Nutritive value of different varieties and morphological fractions of oats harvested at the soft dough stage

Tropical Science Pub Date : 2007-12-01 DOI:10.1002/TS.213

Fekede Feyissa, A. Tolera, S. Melaku

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引用次数: 7

Abstract

Chemical composition and in vitro organic matter digestibility (IVOMD) were measured in whole forage and morphological fractions of 20 varieties of oats (Avena sativa) harvested at the soft dough stage. Among the varieties, crude protein (CP) varied from 48 to 76 g kg−1 dry matter (DM), neutral detergent fibre (NDF) from 586 to 683 g kg−1 DM, acid detergent fibre (ADF) from 370 to 482 g kg−1 DM and lignin from 54 to 83 g kg−1 DM. The IVOMD of the whole forage ranged from 43 to 62%. Among the morphological fractions, leaf blades had the highest CP content and IVOMD, whereas the fibre constituents (NDF, ADF and lignin) were highest in the stems. The results revealed considerable variation in chemical composition and IVOMD among the oat varieties and morphological fractions. This implies that there are opportunities for improving forage production and quality from oats through appropriate exploitation of varietal differences. However, manipulation of management practices (such as choice of harvesting stage, use of mixed cropping with compatible legumes and fertiliser application) may still be needed for further improvement. Copyright © 2008 John Wiley & Sons, Ltd

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不同品种及软面团期燕麦形态组分的营养价值

测定了20个品种软面团期燕麦的全饲和形态组分的化学成分和体外有机物消化率(IVOMD)。粗蛋白质(CP)含量在48 ~ 76 g kg - 1干物质(DM)之间，中性洗涤纤维(NDF)含量在586 ~ 683 g kg - 1 DM之间，酸性洗涤纤维(ADF)含量在370 ~ 482 g kg - 1 DM之间，木质素含量在54 ~ 83 g kg - 1 DM之间。全草的IVOMD为43% ~ 62%。各形态组分中，叶片CP含量和IVOMD含量最高，茎部纤维成分(NDF、ADF和木质素)含量最高。结果表明，不同燕麦品种和形态组分的化学成分和IVOMD存在较大差异。这意味着，通过适当利用品种差异，有机会提高燕麦的饲料产量和质量。然而，为了进一步改进，可能仍然需要操纵管理实践(例如选择收获阶段，使用与兼容豆类和施肥的混合种植)。版权所有©2008 John Wiley & Sons, Ltd

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Tropical Science

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