雷州山羊喜食牧草养分含量及其与相对采食频度相关性分析  

Analysis of the Relativity Between the Nutrient Content of Pasturage and the Relative Frequency of Feeding in Leizhou Goat Grazing on Natural Grassland

作　　者：王志敬[1] 吴征敏 庄桂锋 吴浩浩[1] 黎子才 陈普 王亚运 胡曾明 尹福泉[1] 

机构地区：[1]广东海洋大学农学院,湛江524088

出　　处：《中国畜牧兽医》2017年第10期2931-2936,共6页China Animal Husbandry & Veterinary Medicine

基　　金：雷州山羊杂交改良技术创新(201201149);雷州山羊提纯复壮及杂交改良技术研究(2013A03009);舍饲条件下雷州山羊全混合日粮(TMR)的研制(2013A01042);舍饲条件下雷州山羊养殖关键技术研究与示范(2015A03029);舍饲雷州山羊全混合日粮(TMR)配方研制及应用(2016LM3189);广东省大学生创新实验项目(524000087206;CXXL2016048;201610566061)

摘　　要：为了解南方地区天然草场放牧雷州山羊牧食行为,以及天然牧草养分含量与其相对采食频度的相关性,连续7 d跟踪放牧观察记录雷州山羊牧食行为,并且根据雷州山羊采食情况采集牧草样本。试验结果表明,雷州山羊对于大花牵牛、牛筋草、柳叶箬和白茅的相对采食频度分别为55.51%、28.70%、8.13%和(P<0.05)1.18%;在测定的几种牧草中,白茅的干物质(DM)(P<0.05)、中性洗涤纤维(NDF)(P<0.05)和酸性洗涤纤维(ADF)最高,鬼针草的粗蛋白质(CP)(P<0.05)、钙(Ca)(P<0.05)、磷(P)(P<0.05)、粗灰分(Ash)和粗脂肪(EE)最高,柳叶箬的粗纤维(CF)含量最高;雷州山羊的相对采食频度与牧草CP含量的相关系数为0.793(P<0.05),与CF含量的相关系数为-0.813(P<0.05),与ADF含量的相关系数为-0.328(P>0.05),与NDF含量的相关系数为-0.945(P<0.01),与Ca含量的相关性系数为0.804(P<0.05),与P含量的相关系数为0.735(P<0.05)。综上可得,雷州山羊的相对采食频度与天然草场牧草中的CP、Ca和P含量具有显著的正相关关系;与CF、NDF含量具有显著或极显著的负相关关系。In order to understand the correlation between the grazing behavior of Leizhou goat and natural meadow nutrient content,the pasture behavior of Leizhou goats were tracked and recorded for 7 consecutive days,then the grass samples were collected according to the feeding conditions. The results showed that the relative feeding frequency of Pharbitis nil,Eleusine indica,Isachne globosa and Imperata cylindrica for Leizhou goats were 55.51%,28.70%,8.13% and 1.18%,respectively. Among the determinated pastures,the contents of dry matter（ DM）（P〈0.05）,neutral detergent fiber（ NDF）（P〈0.05） and acid detergent fiber（ ADF） in Imperata cylindrica were the highest; Bidens pilosa had the highest contents of crude protein（ CP）（P〈0.05）,calcium（ Ca）（P〈0.05）,phosphorus（ P）（P〈0.05）,crude ash（ ASH）and crude fat（ EE）; The crude fiber（ CF） content in Isachne globosa was the highest. The correlation coefficient between the content of grass CP,CF,ADF,NDF,Ca as well as P and relative feeding frequencywas 0.793（P〈0.05）,-0.813（P〈0.05）,-0.328（P〈0.05）,-0.945（ P〈0.01）,0.804（ P〈0.05）,0.735（P〈0.05）,respectively. In conclusion,there were significant positive correlation between the relative feeding frequency of Leizhou goats and the cotent of CP,Ca and P in native grass,and had a significant or extremely significant negtive correlation with CF and NDF content.

关 键 词：雷州山羊 天然草场 牧食行为 相关性 

分 类 号：S827[农业科学—畜牧学]