夏季窖内不同深度全株玉米青贮品质和营养价值的比较  

Comparisons of the Quality and Nutritional Value of Whole-plant Corn Silage at Various Depths under the Top Surface of Silo in Summer

作　　者：闫贵龙[1,2] 曹春梅[2] 刁其玉[1] 洪梅[1] 王建红[1] 

机构地区：[1]中国农业科学院饲料研究所,北京100081 [2]河北北方学院牧业工程系,张家口075000

出　　处：《畜牧兽医学报》2011年第3期381-388,共8页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：国家科技支撑项目(2006BAD04A04-05)

摘　　要：为研究简陋覆盖方式对夏季青贮窖中全株玉米青贮品质和营养价值的影响,本试验从地上青贮窖表面往下10、20、40、80、160和320cm处分别取样,进行青贮品质检测、营养成分分析和体外消化率测定。结果显示:(1)青贮窖表层(深度小于40cm)全株玉米青贮的真菌和乳酸菌含量高,总糖含量少,NDF、ADF和丁酸含量高,pH高;(2)随着深度增加,干物质、总糖和WSC含量、pH以及DMD逐渐降低,而乳酸、乙酸、NDF和ADF含量则升高,但粗蛋白和粗脂肪含量无明显变化。结果提示,夏季青贮窖中全株玉米青贮的品质、营养成分含量以及DMD既明显受简陋覆盖方式的影响,也明显受青贮窖深度的影响。This study evaluated the effect of simple covering of silo on the quality and nutritional value of whole-plant corn silage in summer.The silage samples were taken from 10,20,40,80,160 and 320 cm under the top surface of aboveground silo and analysed for their quality,nutritional composition and in vitro DM digestibility.The results showed that the whole-plant corn silage from 0 to 40 cm under the surface of the silo contained the higher population of fungi and lactobacilli,the higher content of NDF,ADF and butyric acid,the higher pH value,but the lower content of total sugars.Moreover,as sampling depths increased,the contents of DM,total sugars and WSC,pH values and DMD decreased gradually,but the contents of lactic acid,acetic acid,NDF and ADF increased,with the contents of crude protein and EE remaining unaffected.Therefore,both the simple covering of the silo and the depths under the top surface of the silo significantly affected the quality,nutritional composition and in vitro DM digestibility（DMD） of whole-plant corn silage in summer.

关 键 词：青贮窖 全株玉米青贮 营养价值 

分 类 号：S816.53[农业科学—饲料科学]