灌溉对青贮玉米营养价值和发酵品质的影响

Effect of irrigation on nutritional value and fermentation quality of corn silage

水资源短缺是冀西北地区的主要特征,本文通过田间试验研究充分灌溉、节水15%灌溉、节水30%灌溉3种不同灌溉方式对巡青518产量、营养成分及玉米青贮饲料品质的影响,研究表明,不同灌溉制度对青贮玉米产量、产奶指数、农艺性状、营养成分都有一定影响,其中充分灌溉和节水15%灌溉的青贮玉米鲜草生物产量、干物质产量、产奶指数、株高、茎粗、穗位都极显著的大于节水30%灌溉的青贮玉米(P<0.01),充分灌溉的青贮玉米鲜草生物产量、干物质产量、产奶指数株高、穗位都大于节水灌溉15%的青贮玉米,但差异不显著(P>0.05),节水灌溉15%的青贮玉米茎粗显著大于充分灌溉和节水30%灌溉的青贮玉米(P<0.05);节水灌溉15%可以提高青贮玉米的粗蛋白质、粗脂肪、粗灰分、水溶性碳水化合物的含量,降低粗纤维、酸性洗涤纤维、中性洗涤纤维的含量,与其他两种灌溉制度相比差异不显著(P>0.05);不同灌溉制度对玉米青贮饲料的发酵品质影响不大。因此,在玉米青贮栽培过程中可以进行适当的节水灌溉来提高青贮玉米的质量和节约水资源。

The shortage of water resources is the main feature of Northwest Hebei Province,This paper studies the effects of three different irrigation methods:full irrigation,15%water-saving irrigation,and 30%water-saving irrigation on the yield,nutrients and corn silage quality of Patrol 518 through field experiments.The research shows that:The yield,milk production index,agronomic characteristics,and nutrient content of silage corn have a certain influence.Among them,the biological yield,dry matter yield,milk production index,plant height,stem diameter,The ear position is significantly larger than the 30%water-saving silage corn(P<0.01),and the fully irrigated silage corn fresh grass biological yield,dry matter yield,milk production index,plant height,and ear position are 15%higher than water-saving irrigation However,the difference is not significant(P>0.05).The stalk diameter of silage corn under 15%water-saving irrigation is larger than that under full irrigation and 30%water-saving silage corn.The difference is significant(P<0.05);15%water-saving irrigation can improve The content of crude protein,crude fat,crude ash,and water-soluble carbohydrates of silage corn reduces the content of crude fiber,acid detergent fiber,and neutral detergent fiber.Compared with the other two irrigation systems,the difference is not significant(P>0.05);Different irrigation systems have little effect on the fermentation quality of corn silage.The results showed that during the cultivation of corn silage,proper water-saving irrigation can be carried out to improve the quality of corn silage and save water resources.