Nutritional evaluation of leaves of some salt-tolerant tree species by assessing, in vitro, the ruminal microbial nitrogen and fermentation characteristics

M R Al-Masri

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Nutritional evaluation of leaves of some salt-tolerant tree species by assessing, in vitro, the ruminal microbial nitrogen and fermentation characteristics

机译：通过体外评估瘤胃微生物氮和发酵特性，对某些耐盐树种的叶片进行营养评估

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Leavesofsomesalt-toleranttreespecies(TamarixarticulataVahl.,Tamarixaphylla(L)Karst,AcaciaamplicepsMaslin,CasuarinaequisetifoliaL,ParkinsoniaaculeateL,EucaliptuscamaldulensisDahnhard)wereevaluatedintermsofmicrobialnitrogen(MN)andbiomass(MBM)productionafterincubationwithrumenfluidand15N-tracerfor96hintheabsenceorpresenceofpolyethyleneglycol(PEG,6000).Thecharacteristicsoffermentation(initialgasproducedfromsolublefraction;a,gasproductionduringincubationproducedfrominsolublebutfermentablefraction;b,potentialgasproduction;a+b,fractionalrateofgasproductionperhour;c,wereassessedusinganinvitroincubationtechniquewithrumenfluid.Effectivedegradability(ED)andshortchainfattyacids(SCFA)werealsoestimatedforleavesoftheexperimentaltreespecies.Thea+bvalues(mL/gDM)werehighest(P0.05)inA.ampliceps(191),lowestinT.articulateandC.equisetifolia(119),andintermediateinT.aphylla,E.camaldulensisandP.aculeate(158).E.camaldulensis,A.amplicepsandP.aculeatehadhigher(P0.05)fractionalrateofgasproduction(0.080/h)thanotherspecies(0.061/h).TherewasapositivecorrelationbetweenSCFAconcentrationsandcanda+bvalues.TheratiosofMNandMBMtoeffectivedegradedsubstrateandthevaluesofMNandMBMweresignificantlyhigher(P0.05)inP.aculeateandA.amplicepscomparedwithotherspecies.MicrobialnitrogenandMBMproductionwerepositivelycorrelatedwitha+b,EDandSCFA.TheadditionofPEGtotheplantsamplesincubatedwithrumenfluidataratioof2:1PEG:substrateincreasedthevaluesofgasproduction,characteristicsoffermentation,MN,MBM,SCFAandED.TheresponseofleavesoftheexperimentaltreespeciestoPEGtreatmentintermsofincreasedgasproductionvariedbetweenspeciesandtendedtodeclineasincubationprogressed,withthehighestincreaseduringthefirst30hofincubation.LeavesofP.aculeateandA.amplicepsgavehighestvaluesofmicrobialnitrogenandbiomassproductionandthereforemaybefoundusefulforsupplementation,invivooflowcrudeproteinforagediets.FeedingofPEGwithleavesoftreespeciescontaininghighlevelsoftanninscanbehelpfulbyincreasingtheeffectivedegradabilityofdrymatter.

机译：Leavesofsomesalt-toleranttreespecies（TamarixarticulataVahl，Tamarixaphylla（L）卡斯特，AcaciaamplicepsMaslin，CasuarinaequisetifoliaL，ParkinsoniaaculeateL，EucaliptuscamaldulensisDahnhard。）wereevaluatedintermsofmicrobialnitrogen（MN）andbiomass（MBM）productionafterincubationwithrumenfluidand15N-tracerfor96hintheabsenceorpresenceofpolyethyleneglycol（PEG，6000）.Thecharacteristicsoffermentation（initialgasproducedfromsolublefraction;一，gasproductionduringincubationproducedfrominsolublebutfermentablefraction; B，potentialgasproduction; a + b，每小时的产气率; c，使用瘤胃液进行体外温育技术进行评估。有效降解率（ED）和短链脂肪酸（SCFA）也被估算为留出柔软的实验树种，其a + b值（mL / gDM）最低（A / b）最高为（A / b）C（最大为191）（P / t）。中间体和中间产物T.aphylla，E.camaldulensis和P.aculeate（158）.E.camaldulensis，A.ampliceps和P.aculeate的产气率（P <0.05）（0.080 / h）tha notherspecies（0.061 /小时）.TherewasapositivecorrelationbetweenSCFAconcentrationsandcanda + bvalues.TheratiosofMNandMBMtoeffectivedegradedsubstrateandthevaluesofMNandMBMweresignificantlyhigher（PLT; 0.05）inP.aculeateandA.amplicepscomparedwithotherspecies.MicrobialnitrogenandMBMproductionwerepositivelycorrelatedwitha + B，EDandSCFA.TheadditionofPEGtotheplantsamplesincubatedwithrumenfluidataratioof2：1PEG：substrateincreasedthevaluesofgasproduction，characteristicsoffermentation，MN，肉骨粉，SCFAandED.TheresponseofleavesoftheexperimentaltreespeciestoPEGtreatmentintermsofincreasedgasproductionvariedbetweenspeciesandtendedtodeclineasincubationprogressed，withthehighestincreaseduringthefirst30hofincubation.LeavesofP.aculeateandA氨水具有最高的微生物氮和生物量产值，因此可以用于补充有益的饲料中的活血粗蛋白质饮食。通过添加含有高含量软蛋白的多种软物种，可以提高干物质的有效降解性，从而提供聚乙二醇。

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《Livestock research for rural development 》 |2015年第2期| 共页
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M R Al-Masri;
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Nutritional evaluation of leaves of some salt-tolerant tree species by assessing, in vitro, the ruminal microbial nitrogen and fermentation characteristics

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