Reducing dietary sodium of dairy cows fed a low-roughages diet affect intake and feed efficiency,but not yield

作     者：Yehoshav A.Ben Meir Yoav Shaani Daniel Bikel Yuri Portnik Shamai Jacoby Uzi Moallem Joshua Miron Eyal Frank Yehoshav A.Ben Meir;Yoav Shaani;Daniel Bikel;Yuri Portnik;Shamai Jacoby;Uzi Moallem;Joshua Miron;Eyal Frank

作者机构：Department of Ruminant ScienceInstitute of Animal ScienceAgricultural Research Organization(ARO)Rishon Lezion 7528809Israel Department of Animal ProductionExtension ServiceMinistry of AgricultureRishon Lezion 7528809Israel 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2023年第12卷第1期

页      面：1-6页

核心收录：

学科分类：0905[农学-畜牧学] 09[农学] 

基　　金：This study was supported by grant no.870-1620 from the Israeli Dairy Board Foundation 

主　　题：Mineral absorption Sodium Eating behavior Environmentally friendly dairy farm 

摘      要：Wastewater from dairy farms has become a major environmental and economical *** residue in treated and untreated wastewater from dairy farms used for irrigation can lead to soil and groundwater salinization,with the risk of soil *** examined the effect of reducing sodium fed to mid to late lactating cows from 0.61%(high sodium[HS])to 0.45%(low sodium[LS])of dry matter on dry matter intake(DMI),milk and milk-component yields,eating behavior,apparent total track digestibility,feed efficiency,and sodium excretion into the *** randomly assigned 28 multiparous high-yielding(35 kg milk/d)cows to 1 of 2 treatment groups(LS or HS)in a crossover design,with 7 d of adaptation and 28 d of data *** sodium in the diet reduced sodium intake from 171 to 123 g/d while lowering sodium excreted in the manure by 22%.Energy corrected milk(ECM)yield(37.4 kg/d)and sodium excretion in the milk(33.7 g/d)were similar for both *** DMI of LS cows was lower than that of HS cows(27.3 vs.28 kg/d)and consequently,feed efficiency of the LS cows was higher(1.40 vs.1.35 ECM/DMI).Eating rate,meal and visit frequency,and eating time were similar for both treatments;meal and visit duration were longer for the HS cows,and meal and visit sizes tended to be *** of DM and amylase-treated neutral detergent fiber remained *** on the results of this study,and discussed considerations,we recommend lowering the dietary sodium content for mid to late lactating cows in commercial herds to 0.52%of DM,in order to reduce sodium excretion to the environment via urine.