Wang Hong Liang, Shi Meng, Xu Xiao, Pan Long, Liu Ling, Piao Xiang Shu
State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre, China Agricultural University, Beijing 100193, China.
Asian-Australas J Anim Sci. 2017 Apr;30(4):562-568. doi: 10.5713/ajas.16.0429. Epub 2016 Aug 19.
The hull attached to the barley kernel can be mechanically removed thus reducing the fiber content of the barley. This experiment was carried out to evaluate the effects of partial dehulling on the nutrient digestibility as well as the digestible energy (DE) and metabolizable energy (ME) content of barley in pigs.
Two hulled barley samples (high fiber barley [HF] and low fiber barley [LF]) with either high or low fiber contents were obtained from the Hubei and Jiangsu Provinces of China. A portion of the two barleys was mechanically dehulled (dehulled high fiber barley [DHF] and dehulled low fiber barley [DLF]). Thirty barrows (initial BW = 31.5±3.2 kg) were assigned to one of five diets in a randomized complete block design. The five diets consisted of 96.9% corn, HF, LF, DHF, or DLF supplemented with 3.1% minerals and vitamins. Each diet was fed to six barrows housed in individual metabolism crates for a 10-d acclimation period followed by a 5-day total but separate collection of feces and urine.
The daily loss of gross energy (GE) in feces was lower (p<0.01) for pigs fed DHF than for those fed HF. The daily N intake and fecal N loss were lowest (p<0.01) for pigs fed the corn diet. The DE and ME as well as the apparent total tract digestibility (ATTD) of dry matter, GE, organic matter, neutral detergent fiber (NDF) and acid detergent fiber (ADF) of DHF or DLF were higher (p<0.01) than the values in HF and LF, respectively while the values except the ATTD of NDF and ADF in DLF were higher (p<0.01) than the values in DHF and were comparable to corn.
The DE and ME contents as well as the ATTD of nutrients in both DHF and DLF barley were improved compared with the HF and LF barley. Moreover, the nutritive value of DLF barley was comparable to the yellow-dent corn used in the study.
附着在大麦籽粒上的谷壳可以通过机械方式去除，从而降低大麦的纤维含量。本试验旨在评估部分脱壳对猪大麦营养物质消化率以及可消化能（DE）和代谢能（ME）含量的影响。
从中国湖北省和江苏省获取了两种纤维含量高低不同的带壳大麦样品（高纤维大麦[HF]和低纤维大麦[LF]）。将这两种大麦的一部分进行机械脱壳（脱壳高纤维大麦[DHF]和脱壳低纤维大麦[DLF]）。采用随机完全区组设计，将30头公猪（初始体重=31.5±3.2千克）分配到五种日粮中的一种。这五种日粮分别由96.9%的玉米、HF、LF、DHF或DLF补充3.1%的矿物质和维生素组成。每种日粮饲喂6头饲养在个体代谢笼中的公猪，为期10天的适应期，随后进行5天的粪便和尿液全收但分开收集。
饲喂DHF的猪粪便中总能（GE）的日损失低于饲喂HF的猪（p<0.01）。饲喂玉米日粮的猪日氮摄入量和粪便氮损失最低（p<0.01）。DHF或DLF的DE和ME以及干物质、GE、有机物、中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）的表观全肠道消化率（ATTD）分别高于HF和LF中的值（p<0.01），而DLF中除NDF和ADF的ATTD外的值高于DHF中的值（p<0.01），且与玉米相当。
与HF和LF大麦相比，DHF和DLF大麦的DE和ME含量以及营养物质的ATTD均有所提高。此外，DLF大麦的营养价值与本研究中使用的黄马齿玉米相当。
