The use of milk Fourier transform midinfrared spectra and milk yield to estimate heat production as a measure of efficiency of dairy cows

作     者：Sadjad Danesh Mesgaran Anja Eggert Peter Höckels Michael Derno Björn Kuhla Sadjad Danesh Mesgaran;Anja Eggert;Peter H?ckels;Michael Derno;Bj?rn Kuhla

作者机构：Institute of Nutritional Physiology“Oskar Kellner”Leibniz Institute for Farm Animal Biology(FBN)Wilhelm-Stahl-Allee 218196 DummerstorfGermany Institute of Genetics and BiometryLeibniz Institute for Farm Anih8mal Biology(FBN)Wilhelm-Stahl-Allee 218196 DummerstorfGermany IfM GmbH&Co.KG-Institut für Milchuntersuchung(Milk Testing Services North Rhine-Westphalia)Bischofstraße 8547809 KrefeldGermany 

出 版 物：《Journal of Animal Science and Biotechnology》 (畜牧与生物技术杂志（英文版）)

年 卷 期：2020年第11卷第3期

页      面：920-928页

核心收录：

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 0832[工学-食品科学与工程（可授工学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 0905[农学-畜牧学] 0906[农学-兽医学] 09[农学] 0703[理学-化学] 0836[工学-生物工程] 

基　　金：One part of Experiment 1(Supplementary Table 1)was executed within JPI FACCE program and another part in the optiKuh project,both financially supported by the German Federal Ministry of Food and Agriculture(BMBL)through the Federal Office for Agriculture and Food(BLE),grant number 2814ERA04A and 2817201313,respectively Experiment 2 was performed within ERA-GAS program and financially supported by the BMBL through the BLE,grant number 2817ERA09C Experiment 3 was financially supported by the BMBL through the Landwirtschaftliche Rentenbank(LR),grant number 28RZ3P077 Experiment 4 received funding from the core budget of the FBN The authors acknowledge financial support for publication fom the Open Access Fond of the FBN and declare that the aforementioned funding parties had no role in the design of the study or in data collection,analysis,interpretation and writing of the manuscript 

主　　题：Dairy cattle Heat production Milk spectra Partial least square regression Respiration chamber 

摘      要：Background:Transformation of feed energy ingested by ruminants into milk is accompanied by energy losses via fecal and urine excretions,fermentation gases and *** production may differ among dairy cows despite comparable milk yield and body ***,heat production can be considered an indicator of metabolic efficiency and directly measured in respiration *** latter is an accurate but time-consuming *** contrast,milk Fourier transform mid-infrared(FTIR)spectroscopy is an inexpensive high-throughput method and used to estimate different physiological traits in ***,this study aimed to develop a heat production prediction model using heat production measurements in respiration chambers,milk FTIR spectra and milk yield measurements from dairy ***:Heat production was computed based on the animal’s consumed oxygen,and produced carbon dioxide and methane in respiration *** production data included 16824-h-observations from 64 German Holstein and 20 dual-purpose Simmental *** were milked twice daily at 07:00 and 16:30 h in the respiration *** yield was determined to predict heat production using a linear *** samples were collected from each milking and FTIR spectra were obtained with MilkoScan FT *** average or milk yield-weighted average of the absorption spectra from the morning and afternoon milking were calculated to obtain a computed spectrum.A total of 288 wavenumbers per spectrum and the corresponding milk yield were used to develop the heat production model using partial least squares(PLS)***:Measured heat production of studied animals ranged between 712 and 1470 kJ/kg *** coefficient of determination for the linear regression between milk yield and heat production was 0.46,whereas it was 0.23 for the FTIR spectra-based PLS *** PLS prediction model using weighted average spectra and milk yield resulted in a cross-validation variance of 57%and a ro