常用粗饲料营养成分和饲用价值分析

发布时间：2019-04-01 15:53

【摘要】：通过常规化学分析法和康奈尔净碳水化合物-蛋白质体系(CNCPS)评定不同粗饲料的营养成分并比较其组成差异,结合粗饲料品质评定预测公式评定其饲用价值。结果表明,1)黑麦草、甘薯蔓与牛鞭草的粗蛋白质(CP)、粗脂肪(EE)、可溶性粗蛋白质(SCP)和非蛋白氮(NPN)含量显著高于玉米秸秆和稻草,中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)含量显著低于玉米秸秆和稻草。2)黑麦草和甘薯蔓的糖类(CA)、快速降解真蛋白(PB1)含量显著高于其他粗饲料,甘薯蔓、黑麦草和牛鞭草淀粉和果胶(CB1)、非结构碳水化合物(NSC)和慢速降解真蛋白(PB3)显著高于稻草和玉米秸秆。稻草的可利用纤维(CB2)含量显著高于其他粗饲料,玉米秸秆的碳水化合物(CHO)、不可利用碳水化合物(CC)和中速降解蛋白质部分(PB2)含量显著高于其他粗饲料。3)不同粗饲料氨基酸(AA)组成差异大,提供限制性氨基酸的潜力不同,黑麦草的总氨基酸(TAA)、必需氨基酸(EAA)和限制性氨基酸(LAA)的含量显著高于其他粗饲料,玉米秸秆和稻草最低。4)黑麦草的可消化干物质量(DDM)和粗饲料相对值(RFV)均显著高于其他粗饲料,甘薯蔓的干物质随意采食(DMI)和RFV显著高于牛鞭草,玉米秸秆和稻草的DMI、DDM和RFV均为最低,且两者差异不显著。因此,黑麦草的营养价值最高,其次为牛鞭草和甘薯蔓,玉米秸秆和稻草最低。
[Abstract]:Conventional chemical analysis and Cornell's net carbohydrate-protein system (CNCPS) were used to evaluate the nutritional components of different roughages and their composition differences were compared. The fodder value was evaluated by the prediction formula of roughage quality assessment. The results showed that: 1) the contents of crude protein (CP), crude fat (EE), soluble crude protein (SCP) and non-protein nitrogen (NPN) in ryegrass, sweet potato vine and Rhizoma flagellum were significantly higher than those in corn straw and straw, and the neutral detergent fiber (NDF), was significantly higher than that of corn straw and straw. The (ADF) content of acid detergent fiber was significantly lower than that of corn straw and straw. 2) the rapid degradation of true protein (PB1) content of ryegrass and sweet potato vine was significantly higher than that of other roughages, sweet potato vine, ryegrass and sweet potato vine. Ryegrass and bullwhip starch and pectin (CB1), unstructured carbohydrates (NSC) and slow degradation of true protein (PB3) were significantly higher than those of straw and corn straw. The available fiber (CB2) content of rice straw was significantly higher than that of other coarse fodder, and the carbohydrate (CHO), of corn straw was significantly higher. The contents of unusable carbohydrate (CC) and middle-speed degraded protein part (PB2) were significantly higher than those of other roughages. 3) the (AA) composition of amino acids in different roughages varied greatly, and the potential of limiting amino acids was different. The contents of total amino acid (TAA), essential amino acid (EAA) and restricted amino acid (LAA) in ryegrass were significantly higher than those in other roughages. (4) the digestible dry matter quality (DDM) and the relative value of forage (RFV) of ryegrass were significantly higher than those of other roughages, and the dry matter intake of sweet potato vine was significantly higher than that of bullwhip grass, and the dry matter of sweet potato vine was significantly higher than that of bullwhip grass. The DMI,DDM and RFV of corn straw and straw were the lowest, and there was no significant difference between them. Therefore, the nutrition value of ryegrass was the highest, followed by Dichonella officinalis and sweet potato vine, corn straw and straw was the lowest.
【作者单位】：四川农业大学动物营养所;
【基金】：农业部公益性行业专项(20090300608)资助
【分类号】：S816.5

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