刈割时间对青贮玉米秸秆饲料营养成分的影响  

Effect of maturity of corn stalk on the chemical characteristics and nutritive value of silage

作　　者：余汝华[1] 莫放[1] 赵丽华[1] 张晓明[1] 王维谦 马红 赵建营 

机构地区：[1]中国农业大学动物营养学国家重点实验室,北京100094 [2]大曹庄管理区奶牛发展中心,河北邢台055550

出　　处：《中国农学通报》2006年第6期10-13,共4页Chinese Agricultural Science Bulletin

基　　金：国家"十五"科技攻关计划项目"饲料资源开发与产业化利用关键技术研究"(2004BA514A11-04)--"玉米秸秆产业化利用技术研究"(2004BA514A11-04)。

摘　　要：国外较多的研究是从整株玉米青贮的角度研究不同品种和收获成熟期对青贮饲料营养价值的影响,而国内对青玉米秸秆青贮的研究报道多涉及提高青贮饲料的品质,为此试验选用收刈时间(生长期)为92、94、96、98、100、102和104d的高油115玉米青秸秆调制青贮饲料,研究玉米秸秆收刈时间对青贮饲料营养成分的影响,结果表明收刈时间明显影响青贮饲料的氨态氮、CP和NDF含量,尤其是明显影响青贮饲料的有机物体外降解率,收刈时间对青玉米秸秆青贮饲料的乳酸、丁酸含量和ADF含量没有明显的影响(p>0.05)。The influence of maturity on nutritive composition was determined for different stage of seven silage of corn stalk. The corn stalk were harvested at the growth days of the 92^nd, 94^th, 96^th, 98^th, 100^th, 102^nd and 104^th, respectively. At each stage of maturity, corn stalk was harvested, and ensiled. Maturity did not have a large effect on lactic acid, butyric acid and ADF content of silage in this study; however, the digestibility of organ matter in vitro decreased as maturity of corn stalk, there were obvious effects on the contents of ammonia concentrations, crude protein, NDF in silage with different harvested time.

关 键 词：青贮饲料 收刈时间 玉米秸秆 乳酸 氨态氮 

分 类 号：S816.53[农业科学—饲料科学]