2000—2010年“一带一路”沿线林地变化

基于欧洲宇航局全球气候变化计划(Climate Change Initiative)2000、2010年土地利用数据,对"一带一路"沿线林地变化进行了分析。结果表明:2000—2010年"一带一路"沿线林地呈下降趋势。俄罗斯、东南亚大部分国家以及印度等林地面积下降突出,仅中国林地面积呈增加趋势。林地转为耕地(52 473 km~2)和草地(14 848 km~2)是主要转出类型,耕地转为林地(19 539 km2)以及林地内部转移(386.55 km~2)是主要转入类型。俄罗斯和中国林地转入面积较大(>20 km~2),南亚的印度、孟加拉国,东南亚的马来西亚、印度尼西亚、泰国以及俄罗斯等林地转出面积较大(>2 000 km~2)。     

济宁市兖州区农机安全现状与对策

通过对济宁市兖州区农业机械的基本情况、事故伤害情况进行分析,给出了相对应的建议与对策。      

富马酸及其与甲酸钙复配替代抗生素对川藏黑猪日粮酸结合力及生产性能的影响

试验旨在评价富马酸及富马酸与甲酸钙复配剂取代饲用抗生素对川藏黑猪日粮酸结合力(ABC)及猪生产性能的影响。选用(52.36±9.76)kg左右健康黑猪50头,按体重、性别随机分为5个处理,每处理4重复,分别饲喂无抗负对照、抗生素正对照1(恩拉霉素+硫酸粘杆菌素)、抗生素正对照2(吉他霉素+硫酸粘杆菌素)、0.5%富马酸(FA)、0.5%的富马酸与甲酸钙复配剂产品(FA+CF)日粮。结果表明,与负对照比较,FA及FA+CF极显著降低饲料p H值及饲料ABC值(P=0.00)。28 d饲养试验结果表明,日粮处理的生产性能差异未达统计学显著水平(P≥0.05),但与负对照比较,FA及FA+CF处理日增重分别降低5.7%、3.5%,料重比(FCR)分别上升4.3%、8.4%;而正对照1、2比负对照日增重分别提高8.98%、5.38%,FCR分别降低4.74%、上升1.70%。与负对照比较,FA处理还导致猪腹泻率及腹泻指数显著(P0.05)或极显著(P0.01)上升,FA及FA+CF处理分别降低养殖经济效益16.2%、15.13%。此结果显示,0.5%富马酸及0.5%的富马酸与甲酸钙复配剂不能起到饲用抗生素的促生长作用。     

橄榄多酚类物质研究进展

橄榄是中国传统的药用植物，其中多酚类物质是橄榄重要的功效成分之一。目前，橄榄多酚类物质研究较为 广泛，常用的提取方法包括温浸法、超声波辅助提取法、微波辅助提取法、超声与微波协同辅助提取法等，分离纯化 后采用液相色谱或液质联用技术鉴定多酚类物质的种类和成分，并对其抗氧化、抗病毒、抗菌消炎、抗癌抑癌、解酒 护肝和提高机体免疫等方面的药理活性进行验证。此外，橄榄多酚类物质合成和代谢分子机理也已经被初步阐释。基 于上述研究报道，本文进一步对橄榄多酚类物质后续研究方向和产业化开发利用前景进行展望。     

Effects of Dietary Supplementation of Barodon on Growth Performance,Innate Immunity and Disease Resistance of Juvenile Olive Flounder,Paralichthys olivaceus,Against Streptococcus iniae

This study was conducted to evaluate the effects of dietary supplementation of Barodon, an anionic alkali mineral complex, on growth, feed utilization, humoral innate immunity and disease resistance of olive flounder. A basal experimental diet was used as a control and supplemented with 0.1, 0.2, 0.3, 0.4, or 0.5% Barodon. Triplicate groups of fish (26.4 ± 0.2 g) were fed one of the diets to apparent satiation twice daily for 10 wk. The growth performance was enhanced (P < 0.05) linearly and quadratically in fish fed diets containing Barodon compared with that in fish fed the control. Feed utilization was significantly improved by Barodon supplementation. Serum lysozyme and antiprotease activities were increased quadratically in Barodon fed groups. Also, significantly higher superoxide dismutase activity was found in Barodon‐fed fish. Dietary supplementation of 0.1–0.3% Barodon resulted in significant enhancement of fish disease resistance against Streptococcus iniae. The findings in this study indicate that dietary supplementation of Barodon can enhance growth, feed utilization, innate immunity, and disease resistance of olive flounder and that the optimum level seems to be 0.1% in diets.     

Ultrastructural impairment of islet microvascular endothelial cells in STZ-induced type 1 diabetic mice

AIM: To investigate the ultrastructural changes of islet microvascular endothelial cells in STZ-induced type 1 diabetic mice. METHODS: BALB/c mice were randomly divided into diabetic group and control group. The expression of insulin and platelet-endothelial cell adhesion molecule-1 (CD31) in islet microvessels was detected by immunohistochemical staining. The ultrastructural changes of islet β cells and islet microvessels were observed under transmission electron microscope. RESULTS: Compared with control group, the number of islet β cells, ratio of β cells/α cells, average number of secretory granules in β cells and insulin expression area per islet in diabetic group were significantly decreased (P<0.01). Besides, diabetic group had fewer microvessels with lower expression of CD31 (P<0.01). Mitochondria in islet microvascular endothelial cells and pericytes in diabetic group were swelling. The basement membrane of islet microvessels became thicker in diabetic group (P<0.01). CONCLUSION: Islet microvascular endothelial cells were impaired in type 1 diabetic mice.     

云南省昆明市执业兽医考试现状及管理措施

昆明市通过加强考务工作,积极宣传动员,建立长效机制等举措,近年来执业兽医考试工作成效显著,2010—2018年昆明市执业兽医累计报考4 819人,其中(助理)执业兽医师共考取通过1 222人。通过对2010—2018年的考试情况分析发现:昆明市报考人数逐年上升,学历水平不断提升;报考人员职业以动物诊疗机构、学生、非兽医从业人员为主;报考人员通过率以科研教育人员、诊疗机构、学生等居前列。上述情况提示,今后应进一步优化执业兽医注册备案管理,强化行业对执业兽医的重视与认可,完善执业兽医考试和继续教育制度。     

优质黑猪育种30年工作体会

品种是影响养猪生产中的最重要因素,猪育种是一项复杂且系统的工程,文章从育种素材筛选、育种方案设计、育种方法选择、品种审定以及扩群产业化推广等方面进行详细的阐述,并结合育种经验提出相应猪育种建议。     

转角法施工镀锌高强螺栓关键技术

常州现代传媒中心主塔楼屋顶高88 m的钢塔(塔桅钢结构)设计工艺复杂,施工难度极大,所有钢构件均进行热浸锌防腐处理,采用8.8级热浸锌高强螺栓连接。考虑到钢结构拼接节点热浸锌高强螺栓的安装质量直接影响塔桅钢结构的安全和稳定,通过对热浸锌高强螺栓施工工艺进行反复论证、试验,最终确定采用转角法施工热浸锌高强螺栓,取得了理想的施工效果,确保了工程施工质量。