不同部位、高度处理及青贮期对河套地区巨菌草营养品质的影响  

Effect of nutrient quality in different parts,height treatments,and silage time of Cenchrus fungigraminus in Hetao area

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作  者:杨东升 牛誉驰 杨宇飞 焦欣磊 郝水源 YANG Dong-sheng;NIU Yu-chi;YANG Yu-fei;JIAO Xin-lei;HAO Shui-yuan

机构地区:[1]河套学院农学系,内蒙古巴彦淖尔015000 [2]河套地区绿色农产品安全生产与预警控制内蒙古自治区高等学校重点实验室,内蒙古巴彦淖尔015000 [3]河套学院内蒙古西部土壤资源综合利用与生态环境研究中心,内蒙古巴彦淖尔015000 [4]乌兰察布市农业科学研究所,内蒙古乌兰察布012209

出  处:《饲料研究》2024年第17期128-132,共5页Feed Research

基  金:内蒙古自治区高等学校科学研究重点项目(项目编号:NJZZ23098);巴彦淖尔市科技计划资助项目(项目编号:K202108);内蒙古自治区“科技兴蒙”行动重点专项(项目编号:NMKJXM202201)。

摘  要:为探索河套地区巨菌草作为优质牧草的营养品质状况,开发其潜在的饲用价值。试验对1.0 m高的巨菌草全株、叶片、茎秆,以及株高为1.3~2.5 m和留茬高度为0~20 cm全株巨菌草的常规营养成分分别进行了测定。对株高1.6 m的全株巨菌草进行青贮试验,测定青贮后巨菌草常规营养成分含量及pH值、氨态氮(NH3-N)浓度、可溶性糖(WSC)含量。结果显示:巨菌草各部位饲用价值高低顺序依次为叶片>全株>茎秆;刈割高度为1.3~1.6 m的全株巨菌草营养成分含量较高;留茬高度为10~15 cm时,下一茬巨菌草的营养品质表现较优。青贮过程中,随着青贮时间延长,巨菌草粗蛋白(CP)和粗灰分(CA)含量呈逐渐上升趋势,干物质(DM)、中性洗涤纤维(NDF)、可溶性糖(WSC)含量及pH值呈逐渐下降趋势;青贮30 d时,氨态氮NH3-N浓度最高。研究表明,巨菌草叶片饲用价值优于其茎秆,留茬高度和刈割高度对巨菌草的营养品质与产草量产生明显影响,且通过青贮能够提升巨菌草的营养水平。In order to explore the nutritional quality of Cenchrus fungigraminus as a high-quality forage in Hetao area and develop its potential feeding value.In the experiment,the contents of nutrients in the samewhole plant,leaves,stems with a height 1.0 m and whole plants with plant with a height of 1.3 to 2.5 m,and stubble height of 0 to 20 cm were determined.The silage test was carried out on the whole plant with 1.6 m height to determine the content of conventional nutrients,pH value,NH3-N concentration and soluble sugar(WSC)content after silage.The results showed that the feeding value of each part was in the order of leaves>whole plant>stem.The nutrient content in Cenchrus fungigraminus with cutting height of 1.3 to 1.6 m was higher.When the stubble height was 10 to 15 cm,the nutritional quality of the next crop was better.During silage,the contents of crude protein(CP)and crude ash(CA)increased gradually,while the contents of dry matter(DM),neutral detergent fiber(NDF),soluble sugar(WSC)and pH value decreased gradually with the extension of silage time.The concentration of NH3-N was the highest when silage lasted for 30 days.The research revealed that the feeding value of the leaves was better than the stems,and the stubble height and cutting height had significant effects on the nutritional quality and yield of the Cenchrus fungigraminus.The nutritional level of the Cenchrus fungigraminus can be improved through silage fermentation.

关 键 词:巨菌草 刈割高度 留茬高度 青贮时间 营养品质 

分 类 号:S816.7[农业科学—饲料科学]

 

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