烟粉虱为害特点及防治方法

烟粉虱（B生物型）Bemisia tabaci（Gennadius）属于同翅目,粉虱科,小粉虱属。成虫体长约0．9mm,翅展约2mm。体翅覆盖白蜡粉,虫体淡黄色。我市蔬菜是以果菜类、叶菜类生产为主的,这些蔬菜又是烟粉虱喜好的寄主,因此我们要提高对烟粉虱的认识,防治观念,将其消灭在“萌芽”状态。     

海水养殖与气象Ⅰ——石斑鱼低温寒害指标试验研究

本研究可揭示不同大小石斑鱼抗寒性差异及其机体应激反应,探索斜带石斑鱼生存的临界温度,为石斑鱼养殖选择合理放养周期、寒害风险评估、制定防寒减灾决策提供科学依据。试验以5、200、600 g/尾斜带石斑鱼为研究对象,通过逐渐降低水温并记录不同水温下的存活情况,并测定其超氧化物歧化酶含量。结果表明：（1）石斑鱼小鱼轻度寒害指标为水温11℃,持续1天,中度寒害指标为水温10℃,持续时间1~2天,重度寒害指标为10℃,持续3天。中鱼的轻度寒害指标为14℃,持续1天,中度寒害指标12℃,持续1天,重度寒害指标为11℃,持续1天。大鱼的轻度寒害指标为15℃,持续1~2天,中度的寒害指标为15℃,持续3天,重度寒害指标为14℃,持续1天;（2）小石斑鱼在低温刺激下,肝和鳃SOD显著提高,中鱼鳃SOD显著下降,而肝SOD先升高后下降,大鱼肝SOD和鳃SOD都先升后降,但整体活性水平相对稳定。     

巍山县2022年晚秋青贮玉米品种筛选试验

为进一步探索“烤烟+”多种复合种植模式,促进“烤烟+”产业健康可持续发展,增加烟农收入,保障粮食安全。在烟区开展烟后种植青贮玉米品种筛选试验,筛选适宜巍山县种植的优势明显、表现稳定的青贮玉米品种。通过田间试验,对14个青贮玉米品种生育期、主要农艺性状、抗逆性、丰产性等进行试验观察、考量和分析。结果表明,青贮玉米品种布谷鸟33、云黄3号、同玉008、五谷1790、文研195综合表现好,优势明显。     

莱芜市姜田土壤存在问题及防治措施

分析了莱芜市生姜种植中的土壤生产现状,指出姜田土壤酸化、盐渍化的危害,提出防治措施,以提高生姜产量和品质。     

三个水稻联乙烯还原酶基因突变体的比较研究

 【Objective】 The present study was aimed at investigating the differences of mutant phenotypes resulting from different mutations in base sequence of rice divinyl reductase gene OsDVR (Os03g22780), and evaluating application potential of this gene in rice breeding as a leaf color marker gene. 【Method】The yellow-green leaf mutants isolated from Indica rice variety G46B and japonica rice variety Nipponbare via ethyl methanesulfonate mutagenesis were detected using high-performance liquid chromatography (HPLC) to screen the mutants accumulating divinyl chlorophyll. Then genetic analysis, gene mapping and allelism test of the target mutants were performed. Subsequently, DNA sequencing of OsDVR gene in these mutants and alignment of the deduced amino acid sequences of homologous DVR proteins were conducted, and leaf photosynthetic pigments, plant phenotypes and main agronomic traits of the mutants were investigated. 【Result】590ys and 525ys, two novel mutants accumulating divinyl chlorophyll, were obtained by screening 53 yellow-green leaf mutants isolated from ethyl methanesulfonate mutagenesis. Their mutant phenotypes were all controlled by a pair of recessive nuclear gene and moreover, the mutant genes were all mapped on the chromosomal region harbouring the 824ys mutant gene reported. Furthermore, allelism test confirmed that the mutant genes of 590ys and 525ys were allelic to that of 824ys. So 590ys, 525ys and 824ys mutants were all OsDVR mutants. However, mutational sites of OsDVR mutant gene and their encoded protein product in the three mutants were different, which resulted in extremely significant differences of chlorophyll contents and compositions, plant phenotypes, main agronomic traits and yields per plant among the three mutants. Among them, 525ys mutant had slight yellow leaves, and its growth and development, main agronomic traits and yield per plant were affected relatively less, indicating that 525ys mutant gene can basically meet the requirements as a leaf color marker gene introduced into rice male sterile lines. 【Conclusion】Different mutations in base sequence of OsDVR gene could result in extremely significant differences of mutant phenotype and yield per plant. The OsDVR mutant gene could be applicable in hybrid rice breeding as a leaf color marker gene.     

基于导数光谱的小麦冠层叶片含水量反演

【目的】以高光谱技术实现小麦含水量信息的快速、无损与准确获取,为小麦灌溉的精确管理提供科学依据。【方法】利用水氮胁迫试验条件下小麦主要生长期的导数光谱构建了16种新指数,将其与NDII、WBI以及NDWI等常用指数进行比较分析,筛选小麦叶片含水量反演最佳光谱指数,并利用其建立反演模型进行小麦含水量的遥感填图。【结果】在各指数中,FD730-955对小麦冠层叶片含水量的估测结果最佳,其估测模型（对数形式）校正决定系数（C-R2）与检验决定系数（V-R2）分别达0.749与0.742,优于NDII等常用指数;FD730-955所建模型对32个未知样的预测结果与实测值相似度较高,其回归拟合模型R2达0.763,RMSE仅为0.024,取得了良好预测结果,且对叶片含水量以及LAI值较高与较低的样本均具备良好的预测能力,可有效避免样本取值范围以及冠层郁闭度等因素对含水量估测的影响;反演模型对OMIS影像的填图结果与地面实测值拟合模型R2达0.647,RMSE仅为0.027,具有较高的反演精度。【结论】导数光谱可实现小麦冠层叶片含水量信息的准确估测,其中FD730-955系反演的优选指数。     

脂肪酶及其在饲料工业中的应用研究

脂肪酶是一种重要的工业用酶,广泛应用于食品、纺织、化工、医药、饲料和能源等领域。目前,脂肪酶应用于饲料工业的研究相对较少。文中就脂肪酶近年来在饲料工业中的应用研究做简要的综述,为今后脂肪酶在饲料中的开发应用提供参考。     

1052H19PS版铝板基制备工艺研究

介绍了105ZH19PS版铝板基的制备工艺,并测量了试样的表面粗糙度,分析了其显微结构、力学和电解腐蚀性能。结果表明：（1）经过中间退火后的试样其内部的晶格畸变较弱、位错较少,比未经过退火处理的试样强度低、塑性好;（2）中间退火后的试样的表面晶粒较细小、第二相较多,且分布较均匀,其电解腐蚀性能比未经过退火的试样高。     

当前奶牛引种存在的问题及对策措施

近年来,省委、省政府在加快全省农村经济发展和推进社会主义新农村建设中,将畜牧业作为重要支柱产业之一加大扶持,有力促进了奶牛业的发展,全省奶牛良种覆盖率大幅度提高,奶牛群体质量得到明显改善。但随着社会经济的发展,种子资源的市场化程度愈来愈高,全球的牲畜疫病也愈来愈复杂,奶牛的引种途径（即可供选择的国家范围）也逾加狭窄,如何有效、科学、安全、经济地引种成了奶牛养殖中的一大问题。现就当前奶牛引种中存在的问题和对策措施作一些粗浅的思考,供育种工作人员及广大奶牛养殖户参考。     

硫酸溶液中聚天冬氨酸对铜的缓蚀作用

目的 对聚天冬氨酸(PASP)在0.5 mol/L硫酸中对铜的缓蚀性能进行了测试.方法 采用电化学稳态极化法和交流阻抗法.结果 PASP同时抑制阴阳极过程,室温20℃时缓蚀效率随着聚天冬氨酸浓度的增加而增加,当PASP质量浓度达到8 g/L时缓蚀效率达到87.4%;PASP在铜表面的吸附作用符合修正过的Langmuir等温式形式.结论 PASP对铜具有一定的缓蚀保护能力.