海南省部分热带灌木饲用价值评定

Feeding Value Assessment of Some Tropical Shrubs in Hainan Province

本试验旨在评定海南省部分热带灌木的饲用价值。试验通过常规化学成分分析和体外产气技术测定了18种热带灌木主要营养成分含量、体外产气量(GP)、体外干物质消化率(IVDMD)和代谢能(ME),并对营养成分与GP、IVDMD和ME进行相关性分析,采用多元线性回归分析得出相关的预测模型。结果表明,18种热带灌木干物质(DM)、粗蛋白质(CP)、粗脂肪(EE)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、有机物(OM)、单宁(TT)含量及饲料相对值(RFV)、ME、IVDMD平均值分别为32.22%、14.14%、3.99%、38.83%、33.67%、91.48%、1.53%、1.14、8.24 MJ/kg、58.85%。另外,DM、CP、EE、ADF、NDF和TT与GP、IVDMD和ME显著相关(P<0.05)。综上所述,热带灌木CP、EE含量高,NDF、ADF含量适中,TT含量低,RFV、ME和IVDMD高,说明热带灌木对海南黑山羊具有较高的潜在饲用价值。同时,本试验提出了适用于热带灌木的GP、IVDMD和ME的营养成分预测模型。

The aim of this experiment was to evaluate the feeding values of tropical shrub species in Hainan province.The nutritional ingredient,in vitro gas production(GP),in vitro dry matter degradability(IVDMD) and metabolizable energy(ME) of eighteen tropical shrubs were determined by component analysis and in vitro GP technique.Correlation analysis between nutritional ingredient and GP,VDMD,ME was estimated,and the multiple linear regression analysis was used to derive the prediction model.The results showed that mean values of dry matter(DM),crude protein(CP),ether extract(EE),neutral detergent fiber(NDF),acid detergent fiber(ADF),organic matter(OM),total tannins(TT),relative feed value(RFV),ME and IVDMD of eighteen tropical shrubs were 32.22%,14.14%,3.99%,38.83%,33.67%,91.48%,1.53%,1.14,8.24 MJ/kg and 58.85%,respectively.In addition,this study found that the contents of DM,CP,EE,ADF,NDF and TT were significantly correlated with GP,IVDMD and ME(P<0.05).In conclusion,the tropical shrubs have high contents of CP,EE,ME,IVDMD,and RFV,moderate contents of NDF and ADF,and low content of TT.Thus,tropical shrubs have higher potential nutritive values for Hainan black goats.The prediction model is proposed in the present study for GP,IVDMD and ME,which are suitable for tropical shrubs in Hainan province.