马铃薯替代玉米对鸡营养物质代谢率的影响

将 40只 48周龄的蛋鸡随机分成 4组 ,分别饲喂用 5 %、10 %、2 0 %的马铃薯替代玉米的日粮。结果表明 ,饲喂 10 %马铃薯替代玉米的日粮 ,其代谢能和钙表观利用率与其他组差异不显著 (P >0 0 5 ) ,蛋白质和磷表观利用率都高于其它各组 (P <0 0 1)。     

三种草坪草净光合速率和蒸腾速率的日变化特点研究

研究了在晴天的条件下，假俭草、细叶结缕草和地毯草净光合速率和蒸腾整编的日变化特点。结果表明：（1）假俭草和细叶绍缕草的净光合速率的日变化曲线均为双峰型，而地毯草为三峰型，3种草出现峰值的时间不同，均有明显的“午睡”现象，日平均净光全速率的大小顺序为俭草＞地毯草＞细叶结缕草；（2）假俭草和细叶结缕草的蒸腾速率的日变化曲线均为双峰型,而地毯草为单峰型，3种草出现峰值的时间有所判差别，“午睡”现象均不明显，日平均蒸腾速率的大小顺序为细叶绍缕草＞地毯草＞假俭草；（3）不同生态因子与3种草坪草净光合速率、蒸腾速率的相关程度均不相等。同种态因子与不同草坪草的净光合速率、蒸腾速率的相关程度也不一样。     

THE EFFECT OF A COMBINATION OF MEDETOMIDINE-BUTORPHANOL AND MEDETOMIDINE, BUTORPHANOL, ATROPINE ON GLOMERULAR FILTRATION RATE IN DOGS

The effects of intramuscularly administered medetomidine and butorphanol (MB), and medetomidine, butorphanol, atropine (MBA) on glomerular filtration rate (GFR) were determined in six dogs as measured by 99m-Tc-labeled diethylenetriaminepentaacetic acid (99mTc-DTPA) nuclear scintigraphy. Direct systolic, diastolic, and mean arterial blood pressures and heart rate were measured at regular time intervals before, during, and after GFR calculations. The mean GFR measurement following MB was significantly greater (4.44 ml/min/kg) than following MBA (3.82 ml/min/kg) or saline treatment (3.41 ml/min/kg). There was no significant difference between the mean GFR measurements following MBA injection and following saline injection. Diastolic and mean arterial pressures following MBA injection were significantly higher than the values recorded after either MB or saline alone. Heart rate following MB administration was significantly lower than that recorded for dogs receiving MBA or saline alone. The results of this study indicate that the administration of medetomidine in combination with butorphanol significantly increases total GFR in healthy dogs, while the administration of the combination of medetomidine, butorphanol, and atropine does not.     

干水(DRIWATER)应用可行性研究

经试验证明 ,应用干水植树技术 ,植株成活率为 71 .5%～ 90 %,在干旱、半干旱地区应用此技术是一种提高树木成活率的好途径     

丰本生力酵素饲喂肉猪试验研究

选用60日龄杜洛克、长白仔猪，Ⅰ组为试验组，Ⅱ组为对照组。对照组饲养基础日粮，试验组在对照组的基础上添加1％的丰本生力酵素。结果表明：平均日增重试验组均高于对照组，其增长幅度杜洛克为13．1％，长白猪为8．12％。饲料转化率差异不显著，但瘦肉率试验组比对照组提高了13．1％。经济效益明显提高，杜洛克试验组比对照组提高了4．8％，长白猪试验组比对照组提高了5．3％。     

恩肥对平菇菌丝生长,产量及品质的影响

本文报道了恩肥的施用浓度、施用时期对平菇菌丝生长、产量和品质的影响。试验结果表明,施用恩肥可促进平菇菌丝生长和子实体发育,有利于提高产量及改善品质。用肥量为每1000ml PDA或每公斤干培养料0.2～0.3ml时,菌丝生长速度显著加快,长满袋的时间可缩短4～5d,子实体产量可提高45.7％～55.9％,蛋白质、必需氨基酸和非必需氨基酸分别增加25.8％、14.94％和11.32％。在不同施肥时期中,又以现蕾期喷施效果最佳。     

波尔山羊胚胎数量、质量与受体移植妊娠率的关系

本文就波尔山羊胚胎数量，质量与受体移植妊娠率的关系进行了探讨。结果表明：胚胎质量优劣是直接影响胚胎移植成功率的关键因素。移植胚胎数量因品种不同有差异。移植双胚，奶山羊受体胚胎成羔率53．4％，明显高于成都麻羊胚胎成羔率36．3％，成都麻羊单胚成羔率为66．7％。     

百脉根种子硬实处理与耐藏性的探讨

地百脉根种子硬实用不同方法处理和对不同贮藏时间种子耐藏性的测定结果表明：贮藏１年种子含硬实率５９．３％。经擦破种皮或硫酸浸种处理，硬实率明显下降，发芽势，发芽率显著提高；种子随贮藏期的增长，硬实率明显下降，其发芽势，发芽率，活力指数以及直播出苗率，幼细苗存活率等亦随贮藏时间的延长而下降；种子电导值则随贮藏时间的延长而增大。     

Effects of predator-induced visual and olfactory cues on 0+ perch (Perca fluviatilis L.) foraging behaviour

Abstract –  Foraging juvenile fish with relatively high food demands are usually vulnerable to various aquatic and avian predators. To compromise between foraging and antipredator activity, they need exact and reliable information about current predation risk. Among direct predator-induced cues, visual and olfactory signals are considered to be most important. Food intake rates and prey-size selectivity of laboratory-reared, naive young-of-the-year (YOY) perch, Perca fluviatilis , were studied in experiments with Daphnia magna of two size classes: 2.8 and 1.3 mm as prey and northern pike, Esox lucius , as predator. Neither total intake rate nor prey-size selectivity was modified by predator kairomones alone (water from an aquarium with a pike was pumped into the test aquaria) under daylight conditions. Visual presentation of pike reduced total food intake by perch. This effect was significantly more pronounced (synergistic) when visual and olfactory cues were presented simultaneously to foraging perch. Moreover, the combination of cues caused a significant shift in prey-size selection, expressed as a reduced proportion of large prey in the diet. Our observations demonstrate that predator-induced olfactory cues alone are less important modifiers of the feeding behaviour of naive YOY perch than visual cues under daylight conditions. However, pike odour acts as a modulatory stimulus enhancing the effects of visual cues, which trigger an innate response in perch.     

鸡源株与人源株H9N2流感病毒血凝素受体结合位点氨基酸比较与分析

H19N2病毒可以感染多种禽类和哺乳动物，包括人类。流感病毒血凝素受体结合位点的氨基酸可以影响受体结合特性。为了解鸡源株与人源株H19N2病毒受体结合部氨基酸的差异，作者对二者进行了比较与分析，结果表明，鸡源株与人源株血凝素受体结合部位氨基酸的第137、183、190、226位点存在差异，鸡源株在这些位点分别为K、N、AorVorT、LorQ而人源株则分别为R、H、E、L。虽然尚不清楚这些位点的改变对病毒与细胞亲和力及宿主范围的影响，但由于H9N2在我国养鸡业的普遍存在，加强H9N2病毒的分子流行病学监测有重要意义。