小体鲟和俄罗斯鲟苗培育技术初步研究

本文主要对小体鲟、俄罗斯鲟的苗种培育技术进行了初步研究，摸索了此阶段适宜养殖的环境因子，并对其生长情况进行了测定。结果表明：在同一饲养条件下，小体鲟全长、体重均超过俄罗斯鲟。苗种阶段成活率小体鲟为56％，俄罗斯鲟为49．6％。     

国内外可再生能源产业政策比较分析

开发利用可再生能源成为当今世界能源可持续发展战略的重要组成部分,世界各国纷纷制定出台了各种产业政策以推动各可再生能源的发展。本文在分析了各国可再生能源产业发展基本趋势的基础上,对国内外再生能源产业发展政策进行了系统的比较分析,并据此提出了推动中国可再生能源产业发展的政策建议。     

云南草坪地被植物真菌病害研究（六）

 报道云南草坪地被植物真菌病害11种,其中:国内新记录3种,省内新记录4种,省内已知种新分布4种。前二者有简要描述,后者列名录,供植检和植保工作参考。     

乙烯利和三十烷醇对黄瓜性别及其产量的影响

以黄瓜(Cucumis Sativus L.)为材料,在四叶期至性别定型前,于叶面两次喷施乙烯利.由初花期起在叶面三次喷施三十烷醇.试验证明,100,150和200mg/l乙烯利处理能提高雌雄比值,而对照则很低.     

红松人工用材林近自然经营技术的研究

以“近自然林业”为指导思想。采用实验生态学的方法,经过６ａ的伐孔实验证实了林隙对红松更新生长的有利作用,确定出树高与林隙孔径比为１：１～４：３时较利于林隙内红松的生长。据此通过理论生态学的方法,得出了５种地位级上单位面积不同白桦高度及白桦－红松经营复合体中白桦株数、林隙个数、林隙孔径、不同直径大小的红松株数及每个林隙中不同大小的红松株数等技术指标,为红松人工用材林的持续经营提供了科学的依据。     

畜禽基因图谱的构建及其应用

本文综述了畜禽基因图谱我建的分子遗传标记,回顾畜禽基因图谱构建的现况,同时提出在不久的将业基因图谱的我建会对动物育种、生命科学、生物技术及社会、经济带来重大影响。     

肺动脉高压与肉鸡腹水综合征发生发展的关系

２００只艾维茵商品代肉鸡常规育雏,１５日龄时随机分为两组,１００只在常规温度（２７～２３）℃下饲养,为常温组;１００只在低温（９～１１）℃环境中饲养,为低温组。利用右心导管法动态测定肺动脉压（ＰＡＰｍ）,并测定腹水心脏指数（ＡＨＩ）,统计各组腹水发生率。结果为：（１）分组后７、２１ｄ,低温组ＰＡＰｍ极显著高于常温组（Ｐ〈０．０１）;低温组腹水发生率显著高于常温组（Ｐ〈０．０５）。表明低温可引起肺动     

旅游活动对水土流失的影响

水土流失是一个全球性环境问题,引发和影响水土流失的因素是多方面的.人类活动更加剧了水土流失的严重程度.随着旅游业的发展,旅游活动对水土流失的影响日趋严重.首先分析了各种旅游活动及相关服务设施对水土流失的不利影响,探讨了旅游活动强度及其对水土流失影响程度的相互关系,建立了旅游活动对水土流失的影响模型,并据此提出了旅游风景区水土流失防治与管理对策.     

生姜组培苗的培育及其生产应用

利用组织培养技术,对生姜进行茎尖培养,筛选出适合丛生芽快速繁殖的培养基配方（MS+6-BA2.0mg/L+NAA0.1mg/L）;对生姜组培苗进行炼苗和移栽试验,结果炼苗提高移栽成活率的作用最大,壮苗加炼苗移栽成活率最高,可达100%;组培苗生产的一代姜,姜块小、姜体健康,适宜用作种姜;二代姜姜块大、产量高,商用价值与经济效益好。     

Effects of Bacillus subtilis on jejunal integrity,redox status,and microbial composition of intrauterine growth restriction suckling piglets

The present study used intrauterine growth restriction (IUGR) piglets as an animal model to determine the effect of Bacillus subtilis on intestinal integrity, antioxidant capacity, and microbiota in the jejunum of suckling piglets. In total, 8 normal birth weight (NBW) newborn piglets (1.62 ± 0.10 kg) and 16 newborn IUGR piglets (0.90 ± 0.08 kg) were selected and assigned to three groups. Piglets were orally gavaged with 10-mL sterile saline (NBW and IUGR groups), and IUGR piglets were orally gavaged with 10-mL/d bacterial fluid (B. subtilis diluted in sterile saline, gavage in the dose of 2 × 10⁹ colony-forming units per kg of body weight; IBS group; n = 8). IUGR induced jejunal barrier dysfunction and redox status imbalance of piglets, and changed the abundances of bacteria in the jejunum. Treatment with B. subtilis increased (P < 0.05) the ratio of villus height to crypt depth (VH/CD) in the jejunum, decreased (P < 0.05) the plasma diamine oxidase (DAO) activity, and enhanced (P < 0.05) the gene expressions of zonula occludens-1 (ZO-1), occludin, and claudin-1 in the jejunum of IUGR piglets. Treatment with B. subtilis decreased (P < 0.05) the concentration of protein carbonyl (PC) and increased (P < 0.05) the activities of catalase (CAT) and total superoxide dismutase (T-SOD) in the jejunum of IUGR piglets. Treatment with B. subtilis also increased (P < 0.05) gene expressions of superoxide dismutase 1 (SOD1), CAT, and nuclear factor erythroid 2-related factor (Nrf2), as well as the protein expressions of heme oxygenase-1 (HO-1), SOD1, and Nrf2 in the jejunum of IUGR piglets. Treatment with B. subtilis also improved the abundances and the community structure of bacteria in the jejunum of IUGR piglets. These results suggested that IUGR damaged the jejunal barrier function and antioxidant capacity of suckling piglets, and altered the abundances of bacteria in the jejunum. Treatment with B. subtilis improved the intestinal integrity and antioxidant capacity while also improved the abundances and structure of bacteria in the jejunum of suckling piglets.