日粮中不同马齿苋青贮添加量对奶山羊泌乳性能的影响

Effects of Different Addition Amounts of Portulaca oleracea L. Silage on Lactation Performance of Dairy Goats

本试验旨在研究添加不同剂量马齿苋青贮对奶山羊泌乳性能的影响。选取体重(62±3)kg、1~2胎次、产奶量(1.90±0.15)kg/d、泌乳期相近(产后0~60d)的健康奶山羊12只,随机分为4组,每组3个重复,每个重复1只羊。在奶山羊全混合日粮(TMR)中分别添加0(CK组)、10(A组)、20(B组)和30g/d DM(C组)马齿苋青贮添加剂,试验期共75d,其中预试期15d,正试期60d。试验期间测定每组奶山羊干物质采食量、产奶量、乳品质及血液生化指标。结果显示:随马齿苋青贮添加量的增加,奶山羊干物质采食量随之增加;添加马齿苋青贮的试验组奶山羊泌乳量均高于对照组;羊乳的pH呈弱碱性(7.10~7.24),并随马齿苋青贮添加量增加而降低,其中CK组最高,C组最低;羊乳中乳糖、总多酚(TPC)、总黄酮(TFC)和β胡萝卜素的含量均随着马齿苋青贮添加量增加而增多;血液中总胆固醇含量则相反。综上所述,日粮中添加马齿苋青贮对奶山羊无不良影响,可一定程度上提高奶山羊干物质采食量、泌乳量及乳品质,降低血液中总胆固醇含量。

The study was aimed to explore the effects of different addition amounts of Portulaca oleracea L.silage on lactation performance of dairy goats.12 healthy dairy goats with（62±3）kg body weight,（1.90±0.15）kg/d milk yield and similar lactation period（0 to 60 dpostpartum）were chosen and randomly divided into 4 groups with 3 replicates per group and 1 dairy goat per replicate.The dairy goats were fed with total mixed rotation（TMR）adding 0（CK group）,10（group A）,20（group B）and 30 g/d DM（group C）Portulaca oleracea L.silage,respectively.The trial period was 75 d,of which the pre-test period was 15 dand the trial period was 60 d.The dry matter intake,milk yield,milk quality and blood biochemical indexes were determined.The results showed that the amount of dry matter intake of dairy goats increased with the increase of Portulaca oleracea L.silage adding amount.The milk yield in Portulaca oleracea L.silage addinggroups were improved compared with control group.The pH range of goat milk was 7.10 to7.24,showing a downward trend with the increase of additive,and CK group was highest while the group C was lowest.The content of lactose,TPC,TFC andβ-carotene in the milk increased with the increase of Portulaca oleracea L.silage dosage,while the total cholesterol content in the serum showed the opposite trend.In conclusion,there was no adverse effect on dairy goats by adding Portulaca oleracea L.silage in TMR,which could increase the feed intake of dairy goats,milk yield and milk quality,meanwhile decrease the total cholesterol.