Consulta: subjectFacets:"Net energy"
Registros recuperados: 9
Data/hora: 01/06/2024 01:49:27

Net energy evaluation of feeds and determination of net energy requirements for pigs
Provedor de dados: 96
Autores: Noblet,Jean.
Feeds for pigs can be attributed different energy values according to, first, the step considered in energy utilization (DE: digestible energy, ME: metabolizable energy and NE: net energy) and, second, the method used for estimation at each step. Reference methods for evaluating DE content are based on in vivo digestibility measurements; indirect estimates of DE values are obtained from in vitro methods or prediction equations based on chemical characteristics. Methods have also been proposed for estimating urinary energy (and gas energy to a smaller extent) in order to calculate ME content from DE value. The NE values originate from energy balance studies (slaughter methods or, more commonly, indirect calorimetry measurements in respiration chambers) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy requirement; Energy value; Heat production; Net energy; Pig.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007001000025

Estimation of the total efficiency of metabolizable energy utilization for maintenance and growth by cattle in tropical conditions
Provedor de dados: 96
Autores: Henrique,Douglas Sampaio; Vieira,Ricardo Augusto Mendonça; Malafaia,Pedro Antônio Muniz; Mancini,Maurício Cordeiro; Gonçalves,André Luigi.
Data of 320 animals were obtained from eight comparative slaughter studies performed under tropical conditions and used to estimate the total efficiency of utilization of the metabolizable energy intake (MEI), which varied from 77 to 419 kcal kg-0.75d-1. The provided data also contained direct measures of the recovered energy (RE), which allowed calculating the heat production (HE) by difference. The RE was regressed on MEI and deviations from linearity were evaluated by using the F-test. The respective estimates of the fasting heat production and the intercept and the slope that composes the relationship between RE and MEI were 73 kcal kg-0.75d-1, 42 kcal kg-0.75d-1 and 0.37. Hence, the total efficiency was estimated by dividing the net energy for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergetics; Growth; Net energy; Ruminants.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982005000300034

Energy nutritional requirements for females of Nellore, Nellore × Angus and Nellore × Simmental fed on two forage: concentrate ratios
Provedor de dados: 96
Autores: Souza,Evaristo Jorge Oliveira de; Valadares Filho,Sebastião de Campos; Guim,Adriana; Valadares,Rilene Ferreira Diniz; Marcondes,Marcos Inácio; Véras,Antonia Sherlânea Chaves; Amaral,Paloma de Melo; Santos,Tathyane Ramalho.
The objective of this study was to determine the energy nutritional requirements for females of Nellore, Nellore × Angus and Nellore × Simmental fed on two levels of concentrate. Sixty heifers from three genetic groups were used: 20 Nellore, 20 Nellore × Angus and 20 Nellore × Simmental. Twelve belonged to the reference group (four of each genetic group) and were slaughtered at the beginning of the experiment. Another 12 heifers (four of each genetic group) were fed on the maintenance level and 36 heifers (12 animals of each genetic group) were kept in feeding system ad libitum with 30 (six in each group) or 50% (six of each group) dry matter concentrate. Animals were randomly assigned to six treatments in a 3 × 2 factorial arrangement (three genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crossbred heifers; Maintenance; Metabolizable energy; Net energy.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300039

Nutritional requirements of energy, protein and macrominerals for maintenance and weight gain of young crossbred Nellore × Holstein bulls on pasture
Provedor de dados: 96
Autores: Porto,Marlos Oliveira; Paulino,Mário Fonseca; Valadares Filho,Sebastião de Campos; Detmann,Edenio; Cavali,Jucilene; Sales,Maykel Franklin Lima; Valente,Ériton Egidio Lisboa; Couto,Victor Rezende Moreira.
The objective of this study was to estimate requirements of energy, protein and macrominerals of young Nellore/Holstein crossbreds bulls supplemented on pastures of Brachiaria decumbens Stapf. Thirty-five young bulls, at 8.53±0.18 months of age and with initial body weight of 230.6±6.1 kg were used. Ten animals were slaughtered as reference, in different weight range, and the other animals were slaughtered at the end of the experimental period. For estimate of net energy requirements for weight, a regression equation between log of retained energy (RE) and log of empty body weight gain (EBWG) was constructed. Net requirements of Ca, P, Mg, Na and K were determined by the equation Y' = a.b.Xb-1, in which a and b represent the intercept and the coefficient...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Multiple supplements; Net energy; Supplementation; Zebu.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300037

ศักยภาพของการใช้โปรตีนก้อนเพื่อทดแทนอาหารข้นในโคนม
Provedor de dados: 106
Autores: Jiraporn Odton; Choke Mikled; Nattaphon Chongkasikit.
Study was conducted to evaluate the chemical composition of Protein Block (PB) I, II and concentrate. The result of chemical analysis were showed that the dry matter (DM) 94.54, 93.48 and 89.16 percent; crude protein (CP) 45.85, 41.41 and 15.41 percent; crude fiber (CF) 4.26, 1.90 and 3.36 percent; ash 25.38, 26.99 and 6.36 percent; and ether extract (EE) 8.58, 1.18 and 4.98 percent, respectively. Nutrients digestibility and energy contents were studied by gas production technique. The predication values of organic matter digestibility of protein block I, protein block II and concentrate residue were 84.56 ± 5.08, 75.41 ± 2.68 and 114.86 ± 0.89 percent, metabolizable energy (ME) 7.65 ± 1.30, 8.33 ± 1.61 and 9.89 ±1.19 MJ/kg and net energy for lactation...
Tipo: Collection
Palavras-chave: Protein block; Concentrate; Matabolizable energy; Net energy; Lactation; โคนม; โปรตีนก้อน; อาหารข้น; องค์ประกอบทางเคมี; พลังงานที่ใช้ประโยชน์ได้; พลังงานสุทธิเพื่อการให้นม; ปริมาณน้ำนม.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5175

Effect of enzyme addition on energy utilization and performance of broiler chickens fed wheat-based diet with different metabolizable energy levels
Provedor de dados: 2
Autores: Moftakharzadeh, Seyed adel; Janmohammadi, Hossein; Taghizadeh, Akbar; Kianfar, Ruhollah; Olyayee, Majid Geshlog.
An experiment was carried out to investigate the effect of multi-enzyme in high and low levels of metabolizable energy (13.81 and 11.51 MJ kg-1 diet) on performance and energy utilization of broilers fed wheat-soybean meal diets from 0 to 21 days of age. Result showed that birds fed diets containing 11.51 MJ kg-1 consumed significantly (p &lt; 0.05) more feed than diets containing 13.81 MJ kg-1, whereas daily gain and feed conversion ratio improved (p &lt; 0.05) when enzyme was added to 11.51 MJ kg-1 diet. There was significant improvement in metabolizable energy, net energy for production, organic and dry matter digestibility in 0-21 when diets supplemented with enzyme (p &lt; 0.05). Addition of enzyme to 11.51 MJ kg-1 containing diet significantly (p...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enzyme; Net energy; Wheat; Body composition; Broilers.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/44585

Energy analysis of three energy crops in Greece
Provedor de dados: 111
Autores: Gemtos, T. A.; Cavalaris, C.; Tagarakis, A.; Fountas, S.
To assess the potential of energy crops to provide a stock material for biofuel production three crops (rapeseed, sunflower and sweet sorghum) were studied in field experiments in Thessaly, Central Greece in 2007 and 2008.  The cropping activities were recorded.  Energy analysis was carried out to assess benefits from the crops.  Power requirements and energy consumption during field operations were measured directly using instrumented tractors.  Literature data was used for the energy sequestered to the inputs of the system (indirect energy).  Energy budgets were produced taking into account as output either the seed or including the stalks for the two oil seed crops.  The results showed that in all cases positive energy balances were achieved.  Analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural engineering rape seed; Sunflower; Sweet sorghum; Energy analysis; Net energy; Energy efficiency coefficient.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2244

PROFITABILITY AND ENERGY GAPS OF SEMI-MECHANISED AND TRADITIONAL RICE PRODUCTION TECHNOLOGIES IN NORTH CENTRAL AND NORTH WESTERN NIGERIA
Provedor de dados: 111
Autores: Yusuf, Oladimeji Usman.
Efficient use of energies on crop production helps to achieve increased production and productivity as well as profitability and competitiveness of agricultural sustainability of rural communities. The study examined profitability and energy used of rice production under two different technologies in two States of Nigeria. Primary data through structured questionnaire and interview were administered to 265 rice farmers comprising 57 semi-mechanized (Group 1) and 208 traditional (Group 2) rice farmers in both States. Results revealed that the semi-mechanized had higher income ₦370998.2 ($2348.1) per ha compared to ₦307031.1 ($1943.2) per ha from traditional technology. Group 1 farmers produce a total energy output 54842.8 MJ ha-1 (3.7 tons) compared to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Watermelon; Net energy; Efficiency; Net margin.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4299

Energy partitioning and methane emission by sheep fed sorghum silages at different maturation stages
Provedor de dados: 45
Autores: Machado,F.S.; Rodríguez,N.M.; Gonçalves,L.C.; Rodrigues,J.A.S.; Ribas,M.N.; Pôssas,F.P.; Jayme,D.G.; Pereira,L.G.R.; Chaves,A.V.; Tomich,T.R.
Energy partitioning and methane production by sheep fed silages of three commercially available sorghum hybrids (BRS 610, BR 700 and BRS 655) harvested at three maturation stages (milk, soft dough and floury) were evaluated in open circuit respiration chambers. A complete randomized design was used in a 3 × 3 (hybrids × maturity stages) factorial arrangement, and the means were compared by the Student-Newman-Keuls (SNK) test (P&lt;0.05). The intake of dry matter, digestible dry matter, gross energy, digestible energy and metabolizable energy were not affected by maturation stage, but were influenced by hybrid. The net energy intake was influenced by maturity and sorghum genetics. The fecal output represented the main source of energy loss, as percentage of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Greenhouses gas; Nutritional value; Net energy; Respirometry.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000300790