Low-cost mobile open-circuit hood system for measuring gas exchange in small ruminants: from manual to automatic recording

Fernández, Carlos; López, M. C.; Lachica, M.

doi:10.1017/s0021859615000416

Cited by 20 publications

(11 citation statements)

References 19 publications

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“…Although the unit was an autocalibrated model, the analyzers were calibrated with reference gases before each test. Fernández et al (2012Fernández et al ( , 2015Fernández et al ( , 2019a described the mobile open-circuit respirometry system used for these measurements. The whole system was calibrated by injecting pure N 2 and CO 2 into the head box (McLean and Tobin, 1987), determined gravimetrically using a precision scale (MOBBA mini-SP 0.2-30 kg, Industrial Weighing System, Barcelona, Spain).…”

Section: Experimental Schedule and Measurementsmentioning

confidence: 99%

Inclusion of lemon leaves and rice straw into compound feed and its effect on nutrient balance, milk yield, and methane emissions in dairy goats

Romero

Pérez-Baena

Larsen

et al. 2020

Journal of Dairy Science

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The objective of this experiment was to study the effects of incorporating lemon leaves and rice straw into the compound feed of diets for dairy goats. Ten Murciano-Granadina dairy goats (n = 5 per group) in mid-lactation were used in a crossover design experiment (2 treatments across 2 periods). Goats were fed a mixed ration with barley grain (control, CON) or CON plus lemon leaves [189 g/kg of dry matter (DM)] and rice straw (120 g/kg of DM) in place of barley grain (LRS). Soybean oil (19 g/kg of DM) was added to the LRS diet to make it isoenergetic (17 MJ of gross energy/kg of DM) relative to CON. After 14 d on their respective treatments, goats were allocated to individual metabolism cages for another 7 d. Subsequently, feed intake, total fecal and urine output, and milk yield were recorded daily over the first 5 d. During the last 2 d, ruminal fluid and blood samples were collected, along with individual gas exchange measurements recorded by a mobile open-circuit indirect calorimetry system using a head box. No differences in DM intake were detected, and ME intake in LRS was lower than in CON (1,095 vs. 1,180 kJ/kg of metabolic body weight). No differences were observed in milk production, but milk fat content was greater in LRS (6.4%) than in CON (5.6%). Greater concentrations of monounsaturated (14.94 vs. 11.96 g/100 g of milk fat) and polyunsaturated fatty acids (4.53 vs. 4.03 g/100 g of milk fat) were detected in the milk of goats fed LRS compared with CON. Atherogenicity (2.68 vs.1.91) and thrombogenic (4.58 vs. 2.81) indices were lower with LRS compared with CON. Enteric CH 4 emission was lower in LRS (24.3 g/d) compared with CON (31.1 g/d), probably due to the greater lipid content and unsaturated fatty acid profile of lemon leaves and the soybean oil added in the LRS diet. Overall, data suggest that incorporating lemon leaves and rice straw into lactating goat diets is effective in reducing CH 4 emissions while allowing improvements in milk fat production and milk thrombogenic index without affecting production performance. Thus, their inclusion in compound feeds fed to small ruminants appears warranted and would have multiple positive effects, as on efficiency of nutrient use, human health, and the environment.

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Section: Experimental Schedule and Measurementsmentioning

confidence: 99%

Inclusion of lemon leaves and rice straw into compound feed and its effect on nutrient balance, milk yield, and methane emissions in dairy goats

Romero

Pérez-Baena

Larsen

et al. 2020

Journal of Dairy Science

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“…Gas analyzer measured O 2 following paramagnetic principle, and CH 4 and CO 2 were measured following the infrared principle (Easyflow Gas Analyzer, model 3020, ABB, Alzenau, Germany). Reference gases were used to calibrate the gas analyzers before each test, and for a deep and detailed explanation of the portable open-circuit respirometry system used in this study it is advisable to consult the following works: Fernández et al [17][18][19]. Further, the entire system was gravimetrically calibrated by injecting pure gas N 2 and CO 2 into the head-hood [20] (precision scale MOBBA mini-SP 0.2-30 kg, Industrial Weighing System, Barcelona, Spain).…”

Section: Experimental Procedures and Samplingmentioning

confidence: 99%

“…Ash concentration (no. 942.05, AOAC [18]) and organic matter (OM) determination were attained by incineration of a sample in an electric muffle furnace at 550 ºC for 6 h. Feed, refusals, and feces were analyzed for neutral detergent fiber (aNDF) and acid detergent fibre (ADF) using the ANKOM Fiber Analyzer (A220, ANKOM Technologies, Fairport, NY, USA). The aNDF was NDF assayed with amylase (heat-stable) and expressed inclusive of residual ash.…”

Section: Chemical Analysismentioning

confidence: 99%

Alterations in Energy Partitioning and Methane Emissions in Murciano-Granadina Goats Fed Orange Leaves and Rice Straw as a Replacement for Beet Pulp and Barley Straw

Romero

Palomares

Moya

et al. 2020

Animals

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Considering the huge quantities of crops by-products and pruning waste such as rice straw and citrus leaves produced annually worldwide, and their potential pollution capacity, recycling as feed for livestock is an alternative. The objective was to study these by-products effect on energy balance and methane emissions in 10 Murciano-Granadina goats at maintenance. The control diet (CTR) included barley straw and beet pulp while the experimental diet (ORG) consisted of rice straw and orange leaves. Differences were found for energy intake (248 kJ/kg of BW0.75 greater for CTR than ORG). The intake of metabolizable energy was 199 kJ/kg of BW0.75 lower in ORG than CTR, and the energy efficiency was higher with CTR (0.61) than ORG (0.48). Protein retained in the body was 9 g/goat greater with CTR than ORG, and fat retention in the body was approximately 108 g/goat greater with CTR than ORG. Despite more unfavorable energy balance in response to feeding ORG than CTR, the retention of body energy was always positive. Reductions in CH4 emissions were detected when goats were fed ORG diet (from 22.3 to 20.0 g/d). Overall results suggested that feeding orange leaves and rice straw was effective in reducing CH4 emissions without adversely affecting energy balance.

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“…Although the unit was an autocalibrated model, the analysers were calibrated with reference gases before each test. Fernández et al (2012Fernández et al ( , 2015 described the mobile open-circuit respirometry system used for these measurements. The whole system was calibrated by injecting pure N 2 into the head box (McLean and Tobin, 1987) and determined gravimetrically using a precision scale.…”

Section: Experimental Schedule and Measurementsmentioning

confidence: 99%

Replacement of alfalfa hay ( Medicago sativa ) with maralfalfa hay ( Pennisetum sp.) in diets of lactating dairy goats

Criscioni

Martí

Pérez-Baena

et al. 2016

Animal Feed Science and Technology

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Low-cost mobile open-circuit hood system for measuring gas exchange in small ruminants: from manual to automatic recording

Abstract: Cambridge University Press (CUP)Fernández Martínez, CJ.; López Luján, MDC.; Lachica, M. (2015). Low-cost mobile opencircuit hood system for measuring gas exchange in small ruminants: from manual to automatic recording. Journal of Agricultural Science. 153(7):1302-1309.

Cited by 20 publications

References 19 publications

Inclusion of lemon leaves and rice straw into compound feed and its effect on nutrient balance, milk yield, and methane emissions in dairy goats

Inclusion of lemon leaves and rice straw into compound feed and its effect on nutrient balance, milk yield, and methane emissions in dairy goats

Alterations in Energy Partitioning and Methane Emissions in Murciano-Granadina Goats Fed Orange Leaves and Rice Straw as a Replacement for Beet Pulp and Barley Straw

Replacement of alfalfa hay ( Medicago sativa ) with maralfalfa hay ( Pennisetum sp.) in diets of lactating dairy goats

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