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草业学报  2009 

6种豆科饲用灌木中酚类物质动态变化与体外消化率的关系

, PP. 32-38

Keywords: 豆科灌木,酚类物质,体外消化率

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Abstract:

通过对云南省几种主要豆科饲用灌木不同生育期酚类化合物含量的分析研究,结果表明,单宁的含量变化范围从银合欢的枯黄期(42.9g/kg)到假大青蓝的开花期(123.6g/kg)之间;简单酚的含量变化范围从银合欢的营养期(11.6g/kg)到结荚期(58.7g/kg)之间;总酚的含量在各生育期的变化范围依次为109.1~173.3,104.1~169.2,103.7~153.0和86.6~155.6g/kg。4种酚类化合物含量都较高的灌木有假大青蓝,含量均较低的有多花木蓝和假木豆。4种酚类化合物的含量总体表现为总酚>单宁>缩合单宁>简单酚。缩合单宁与总酚和单宁之间呈极显著正相关(P<0.01),与简单酚之间呈不显著的负相关(P>0.05)。体外干物质消化率(IVDMD)在同一生育期不同灌木间差异显著(P<0.05),体外有机物消化率(IVOMD)在同一生育期不同灌木间差异显著(P<0.05)。体外消化率和体内消化率与总酚、单宁和缩合单宁呈极显著负相关(P<0.01),且相关系数绝对值大于0.7。

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