| 摘要: |
| [目的]比较陕西关中地区玉米秸秆与4种玉米青贮饲料营养价值的差异,为玉米秸秆的贮藏饲用提供参考.[方法]用常规养分分析法和范式洗涤剂法,测定了玉米秸秆和西北农林科技大学畜牧站、西安新天地草业公司、宝鸡凤翔县范家寨中学、咸阳淳化润镇中学4种玉米青贮饲料的水分、粗蛋白质(CP)、粗脂肪(EE)、粗纤维(CF)、无氮浸出物(NFE)、粗灰分(Ash)以及中性洗涤可溶物(NDS)、纤维素(F)、半纤维素(HF)、酸性洗涤木质素(ADL)、酸不溶灰分(AIA)等营养成分的含量.[结果]玉米秸秆的水分含量为95 g/kg,玉米青贮饲料的水分含量为742～807 g/kg;玉米秸秆的CP含量为81.3 g/kg,玉米青贮饲料的CP含量为144.2～160.7 g/kg,其中西北农林科技大学畜牧站专用玉米青贮饲料的CP含量为160.7 g/kg;玉米秸杆的EE含量为64.1 g/kg,玉米青贮饲料的EE含量为78.0～80.3 g/kg;玉米秸秆的CF含量为495.5 g/kg,玉米青贮饲料的CF含量为393.7～429.1 g/kg,西安新天地草业公司拉丝玉米秸秆青贮饲料的CF含量最高,为429.1 g/kg;玉米秸杆的NFE含量为258.2 g/kg,玉米青贮饲料的NFE含量为242.8～266.3 g/kg;玉米秸杆的Ash含量为100.9 g/kg,玉米青贮饲料的Ash含量为101.3～113.2 g/kg;玉米秸秆的NDS含量为334.2 g/kg,玉米青贮饲料的NDS含量为428.2～497.9 g/kg,西北农林科技大学畜牧站专用玉米青贮饲料的NDS含量最高,为497.9 g/kg;玉米秸秆的F+HF含量最高,达557.4 g/kg,玉米青贮饲料的F+HF含量为433.0～496.7 g/kg,其中以西安新天地草业公司拉丝玉米秸秆青贮饲料的F+HF含量最高,为496.7 g/kg,且其HF含量亦最高,为245.3 g/kg;玉米秸秆的ADL含量高达48.3 g/kg,而玉米青贮饲料则为28.5～31.2 g/kg,西北农林科技大学畜牧站专用玉米青贮饲料的ADL含量最低,为28.5 g/kg;玉米秸秆的AIA含量最高,为60.1 g/kg,玉米青贮饲料的AIA含量为40.6～43.9 g/kg,其中以西北农林科技大学畜牧站专用玉米青贮饲料最低,为40.6 g/kg.[结论]与玉米秸秆相比,玉米青贮饲的料水分和CP、NDS含量均较高.几种玉米秸杆青贮饲料中,西北农林科技大学畜牧站专用玉米青贮饲料的CP、NDS、NFE含量最大,营养价值最高;西安新天地草业公司拉丝玉米秸秆青贮饲料的F含量最高,营养价值居于其次. |
| 关键词: 玉米秸秆 青贮玉米 常规养分分析方法 Van-Soest洗涤剂法 营养价值 |
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| Analysis of corn straw and 4 silage nutritional value |
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| Abstract: |
| 【Objective】 The research tested the difference of nutritional value of the corn straw and four kinds of corn silages in the area of Guanzhong, Shaanxi, in order to offer reference for the storage and use of corn straw.【Method】 This paper used the conventional nutrient analysis method and Van Soest detergent to get the moisture content,the crude protein (CP),the ether extract (EE),the crude fiber (CF),Nitrogen free extract (NFE),ash (Ash) and Neutral detergent solution (NDS),fiber (F),half fiber (HF),acid detergent lignin (ADL),as well as the acid insulation ash (AIA). 【Result】 The result showed that the moisture content of corn straw was 95 g/kg,and corn silage in the range of 742-807 g/kg.The CP content of corn straw was 81.3 g/kg,and corn silage in the range of 144.2-160.7 g/kg and especially the corn silage of stock farm of Northwest A&F University 160.7 g/kg.The EE content of corn straw was 64.1 g/kg,and corn silage in the range of 78.0-80.3 g/kg.The CF content of corn straw was 495.5 g/kg,and corn silage in the range of 393.7-429.1 g/kg and the corn silage straw of Xintiandi had the highest CF,429.1 g/kg.The NFE content of corn straw was 258.2 g/kg,and corn silage in the range of 242.8-266.3 g/kg.The Ash content of corn straw was 100.9 g/kg,and corn silages in the range of 101.3-113.2 g/kg.The NDS content of corn straw was 334.2 g/kg,and corn silage in the range of 428.2-497.9 g/kg and the corn silage of stock farm of Northwest A&F University had the highest NDS content,497.9 g/kg.The corn straw had the highest F+HF,557.4 g/kg,and the corn silage in the range of 433.0-496.7 g/kg and the highest content in corn silage was corn silage straw of Xintiandi,496.7 g/kg,the HF of which was highest,245.3 g/kg.The ADL content of corn straw was 48.3 g/kg,and corn silages in the range of 28.5-31.2 g/kg and the corn silage of stock farm of Northwest A&F University had the lowest ADL content,28.5 g/kg.The AIA content of corn straw was 60.1 g/kg,and corn silages in the range of 40.6-43.9 g/kg and the corn silage of stock farm of Northwest A&F University had the lowest AIA content,40.6 g/kg.【Conclusion】 Compared with corn straw,corn silage had higher moisture content,CP and NDS.The corn silage of stock farm of Northwest A&F University had the highest nutritional value in these corn silage for the highest CP,NDS,NFE.Corn silage straw of Xintiandi had the highest F content in these corn silages and so its nutritional value came second. |
| Key words: corn straw corn silage conventional method of nutrient analysis Van-Soest method value of nutrition |
