User contributions for Lbenzoni

14 February 2024

• 20:3520:35, 14 February 2024 diff hist +201‎ N Section 20: Discussion of methods ‎ Created page with "* SF6 vs Respiration chamber * Breath sampling during milking and feeding vs Respiration chamber * NDIR vs LMD * Greenfeed * Laser Methane Detector" Tag: Visual edit
• 20:2520:25, 14 February 2024 diff hist +551‎ Section 20: Methane measuring methods ‎No edit summary Tag: Visual edit
• 20:2220:22, 14 February 2024 diff hist +2,086‎ N Section 20: Conclusions ‎ Created page with "Measuring CH4 emission on large numbers of cows is a challenge. The high costs and low throughput of RC restrict their use to research studies measuring CH4 emissions on small numbers of individual animals. Respiration chambers remain the gold standard method, but benchmarking alternative methods against RC is challenging because simultaneous replicate measures per cow are not feasible. Methods like SF6 and GreenFeed require lower capital investment and running costs tha..." Tag: Visual edit
• 20:2120:21, 14 February 2024 diff hist +1,860‎ N Section 20: Merging and sharing data in genetic evaluations ‎ Created page with "Early 2016 an attempt to make cross country evaluations of CH4 emissions from Holstein dairy cattle was initiated. The work was based on data from NL, DK, AUS, UK and IR. In total, 12,820 weekly CH4 emission records from 2,857 cows were available. Although different equipment was used across countries to measure CH4 emissions, the research aimed to define similar CH4 output phenotypes in each country. The analysed CH4 traits, that are available in each country, are (1) C..." Tag: Visual edit
• 20:1920:19, 14 February 2024 diff hist +832‎ N Section 20: Recommendations ‎ Created page with "The most important question: what method to use if you need to measure CH4? The answer may be: it depends on what you like to do. In the Table 7 we summarize some experimental conditions and designs, and make recommendations. {| class="wikitable" |+ !Experimental condition and design !Methane measurement method recommendation |- |Need to measure absolute methane values – animal numbers and location not important |Respiration chamber; SF6; GreenFeed |- |Need to rank ani..." Tag: Visual edit
• 20:1420:14, 14 February 2024 diff hist +1,817‎ N Section 20: Methane measuring methods ‎ Created page with "Several factors influence the choice of measurement method such as cost, level of accuracy, precision, scope of application, and scale, which vary across disciplines (Cassandro et al., 2013; Hammond et al., 2016A; Garnsworthy et al., 2019). For instance, genetic selection programs require CH4 measurements on thousands of related individuals under the environmental conditions in which the animals are expected to perform (Falconer and Mackay, 1996). This can be challenging..." Tag: Visual edit
• 20:1420:14, 14 February 2024 diff hist +923‎ N Laser Methane Detector ‎ Created page with "The laser CH4 detector (LMD) is a highly responsive, hand-held device that is pointed at an animal’s nostrils and measures CH4 column density along the length of the laser beam (ppm.m). In the first implementation of LMD on a farm, measurements for each cow were taken over periods of 15 to 25 seconds between eructation events and could detect CH4 emitted each time the animal breathed out (Chagunda et al., 2009 Sorg et al., 2016, 2017). In a later study with sheep and b..." Tag: Visual edit
• 20:1220:12, 14 February 2024 diff hist +2,405‎ N Greenfeed ‎ Created page with "GreenFeed (C-Lock Inc., Rapid City, South Dakota, USA) is a sniffer system where breath samples are provided when animals visit a bait station (Huhtanen et al., 2015). GreenFeed Emission Monitoring (GEM) systems are designed for measuring animal emissions in their production environment. As with other sniffer systems, GreenFeed samples breath from individual animals several times (in general 4 to 6 times) per day for short periods (3 to 7 minutes in which an under press..." Tag: Visual edit
• 20:1120:11, 14 February 2024 diff hist +1,361‎ N Breath sampling during milk and feeding ‎ Created page with "Several research groups have developed methods to measure CH4 concentration in breath of cows during milking and/or feeding. These are often referred to as ‘sniffer methods’ because they use devices originally designed to detect dangerous gas leaks. Air is sampled near the animal’s nostrils through a tube fixed in a feed bin and connected directly to a gas analyser. The feed bin might be in an automatic milking station (Garnsworthy et al., 2012A, B; Lassen et al.,..." Tag: Visual edit
• 20:1020:10, 14 February 2024 diff hist +2,161‎ N SF6 ‎ Created page with "The SF6 technique samples breath over 24 hours, whereas other techniques use spot samples of breath over periods of minutes throughout the day, so diurnal variation has to be considered. The majority of CH4 (87-99%) is released by eructation (Blaxter and Joyce, 1963; Murray et al., 1976), which provides a clear signal for sample processing. Please note that the tracheostomy used in Murray et al. (1976) may have resulted in a higher percentage, but in both publications,..." Tag: Visual edit
• 20:0820:08, 14 February 2024 diff hist +473‎ N Portable Accumulation Chamber ‎ Created page with "In Australia and New Zealand an alternative method was developed for the short-term measurement of Methane Production Rate (MPR) of sheep using Portable Accumulation Chambers (PAC) during 1 hour without leading discomfort to the animals. Similarly to RC, CH4 emissions recorded in PAC include gases from flatulence in addition to eructed and expired CH4, but only during 1 hour. For a detailed comparison of the PAC and respiration chamber methods see Jonker et al. (2018)." Tag: Visual edit
• 20:0420:04, 14 February 2024 diff hist +5,178‎ N Respiration chamber ‎ Created page with "Respiration chambers are calibrated to be accurate and precise, and are the gold standard for benchmarking new methods. Only respiration chambers measure total emissions from the animal via the oral, nasal and anal routes; all other methods ignore emissions via the anus and only measure CH4 emitted in breath. Breath measurements are justified because 99% of CH4 is emitted from the mouth and nostrils, and only 1% via the anus (Murray et al., 1976). A single animal (or occ..." Tag: Visual edit
• 20:0020:00, 14 February 2024 diff hist +236‎ Section 20 – Methane Emission for Genetic Evaluation ‎ →‎Sub-sections Tag: Visual edit
• 19:5919:59, 14 February 2024 diff hist 0‎ Section 20: Methane determining factors ‎ →‎HOST GENETICS, PHYSIOLOGY AND ENVIRONMENT Tag: Visual edit
• 19:5919:59, 14 February 2024 diff hist 0‎ Section 20: Methane determining factors ‎ →‎DIET AND RUMEN MICROBIOTA Tag: Visual edit
• 19:5919:59, 14 February 2024 diff hist +1‎ Section 20: Methane determining factors ‎ →‎DIET AND RUMEN MICROBIOTA Tag: Visual edit
• 19:5719:57, 14 February 2024 diff hist +10,982‎ N Section 20: Methane determining factors ‎ Created page with "===DIET AND RUMEN MICROBIOTA=== Table 1 contains a list of dietary or microbiota factors that determine CH₄ production. {| class="wikitable" |+ !Factors !Reference |- |The main determinants of daily methane production are dry matter intake and diet composition: the more feed consumed, and/or the greater the fibre content of the diet, the more methane is produced per day. However, per unit of DMI, and per unit of fat+protein yield the grass diet produced less e..." Tag: Visual edit
• 19:4519:45, 14 February 2024 diff hist 0‎ Section 20 – Methane Emission for Genetic Evaluation ‎ →‎Summary of changes Tag: Visual edit
• 19:4419:44, 14 February 2024 diff hist +526‎ Section 20 – Methane Emission for Genetic Evaluation ‎No edit summary Tag: Visual edit
• 19:4019:40, 14 February 2024 diff hist −6‎ Section 20 – Methane Emission for Genetic Evaluation ‎ →‎1 Introduction Tag: Visual edit
• 19:4019:40, 14 February 2024 diff hist +8,571‎ Section 20 – Methane Emission for Genetic Evaluation ‎No edit summary Tag: Visual edit

14 December 2023

• 16:0216:02, 14 December 2023 diff hist +9‎ Section 20: Definition and Terminology ‎No edit summary Tag: Visual edit
• 16:0116:01, 14 December 2023 diff hist −59‎ Greenfeed SOP ‎ →‎DAIRY AND BEEF GREENFEED STANDARD OPERATING PROCEDURE (SOP) Tag: Visual edit
• 16:0016:00, 14 December 2023 diff hist −82‎ Sniffer SOP ‎ →‎DAIRY SNIFFER STANDARD OPERATING PROCEDURE (SOP) Tag: Visual edit
• 15:1915:19, 14 December 2023 diff hist −29‎ Section 20 – Methane Emission for Genetic Evaluation ‎No edit summary Tag: Visual edit
• 15:1715:17, 14 December 2023 diff hist +116‎ Section 20 – Methane Emission for Genetic Evaluation ‎No edit summary Tag: Visual edit
• 15:1315:13, 14 December 2023 diff hist +40‎ Section 20 – Methane Emission for Genetic Evaluation ‎No edit summary Tag: Visual edit

13 December 2023

• 08:5308:53, 13 December 2023 diff hist +1,011‎ Section 20: Definition and Terminology ‎No edit summary Tag: Visual edit
• 08:3708:37, 13 December 2023 diff hist +32‎ Section 20 – Methane Emission for Genetic Evaluation ‎No edit summary Tag: Visual edit
• 08:3508:35, 13 December 2023 diff hist +423‎ N Section 20: Definition and Terminology ‎ Created page with "The following table contains a list of important definitions for terms and abbreviations used in guidelines and SOP. {| class="wikitable" |+ !Term !Definition |- !ADF !Acid detergent fibre |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- ! ! |- | | |- | | |- | | |}" Tag: Visual edit

7 December 2023

• 15:2615:26, 7 December 2023 diff hist +153‎ Section 20 – Methane Emission for Genetic Evaluation ‎No edit summary Tag: Visual edit
• 15:1615:16, 7 December 2023 diff hist +33‎ Sniffer SOP ‎No edit summary Tag: Visual edit
• 13:5513:55, 7 December 2023 diff hist +3‎ Greenfeed SOP ‎ →‎QUESTIONS AND ANSWERS Tag: Visual edit
• 13:5413:54, 7 December 2023 diff hist −20‎ Greenfeed SOP ‎ Creation of Preformatted for Q&A Tag: Visual edit
• 13:5113:51, 7 December 2023 diff hist +96‎ Greenfeed SOP ‎ Create Tables Tag: Visual edit
• 13:4013:40, 7 December 2023 diff hist −229‎ m Greenfeed SOP ‎ →‎DAIRY AND BEEF GREENFEED STANDARD OPERATING PROCEDURE (SOP) Tag: Visual edit
• 13:3813:38, 7 December 2023 diff hist −1‎ m Greenfeed SOP ‎No edit summary Tag: Visual edit
• 13:3613:36, 7 December 2023 diff hist +38‎ Greenfeed SOP ‎ Added L-Port Gate pic Tag: Visual edit
• 13:3413:34, 7 December 2023 diff hist +104‎ N File:L PortGate.png ‎No edit summary current
• 13:3113:31, 7 December 2023 diff hist −15‎ m Greenfeed SOP ‎ Change Sub Heading format Tag: Visual edit
• 13:3113:31, 7 December 2023 diff hist −3‎ Greenfeed SOP ‎No edit summary Tag: Visual edit
• 13:3013:30, 7 December 2023 diff hist +49‎ m Greenfeed SOP ‎ Format Changes Tag: Visual edit
• 13:2913:29, 7 December 2023 diff hist +5‎ m Greenfeed SOP ‎No edit summary Tag: Visual edit
• 13:2613:26, 7 December 2023 diff hist +17‎ Section 20 – Methane Emission for Genetic Evaluation ‎ Created Sniffer SOP link Tag: Visual edit
• 13:2613:26, 7 December 2023 diff hist +7,772‎ N Sniffer SOP ‎ Created page Sniffer SOP Tag: Visual edit
• 13:2413:24, 7 December 2023 diff hist +17‎ Section 20 – Methane Emission for Genetic Evaluation ‎No edit summary Tag: Visual edit
• 13:2313:23, 7 December 2023 diff hist +11,707‎ N Greenfeed SOP ‎ Created page with "DAIRY AND BEEF GREENFEED STANDARD OPERATING PROCEDURE (SOP) This document is the report obtained from the presentations, talks, chats and discussions of the Zoom meetings on 5th December 2022 (Dairy) and 7th December 2022 (Beef). In both meetings an introduction was made about the ICAR Feed&Gas Working Group, the objectives of the Working Group, including the revision of the guidelines (Section 20 - Recording Dairy Cattle Methane Emission for Genetic Evaluation) publish..." Tag: Visual edit
• 13:1813:18, 7 December 2023 diff hist −75‎ m Section 20 – Methane Emission for Genetic Evaluation ‎ Blanked the page Tags: Blanking Visual edit
• 13:1513:15, 7 December 2023 diff hist +75‎ N Section 20 – Methane Emission for Genetic Evaluation ‎ Created page with "Guidelines - Recording Dairy Cattle Methane Emission for Genetic Evaluation"

28 November 2023

• 14:5514:55, 28 November 2023 diff hist +45‎ User:Lbenzoni/sandbox ‎No edit summary