青贮容器不同部位高丹草青贮饲料的营养价值

Comparison of quality and nutritional value of Sorghum bicolor × S. sudanense in different positions of the bucket

本试验旨在比较青贮容器中不同部位对高丹草(Sorghum bicolor×S.sudanense)青贮饲料发酵品质和营养品质的影响。分别取63个青贮容器上、中、下3个部位的青贮料进行青贮发酵品质和营养成分的测定,并依此推算出各部位青贮饲料的相对饲用价值(RFV)。结果表明,青贮饲料乳酸含量随着青贮桶中取样部位的加深而增加,且青贮桶下部乳酸含量显著高于上部(P<0.05)。取样部位对青贮饲料干物质(DM)含量、中性洗涤纤维(NDF)含量、酸性洗涤纤维(ADF)含量和相对饲用价值(RFV)具有显著影响(P<0.05),随着部位加深其干物质(DM)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)含量逐渐减少,而相对饲用价值(RFV)逐渐增加。

This study was designed to compare silage quality and nutritional value of Sorghum bicolor ×S. sudanense collecting from different parts of the container. The samples were taken from three parts of the 63 silage containers,and their quality,nutritional value were analyzed and relative feed value（ RFV） was calculated.Results indicated that lactic acid content（ LA） in silage increased with sampling sites deepened,and lactic acid content in the upper part was higher than that in the lower part significantly（ P 〈0. 05）. The nutritional value of dry matter（ DM）,neutral detergent fiber（ NDF）,acid detergent fiber（ ADF） and the relative feeding value（ RFV） were significantly affected（ P 〈0. 05） by sampling positions. With the deepening of the sampling site,dry matter（ DM）,neutral detergent fiber（ NDF） and acid detergent fiber（ ADF） decreased,while the relative feeding value（ RFV） gradually increased.