海区欧洲鳗网箱养殖中密度等因素对鳗鱼生长的影响

在盐度２４－２７‰的海水中，用大小不同的网箱对不同规格欧洲鳗进行了不同的养殖密度的生长比较。结果表明，欧洲鳗在海区网养养殖条件下可以正常摄食生长，６０天饲养期最高产量达６１．８ｋｇ／ｍ＾２，增重量达３４．５ｋｇ／ｍ＾２，增重率为１２６．６％，在一定范围内密度、网箱大小对其生长速度无明显影响，大体上体小的鳗种，生长速度快，但２５ｇ／尾以上鳗鱼，增重率上的差异并不明显。     

一步RT-PCR检测南芥菜花叶病毒方法的建立

本研究采用Trizol快速提取植物叶片总RNA，通过GeneBank设计特异性引物，并利用一步RT—PCR技术，最终建立了一套比较实用的检测ArMV的方法。该方法对于其它病毒的检测同样具有借鉴意义。     

玉米株高QTL定位研究进展

株高作为玉米的重要农艺性状,对产量、耐肥性、抗倒伏影响显著。随着分子生物学的发展,针对玉米株高性状开展了大量研究工作。总结玉米株高相关的QTL定位和基因克隆研究进展,并采用元分析技术对187个信息完整的玉米株高QTL定位结果进行整合分析,获得10个一致性QTL,并在一致性QTL置信区间内发掘可能参与玉米株高调控的候选基因。     

新型氮-磷-硫/单分散二氧化硅复合阻燃剂的阻燃效果

通过利用各元素之间的协效作用,在二氧化硅表面与氮、磷、硫元素发生接枝共聚制备成氮-磷-硫/二氧化硅（N-P-S/SiO₂）复合阻燃剂,用来对竹基板材进行改性处理,研究其对板材的阻燃性能。结果显示,经N-P-S/SiO₂复合阻燃剂处理的竹板材载药能力及阻燃性能均优于浸渍N-P-S处理的样品,随着时间的增加竹板材的载药量呈现出先上升后趋于稳定的变化趋势;TG/DTG结果显示,经N-P-S/SiO₂复合阻燃剂处理的样品有较高的残炭量（32.1%）及热稳定性。     

遂昌县油茶资源现状与产业发展对策

油茶又名茶子树,是世界四大木本油料植物之一,是我国特有的主要木本食用油料树种,从中提取出的绿色无公害茶油在市场上供不应求。榨油剩下的茶饼还是制作抛光粉及复合饲料的优质原料,茶壳也可以制成活性炭式有机肥,油茶对人们的健康非常有益,还能增加农民收入,通过对浙江省遂昌县油茶资源现状进行统计分析,指出当前油茶产业发展中存在的问题,并提出了今后油茶产业发展的对策和建议。     

Influence of Light Sources Color on Tunnel Lighting

Five color temperature LEDs were compared to traditional light sources (HPS and MH) under three lighting levels and negative contrasts to study the effect of light sources color on tunnel lighting. Through the experiment of reaction times, the relation between light sources color and reaction times, and the relation between light sources color and pupil size were studied, respectively. The experiment result shows that visual performance and cirtopic with high color temperature LED are the most significant under high lighting level. The visual performance and cirtopic with middle color temperature LED are the most significant under mesopic lighting level. It is shown that comprehensive influence of light sources color on visual performance and cirtopic must be considered for choosing appropriate light sources in different sections of tunnel lighting.     

木材内热质耦合传递的第二定律分析

根据热力学第二定律和非平衡热力学原理,推导出木材中由于热质传递引起的熵产的表达式。分析表明:在一般情况下,和单独的热质传递相比,由于热质传递的耦合作用引起的熵产可忽略不计。     

基于MaxEnt模型和GIS技术的烟粉虱适生区预测

为分析烟粉虱Bemisia tabaci在我国的潜在适生区,以我国351个烟粉虱分布记录点、全国气候环境数据和土地利用数据为基础,利用MaxEnt生态位模型结合GIS技术进行烟粉虱适生区预测。结果表明,影响烟粉虱适生区预测的主要因子包括土地利用类型、海拔、年平均温度和最热月份最高温度。预测的烟粉虱高适生区、中适生区、低适生区与非适生区分别占全国陆地总面积的5.6%、12.3%、35.2%和46.9%。华北平原、东北平原的南部以及湖南、湖北两省交界处为烟粉虱最适宜生存区域,且这些区域作物生产潜力大,造成的损失较为严重;非适生区包括青藏高原、南疆沙漠区域、大兴安岭及东北极寒地区。本研究预测的烟粉虱中、高适生区域均有烟粉虱发生为害的报道,烟粉虱在我国的防控形势仍然严峻。     

Genetic analysis of Phytophthora sojae populations in Fujian, China

Phytophthora sojae is a destructive soilborne pathogen causing seedling damping‐off and root rot of soybean (Glycine max). The goal of this study was to determine the genetic structure of P. sojae populations in Fujian, China. Nine microsatellite markers were used to investigate the genetic variation in 19 P. sojae populations, sampled from Fujian Province and northeastern China (Jilin and Heilongjiang Provinces) between 2002 and 2013. Overall, a low genetic diversity, Hardy–Weinberg disequilibrium, and an index (an index of association) that was significantly different from zero were detected in populations; these results were consistent with self‐fertilization and clonal modes of reproduction for this pathogen. However, using Bayesian Markov chain Monte Carlo approach, principal component analysis and neighbour joining (NJ) algorithm, the Fujian P. sojae populations clustered into three distinct groups, one of which included most isolates of the northeast populations. What is more, significant estimates of pairwise fixation indices (F_ST) were detected between most populations, especially in different clusters. It is hypothesized that the cropping system used, the limited dispersal ability, and human‐mediated gene flow may account for the observed genetic structure of P. sojae populations in Fujian, China. In addition, a high virulence frequency of the pathogen on different cultivars carrying known major R genes for resistance, and a rapid increase in virulence frequency, indicated that these major R genes should not be used to manage seedling damping‐off and root rot diseases of soybean (Glycine max).     

Synthesis and anticoccidial activities of novel ethyl 6-aryloxy-7-bromo-4-hydroxy-3-quinolinecarboxylate against Eimeria tenella

A series of novel 7-bromo substituted derivatives of quinolinecarboxylate (4a-i) have been synthesized with short synthetic route and high yields. The structures were confirmed by ¹H NMR, IR and MS. Anticoccidial activities of these compounds were evaluated according to the ACI (the anticoccidial index) method. The results indicated that four of the tested compounds (4a, 4b, 4e and 4g) exhibited anticoccidial activities obviously against Eimeria tenella at a dose of 27 mg kg⁻¹ in the chicken’ diet. In particular, the anticoccidial index of compound 4b (introduction 4-bromophenoxy at C-6 and bromine atom at C-7 of quinolinecarboxylate) was 170.0, which indicated that this compound has high anticoccidial activity.