加快我国渔业科技成果培育产出对策研究

渔业科技成果培育产出对于提高渔业综合生产能力、调整优化产业结构、促进现代渔业可持续发展具有根本性作用.促进渔业科技成果培育产出是一项长期的系统工程,面对"十二五"及今后一个时期国家稳步增加科技投入的有利形势,客观总结取得的成绩,分析存在的问题,探讨加快渔业科技成果培育和产出的具体对策,对于进一步提高科研效率,推动现代渔业建设是十分必要的.     

Transportation and Transformation of Pollutants in a New Type Constructed Wetland

A three stage series operational pilot scale constructed wetland was built for domestic wastewater treatment with inflow of 4.5 m3/d .The mass balance method was adopted to quantify the transportation and transformation of pollutants in constructed wetland during steady state operation.It was shown that the average removal rate of CODcr was 87.14%, in which 68.45% contributed by dissimilation and 18.69% contributed by assimilation.The average removal rate of TN was 60.21% and the contributions of denitrification and microbial assimilation or plant assimilation were 53.64%, 5.39% and 1.18%, respectively.The average removal rate of TP was 59.36% and the contributions of substrates absorption and microbial assimilation or plant assimilation were 43.55%, 12.26% and 3.55%,respectively.In conclusion, microorganisms played a key role in the removal of pollutants and substrates adsorption was the main approach to phosphorus removal.     

棉花生产年景的预测预报及对策

采用灰色系统ＧＭ（１，１）、ＧＭ（１，Ｎ）模型和多元回归方法，对聊城地区１９５７～１９９２年的棉花产量及４～１０月的天气气候资料进行相关分析，找出了影响棉花生产的主要气象因子。利用单产对棉花生产年景进行了历史拟合和预测预报检验，均收到了良好的效果，并结合典型年例提出相应的对策。     

基于SEM三江平原湿地生态系统健康与扰动因素分析

依据三江平原湿地生态系统特点,用SPSS20.0和Lisrel8.7软件建立了结构方程模型。根据结构方程模型分析,确定湿地生态系统健康的主要影响因子及其相互关系。结果表明:自然扰动和人类扰动,直接影响湿地自我免疫与抗扰动能力的发挥;湿地自我免疫与抗扰动能力,又影响湿地满足人类社会需求能力,具有中介变量的属性。湿地满足人类社会需求能力,是湿地生态系统健康的直接表现;湿地自我免疫与抗扰动能力,是湿地生态系统健康的间接反映。     

Dietary resistant starch ameliorating lipopolysaccharide-induced inflammation inmeat ducks associated with the alteration in gut microbiome and glucagon-like peptide 1 signalingOA

Background: Consumption of resistant starch(RS) has been associated with various intestinal and systemic health benefits, but knowledge of its effects on intestinal health and inflammatory response in stressed birds is limited.Here, we examined how dietary RS supplementation from 12% raw potato starch(RPS) modulated inflammatory severity induced by lipopolysaccharide(LPS) in meat ducks.Results: LPS administration at 14, 16, and 18 d(chronic challenge) decreased body weight(BW) and glucagon-like ...     

简述我国水产种业发展现状、问题与展望

种业是国家战略性、基础性核心产业.习近平总书记指出"要下决心把我国种业搞上去,抓紧培育具有自主知识产权的优良品种,从源头上保障国家种业安全".我国是世界第一水产养殖大国.2019年,我国水产养殖总产量已经超过5000万吨,为增加城乡居民优质动物蛋白供应、保障我国食物安全和促进全球水产品有效供给作出了重要贡献.面向未来,...     

Propionate stimulates the secretion of satiety hormones and reduces acute appetite in a cecal fistula pig model

Short-chain fatty acids(SCFA) can regulate appetite by stimulating the secretion of satiety hormones.However, the impact of short-chain fatty acid propionate on the release of gut satiety hormones and appetite regulation in pigs is not completely understood. In this study, 16 pigs were infused with saline or sodium propionate through a fistula in the caecum during a 28-day experimental period. We characterized the effects of propionate administration on peptide YY(PYY) and glucagon-like peptide ...     

越南茶树新品种叶片解剖结构特点研究

本实验对三个越南茶树新品种的叶片解剖结构特点进行了研究分析,观测了茶树叶片第一叶、第二叶、第三叶的叶片厚度、上表皮厚度、棚栏组织厚度和腺鳞（多毛）密度.结果表明：抗旱最好的茶树品种是KimTuyen,其次是PH10,最后是PH8;品种抗旱性与叶片厚度、上表皮厚度、棚栏组织厚度呈显著正相关,特别是与叶片厚度呈极显著正相关（r=0,8142＊＊,P＜0,01）.初步结论：PH10、KimTuyen品种适制绿茶和乌龙茶;PH8品种造制绿茶.     

大力推广高产优质木薯新品种是解决海南饲料问题的有效途径

木薯是热带地区重要的粮食、饲料作物。海南种植木薯条件优于全国各省区，栽培面积占全国的５％，产量占全国总产量的１１％。长期来，海南饲料紧缺，大力推广高产优质木薯优良新品种，是解决我省饲料问题的一条有效途径。     

大兴安岭林木良种基地鼠害综合治理初探

黑龙江省大兴安岭技术推广站于2001年建成,有林木良种基地725公顷,主要树种为兴安落叶松、樟子松、红皮云杉、鱼鳞云杉、杂种落叶松、甜杨、春榆等,为实现林木良种生产基地化奠定了基础.2009年秋冬季,该良种基地鼠害突发,鼠口密度每公顷多达8只,平均被害率为5.6％,个别严重地段被害率达17.8％.该站针对鼠害突发的实际情况,采取了多种防治措施,有效地控制了害鼠种群数量.