高美施对平菇母种生长发育的影响

本试验是在ＰＤＡ培养丛中，添加不同浓度的高美施微肥，通过两个供试菌株的对比试验，选出了适宜各菌抹的最佳高美施生长浓度，结果，不同苗株在不同浓反的高美施培养基中的在现不一致。因此．在制种工作中，要根据平菇不同品种的特征特性来确定其最佳生长的营养条件。高美施在平菇母种制种技术上的应用在国内属首次报道。     

十个侧耳菌株的模糊综合评价初报

应用模糊数学中隶属度和模糊概率概念,对10个侧耳菌株进行了模糊综合评价。结果表明,SN1是表现最好的菌株,与实际试验结果较为一致。     

泰山粗毛型长毛兔高产品系选育研究

以德系、法系安哥拉、沪２０７１ 系和ＧＳＡＢ兔为育种素材,通过合成杂交方式建立选育基础群,实施半开放式核心群世代选育,经过５ 个世代育成粗毛型兔新品系。新品系平均年产毛量１７０４ｇ,兔毛品质优良,粗毛率２０．１１％ ,料毛比４０．３３∶１,成年体重５．５ｋｇ,体长５５ｃｍ ,胸围４０ｃｍ ,平均窝产仔７．３６只,育成成活率９２％ 。适应性和抗病力较强,体质健壮,外貌整齐,遗传性稳定     

全株饲用大麦品系筛选及赤霉素对其产量的影响

大麦（Hordeum vulgare L.）是耐盐、耐寒的优良作物,筛选全株饲用大麦品种（系）进行青刈利用有助于提高盐碱土地利用率、增加春季青绿饲草供应。本研究选用27个常规大麦品系,测定株高、茎粗和叶茎比等农艺性状,并于抽穗期刈割,分别测定产量、可溶性碳水化合物（WSC）、粗蛋白（CP）、中性洗涤纤维（NDF）和干物质体外消化率（IVDMD）等饲用品质性状,进行农艺性状与产量、饲用品质性状相关分析,筛选产量高、饲用品质优良的大麦品系;利用6个不同类型品系进行外源赤霉素（GA）的喷施试验,研究GA对全株饲用大麦产量的影响。结果表明：R150,R153,R287,R143,R295适宜整株青饲;分蘖数、茎粗和株高可作为辅助选择适宜整株青饲大麦品系（种）的依据。苗期喷施GA对不同类型大麦品系产量的影响不同,R154、R159、R171的产量显著增加（P<0.05）,R195产量增加不显著,R134产量降低。对于R169来说,仅60 g·hm^-2喷施浓度的处理高于对照。因此应结合大麦品种特点选择适宜的GA喷施时间和浓度。     

In Vitro Assessment of the Equine Hoof Wall Strains in Flat Weight Bearing and After Heel Elevation

Horseshoeing is a common practice, but effects on the hoof wall are poorly understood. Strain gauges were used to document and compare hoof behavior in vitro during flat weight bearing and after artificial heel elevation. Ten front limbs of Thoroughbred race horses, shod with conventional flat shoes, were used. Eight strain gauges were symmetrically distributed around the toe, quarters, and heels. Each limb was mounted to a testing machine (Kratos K5002; Kratos Dynamômetros, Ltda., Cotia-SP-Brazil) and subjected to a load equivalent to 30% of the donor's body weight. Strains (μ) were acquired by means of a computerized system and the results compared using Friedman and Wilcoxon statistical tests. There was greater strain variation when the heels were elevated. Compression predominated during flat weight bearing, with a tendency to horizontal traction after heel elevation. The changes in strain caused by heel elevation were not always symmetrical. Elevation of the heels tensed the toe and the medial quarter horizontally, increased load at the posterior portion of the hoof capsule, and hindered its expansion.     

THE STUDY OF STRAIN FATIGUE CRACK PROPAGATION BEHAVOURS OF VANADIUM BEARING HSLA STEEL

In this paper, the strain fatigue: crack propagation rates of vanadium bearing HSLA steel with different micro-structures are measured under constant load conditions, and the relationship between the crack propagation rate and the microstructures of steel is also studied.     

湖南省自育烤烟品系区域试验丰产性及稳定性分析

以湖南省10份自育烤烟品系为材料进行区域试验,并对试验结果进行丰产性及稳定性分析。结果表明,在湖南省4个烟区,品系V10（0522）产值最高,达到了42918.57元/hm2,品系（种）与地点互作方差和变异度值最小,且回归系数小于1,高产的同时稳定性也好,适应性强;品系 V8（CZ-24）的产值和稳定性均高于对照 V11（K326）,有推广利用的价值;品系V2（C72-6-2）、V7（0511）的产值均高于对照V11（K326）,其产值分别为39941.37元/hm2、37536.23元/hm2,但其稳定性表现均不理想;其余品系丰产性及稳定性均不如对照V11（K326）。     

红壤溶磷菌的筛选及溶磷机制

采用以磷酸铝为磷源的蒙金娜(PVK)液体培养基研究了从红壤土中筛选出的4种溶磷菌的溶磷效果,选出其中的优势菌株B1,并对其溶磷机理做出初步探讨。结果表明,所筛选出的4株溶磷菌在液体培养条件下均有显著的溶磷效果,其中菌株B1在培养4 d后有效溶磷量最大,达到292.8 mg L-1。各处理培养液pH在培养期间均有显著下降,pH从7.0下降至3.2~4.7。高效液相色谱测定发现,各菌株培养液中有机酸的种类与含量随培养时间变化而不同,其中菌株B1主要分泌草酸和苹果酸,培养1 d后有机酸总量可达到5 mmol L-1;通过添加有机酸对磷酸铝活化的试验表明,分泌有机酸溶磷仅是菌株B1溶磷机制之一,可能还存在其他溶磷机制。菌株B1生长的适宜pH范围为5~9,最适培养温度为30℃,100 ml三角瓶的最适装液量为30~40 ml。经鉴定,菌株B1与苏云金芽孢杆菌有99.9%的相似性。     

甜菜夜蛾优良球孢白僵菌菌株的筛选

测定初筛获得的6个球孢白僵菌菌株的毒力、产孢量、萌发率、胞外蛋白酶活性及菌株生长速度等多个生物、生态学指标,从专业角度构建最优序列,经灰色分析和不同菌株毒力效价显著性比较,筛选出了两株具有较大生产潜力的优良菌株BD-B015和BD-B038,对甜菜夜蛾的校正死亡率分别为88.33%和86.70%,僵虫率分别为86.67%和85.27%。