不同播期对威芋5号产量及生长发育的影响

以马铃薯威芋5号为试验材料,研究在威宁县不同播期对威芋5号生理指标和产量的影响。试验结果表明,3月23日播种,威芋5号产量最高,可达2 116.46 kg/667 m2,纯收入为1 134.81元/667 m2,经济效益显著,而不同播期对威芋5号生育期影响不大。     

肝色牛排菌生物学特性研究

ＺＭＥ１３０１号肝色牛排菌是在浙南山区新发现的野生资源菌，本文从形态特征及温度、水分、ｐＨ、光照等因子与菌丝生长和子实体形成发育的关系方面进行了研究，结果表明、菌丝生长的最适温度为２５℃，最适ｐＨ为４．０￣４．５，光是子实体在朱基形成，分化发育不可缺少的条件之一，这为肝色牛排菌的人工培养，开发利用提供了科学依据。     

番茄耐弱光性遗传规律的研究

在番茄个体发育过程中，对耐弱光自交系01—21(P1)和不耐弱光自交系01-61(P2)以及它们的正、反交和回交后代F1、F11、F2、B1、B2共7个群体进行遮光处理，分析其番茄耐弱光性遗传规律。结果表明：番茄耐弱光性以显性遗传和基因互作效应为主，存在部分加性遗传效应。     

铅、镉和铬在叶类蔬菜中的累积及对其生长的影响

 研究结果表明: 重金属元素铅(Pb) 、镉(Cd) 、铬(Cr) 对几种叶类蔬菜生长和产量都有明显的影响, 且其影响因蔬菜种类、元素种类和浓度的不同而有很大差异, 叶用莴苣> 苋菜> 芥菜> 菜薹>蕹菜, Cr > Cd > Pb ; 不同蔬菜类型可食部位积累重金属元素的顺序为苋菜> 叶用莴苣> 菜薹> 蕹菜> 芥菜;各元素从营养液向蔬菜体内转移的迁移累积率顺序为Cd > Cr > Pb。随着各元素浓度的增大, 对蔬菜生长的影响和其可食部分的富集量随之加大。     

黄河中游多沙粗沙区近40年降水特征分析

本文采用黄河中游多沙粗沙区具有代表性的17个雨量站的近40年旬降水量资料,分析了其降水量变化的特点和分布规律。结果表明:多沙粗沙区降水量年内分布集中,季节差异大;区间降水分配不均匀,且可分为三种明显不同的类型。各区降水量近几年来都呈现出明显的减少趋势。     

施用污泥对黑麦草生育及其元素含量的影响

将兰州市七里河污水处理厂的生活污泥施用于多年生黑麦草,藉以探讨施用量对黑麦草生长及其元素含量的影响。结果表明,随着污泥施用量(0.5～8kg/m²)的增加,黑麦草盖度,密度,地上、地下生物量以及叶绿素含量显著增加。施用后黑麦草地上部组织中N、P、K、Mg、Fe、Zn和Cu的含量增加,Mn含量减少,Ca和重金属元素Hg、Ni、Pb、As含量与对照间差异不显著,没有对黑麦草造成重金属毒害。     

牛蒡上发生的根结线虫种类鉴定

2007～2009年,对我国牛蒡主产区的牛蒡及其根际土壤中的植物寄生线虫进行调查研究,发现根结线虫危害最为严重。根据根结线虫的形态学特征和分子生物学检测方法对其进行鉴定,结果表明,我国牛蒡主产区根结线虫种类为北方根结线虫(Meloidogyne hapla)。     

Infection, immunity and the neuroendocrine response

The Central Nervous (CNS) and Immune Systems (IS) are the two major adaptive systems which respond rapidly to numerous challenges that are able to compromise health. The defensive response strictly linking innate to acquired immunity, works continuously to limit pathogen invasion and damage. The efficiency of the innate response is crucial for survival and for an optimum priming of acquired immunity. During infection, the immune response is modulated by an integrated neuro-immune network which potentiates innate immunity, controls potential harmful effects and also addresses metabolic and nutritional modifications supporting immune function. In the last decade much knowledge has been gained on the molecular signals that orchestrate this integrated adaptive response, with focus on the systemic mediators which have a crucial role in driving and controlling an efficient protective response. These mediators are also able to signal alterations and control pathway dysfunctions which may be involved in the persistence and/or overexpression of inflammation that may lead to tissue damage and to a negative metabolic impact, causing retarded growth.This review aims to describe some important signalling pathways which drive bidirectional communication between the Immune and Nervous Systems during infection. Particular emphasis is placed on pro-inflammatory cytokines, immunomodulator hormones such as Glucocorticoids (GCs), Growth hormone (GH), Insulin-like Growth Factor-1 (IGF-1), and Leptin, as well as nutritional factors such as Zinc (Zn).Finally, the review includes up-to-date information on this neuroimmune cross-talk in domestic animals. Data in domestic animal species are still limited, but there are several exciting areas of research, like the potential interaction pathways between mediators (i.e. cytokine-HPA regulation, IL-6-GCS-Zn, cytokines-GH/IGF-1, IL-6-GH-Leptin and thymus activity) that are or could be promising topics of future research in veterinary medicine.     

不同基质配方对番茄幼苗生长的影响

研究了不同基质配比对番茄幼苗生长的影响,以期筛选出理想的番茄育苗基质配方。试验结果表明,T3处理（草炭∶稻草=3∶5）和 T7处理（菇渣∶稻草=2∶1）的番茄株高、茎粗、地上部鲜干质量、全株鲜干质量和根系活力极显著高于2个对照,并且 T3和 T7处理的番茄根系活力极显著高于其他处理;T7处理的壮苗指数显著高于2个对照,因此 T7处理对番茄育苗的效果最好,其次为 T3。     

胚胎期高温处理对家蚕生长发育及部分经济性状的影响

用 3 4℃、RH80 %的环境处理 2 0余个家蚕品种的己 + 2 期胚胎 ,结果表明 :高温处理对某些品种的幼虫经过、幼虫体重、全茧量、茧层量等有明显影响 ,对健康性、茧层率无明显影响 ,对丝质无实质影响 ;高温处理对家蚕生长发育和经济性状的影响纯种间存在差异 ,杂交种受影响比纯种小。因此认为 ,高温处理对家蚕生长发育、经济性状的影响不会成为伴性温敏基因和雄蚕品种利用的限制因素 ,部分不良影响可以通过常规育种手段加以解决