Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究饲喂巴氏杀菌β-内酰胺类抗奶对犊牛生长和胃肠道发育的影响。选用18头3日龄、体重相近的健康荷斯坦公犊，随机分为2组，对照组犊牛饲喂β-内酰胺类抗奶，试验组犊牛饲喂巴氏杀菌β-内酰胺类抗奶。试验抗奶巴氏杀菌的条件为：63～65 ℃加热30 min，犊牛60日龄断奶，试验期为180 d。结果表明：1）与β-内酰胺类抗奶相比，巴氏杀菌β-内酰胺类抗奶中总细菌、大肠杆菌和沙门氏菌数量均极显著降低（P0.05）；与对照组相比，试验组犊牛在60日龄时的十二指肠绒毛高度和绒毛高度/隐窝深度显著提高（P0.05）。由此可见，饲喂巴氏杀菌β-内酰胺类抗奶提高了犊牛哺乳期的生长发育，且在一定程度上能够促进犊牛的胃肠道发育，主要体现在促进小肠形态学的发育。
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究饲喂巴氏杀菌β-内酰胺类有抗奶对犊牛生长发育和血清免疫指标的影响。选用18头3日龄、体重相近的健康荷斯坦奶公犊牛，随机分为2组，对照组犊牛饲喂β-内酰胺类有抗奶，试验组犊牛饲喂巴氏杀菌β-内酰胺类有抗奶，每组9头。巴氏杀菌条件为63～65 ℃加热30 min，犊牛61日龄断奶，试验期为180 d。结果表明：1）与β-内酰胺类有抗奶相比，巴氏杀菌β-内酰胺类有抗奶中总细菌、大肠杆菌和沙门氏菌数量均极显著降低（P＜0.01）；2）与对照组相比，试验组犊牛在3～60日龄期间的平均日增重显著提高(P<0.05)；3）与对照组相比，试验组犊牛30日龄血清免疫球蛋白A（IgA）含量、15和30日龄血清免疫球蛋白M（IgM）含量均显著升高(P<0.05)，30日龄血清免疫球蛋白G（IgG）含量显著降低(P<0.05)，15日龄血清白细胞介素1β（IL-1β）含量显著升高(P<0.05)，7日龄血清白细胞介素6（IL-6）含量显著降低(P<0.05)。结果提示，饲喂经过巴氏杀菌的β-内酰胺类有抗奶提高了哺乳期犊牛的生长发育，且在一定程度上影响犊牛免疫系统，但无法确定有增强或抑制作用
Subjects: Biology >> Botany >> Applied botany submitted time 2018-07-23 Cooperative journals: 《广西植物》
Abstract： As the aging and degradation of Zanthoxylum planispimum var. dintanensis has affected the rocky desertification control, and in order to discuss the reason of aging and degradation of Zanthoxylum planispimum var. dintanensis, and realize the stabilization of forest stand and sustainable management, this paper took aging degraded plants with typical symbol of yellow blooms and normally grown plants as the research objects and adopted soil agrochemistry and environmental mineralogy methods to analyze mineral element content in root-zone soil of different plants, evaluate integrated soil quality and to reveal the mineral element mechanism of aging and degradation of Zanthoxylum planispimum var. dintanensis. The results shows that (1) C, P, K, S, Se, Sr, Mo and oxide in root-zone soil of normally grown plants were generally higher than the content in aging degraded plants, while total nitrogen, rapidly available phosphorus, available nitrogen, Cu, Pb, Zn and Cr had no significant difference, and other elements had no obvious change rule. It indicates that mineral elements are one of the causes of the aging and degradation of Zanthoxylum planispimum var. dintanensis. Available contents of elements also had an impact on plant growth, which indicates that we should improve availability of nutrients when managing the Zanthoxylum planispimum var. dintanensis. From the perspective of plant nutrition demand, all major, medium and micro elements had a dominant effect on soil quality. In the management of soil fertility, we should not only focus on a large number of elements. (2) Root-zone soil quality indexes manifested that the highest plant was No. 3 normally grown plant and the lowest plant was No. 1 aging degraded plant, suggesting that soil quality influences the aging and degradation of Zanthoxylum planispimum var. dintanensis. But the soil quality is not the only cause of aging degradation of Zanthoxylum planispimum var. dintanensis, and more comparative studies of soil microbes and plant hormones should be conducted. (3) When managing the Zanthoxylum planispimum var. dintanensis in forest stand, cultivate good soil structure, make sure the comprehensiveness and proportionality of soil nutrient, and pay attention to deficit effect caused by low mineral elements, and it is necessary to make sure the appropriate nutrient concentration and ratio to increase the absorption capacity of the plant.
Hits
Hits
Downloads
Comment