs) and subjected to three lighting programs (12, 16 and 20 hours). No interaction was observed between roofing material and lighting programs, whilst no significant effect (P>0.05) was observed among the roofing materials. The supplementary lighting, by providing greater light exposure time, has stimulated intake and therefore, significantly affected (P<0.05) the concentrate intake and performance of the animals that were subjected to 20 hours of light.

BIODIVERSITY OF HALOPHYTES IN SEMI-ARID REGIONS CASE OF ZAHREZ GHARBI AND ZAHREZ CHERGUI (ZAAFRANE-DJELFA) IN ALGERIA

2020 ◽  
Vol 76 (11) ◽  
Author(s):  
Senni Rachida ◽  
De Belair Gerard ◽  
Abdelkrim Hacene
Keyword(s):  
Arid Regions ◽  
Semi Arid

Water Resources Management in the Semi-Arid Central Valley of California

1987 ◽  
Vol 19 (9) ◽  
pp. 97-106
Author(s):  
J. J. Vasconcelos
Keyword(s):  
Resource Management ◽  
Ground Water ◽  
Water Resource ◽  
Water Resource Management ◽  
Arid Regions ◽  
Central Valley ◽  
The United States ◽  
Policy Makers ◽  
Ground Water Resource ◽  
Semi Arid

Hater resource managers in semi-arid regions are faced with some unique problems. The wide variations in precipitation and stream flows in semi-arid regions increase man's dependence on the ground water resource for an ample and reliable supply of water. Proper management of the ground water resource is absolutely essential to the economic well being of semi-arid regions. Historians have discovered the remains of vanished advanced civilizations based on irrigated agriculture which were ignorant of the importance of proper ground water resource management. In the United States a great deal of effort is presently being expended in the study and control of toxic discharges to the ground water resource. What many public policy makers fail to understand is that the potential loss to society resulting from the mineralization of the ground water resource is potentially much greater than the loss caused by toxic wastes discharges, particularly in developing countries. Appropriations for ground water resource management studies in developed countries such as the United States are presently much less than those for toxic wastes management and should be increased. It is the reponsibility of the water resource professional to emphasize to public policy makers the importance of ground water resource management. Applications of ground water resource management models in the semi-arid Central Valley of California are presented. The results demonstrate the need for proper ground water resource management practices in semi-arid regions and the use of ground water management models as a valuable tool for the water resource manager.

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