腐殖酸液浸苗对匙叶翼首草产量和品质的影响   总被引：1，自引：0，他引：1  

杨敬军  何淑玲  常毓巍  马建华  撒玉宝 《北方园艺》2011,(8):187-190

基于腐殖酸液肥在烤烟、冬小麦等农作物及辣椒等蔬菜生产的良好表现,为了拓宽该肥料的使用范围,采用单因素随机区组设计,研究了腐殖酸液肥浸苗对匙叶翼首草产量和品质的影响。结果表明:匙叶翼首草用不同浓度的腐殖酸液肥浸苗后移栽可以显著提高其产量,且0.6%腐殖酸溶液浸苗处理产量最高,较对照增产25.06%,还可以显著提高匙叶翼首草中的糖含量,同时降低灰分含量。腐殖酸液浓度增大到0.8%时不但产量降低,而且匙叶翼首草的品质也降低了。  相似文献   

Evaluation of the side-effects and thermal antinociceptive effects of intravenous hydromorphone in cats     

K  Wegner  SA Robertson 《Veterinary anaesthesia and analgesia》2003,30(2):100-100

Hydromorphone (H) may be an effective analgesic agent in cats, but fear of negative behavioral side‐effects associated with opioids is cited as a reason for avoiding this class of analgesics in cats. This study was designed to assess onset and duration of antinociception using an established feline thermal threshold model in cats, given an accepted clinical dose of 0.1 mg kg^?1 of H. In addition, cats were observed for changes in behavior and other side‐effects. Six adult cats from an established colony (four spayed females and two castrated males, 4.7–7.0 kg) received 0.1 mg kg^?1 H IV following establishment of baseline thermal threshold (TT) values. TT was tested at 15 minutes post‐injection, then at every 30–60 minutes for 12 hours. Side‐effects and behavior changes were recorded for 12 hours. Changes in TT over time were analyzed using a one‐way anova ; a p‐value <0.05 was considered significant. TT increased from a pre‐treatment value of (mean ± SD) 40.9 ± 1.65 °C to instrument cutout (55.5 °C) within 30 minutes for 5/6 cats. Mean TT was significantly elevated above baseline from 15 to 450 minutes after treatment. There was a significant increase in skin temperature from 15 to 300 minutes with peak increase of 1.55 °C at 135 minutes. Side‐effects included mydriasis (6/6) and nausea (4/6), characterized by licking, foaming, and gagging. Mydriasis occurred within 10–30 seconds of injection and persisted for 5–7 hours. Nausea was noted within 2 minutes of injection and persisted for 30–90 minutes; no vomiting occurred. Commonly observed behavioral changes included ventral tail curl (6/6 cats, onset 5–45 minutes, duration 4–5 hours) and euphoria (5/6 cats, onset <6 minutes for 4/6, duration 1–6 hours). 2/6 cats were profoundly sedate. Three cats showed signs of dysphoria with or without increased motor activity with variable onset and duration. Dysphoric behavior included staring, pacing, vocalizing, and sudden movements. 3/6 cats exhibited both euphoria and dysphoria at different times during the study. At no time were cats difficult to restrain or work with. Return to baseline behavior occurred 7–8.5 hours post‐injection. Mydriasis did not correlate closely with antinociception. Signs of sedation and euphoria corresponded with onset of antinociception, but not duration. Tail curl signs correlated with antinociception. In this model, H proved to be a rapid acting, potent, analgesic with a long (7.5 hours) duration of action. The most common behavioral changes noted were ventral tail curl, euphoria, and sedation. Mydriasis and nausea were noted as side‐effects.  相似文献   

Sporodesmin toxicosis in an alpaca     

MA COULTON  AJ DART  SA McCLINTOCK  DR HODGSON 《Australian veterinary journal》1997,75(2):136-137

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The effect of lidocaine and ketamine on thermal thresholds in cats     

SA Robertson  PM Taylor  W Davies  MJ Dixon 《Veterinary anaesthesia and analgesia》2002,29(2):95-96

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Immunosuppressant Effect of Long Term and Subtherapeutic Chlortetracycline in Broiler     

TONG Jian-ming  ZHANG Ri-jun  SA Ren-na  PAN Shu-yuan  HUANG Yan 《中国农业科学(英文版)》2002,1(4):472-476

Experiments were conducted with 270 Abore Acre male broilers to study the influence of dietary chlortetracycline (CTC) on the bursal, thymus and spleen weight index and T, B cell proliferation and antibody responses of broilers. Results show that 50mg/kg CTC had no significant inhibitory effect on thymus and spleen weight index, and T, B cell proliferation of broilers at 21 days old. 150mg/kg CTC had significant inhibitory effect on bursal, thymus and spleen, and T, B cell proliferation (P＜0.05). Dietary CTC had a direct inhibitory effect on lymphocyte proliferation in vitro. 50mg/kg and 150mg/kg CTC had a significant inhibitory effect on the antibody responses to BSA (P＜0.01). Results demonstrated that subtherapeutic and long term CTC had significant inhibitory effects on immune organs and antibody response. The immunosuppressant effect became higher when the level of CTC increased. 150mg/kg CTC increased the growth rate of broilers significantly.  相似文献   

葡萄糖氧化酶和酵母硒混合添加剂对肉鸡生产性能和免疫指标的影响   总被引：1，自引：0，他引：1  

邢焕  孙春阳  栾素军  萨仁娜  张宏福  丁美芳 《动物营养学报》2015,(4)

本文旨在研究以葡萄糖氧化酶和酵母硒为主要成分的混合添加剂,在规模化养殖条件下,对肉鸡生产性能、免疫器官指数和血清蛋白指标的影响。将5 000只1日龄爱拔益加(AA)肉鸡,随机分为2个组,分别为对照组和试验组,每个组设4个重复,每个重复625只鸡。对照组饲喂玉米-豆粕基础饲粮,试验组饲喂基础饲粮+0.2%混合添加剂(葡萄糖氧化酶和酵母硒)。试验期为42 d。结果表明,1)生产性能:在肉鸡不同日龄阶段(1~21日龄、22~42日龄和1~42日龄),试验组的平均日采食量(ADFI)、平均日增重(ADG)均显著高于对照组(P0.05),ADFI分别提高了2.58%、1.55%和1.83%,ADG分别提高了1.67%、6.93%和6.66%;试验组料重比(F/G)显著低于对照组(P0.05),分别降低了3.36%、5.13%和4.44%。在肉鸡生长全期(1~42日龄),试验组肉鸡死亡率显著低于对照组(P0.05)。2)屠宰性能:21日龄试验组肉鸡屠宰率、全净膛率、半净膛率显著高于对照组(P0.05),分别提高2.35%、4.11%和3.23%,42日龄肉鸡屠宰指标在试验组与对照组之间无显著差异(P0.05)。3)免疫器官指数:21日龄时,试验组肉鸡法氏囊指数显著高于对照组(P0.05),脾脏指数和胸腺指数在2组之间无显著差异(P0.05);42日龄时,试验组肉鸡胸腺指数显著高于对照组(P0.05),脾脏指数和法氏囊指数略有提高(P0.05)。4)血清指标:21日龄时,试验组肉鸡血清总蛋白含量显著高于对照组(P0.05);42日龄时,试验组肉鸡血清球蛋白含量显著高于对照组(P0.05)。在肉鸡21、42日龄时,试验组血清尿素氮含量显著低于对照组(P0.05)。综上,肉鸡饲粮使用含葡萄糖氧化酶和酵母硒的混合添加剂,能够提高肉鸡生产性能,降低死亡率,提高免疫器官指数和降低血清尿素氮含量。  相似文献   

基于风云3B微波亮温数据的内蒙古草原牧区雪深反演研究     

萨楚拉  刘桂香  包玉龙  王牧兰 《中国草地学报》2015,(3):60-66

基于内蒙古草原牧区2011~2013年两个积雪季的国产卫星FY-3B双极化亮温数据,通过使用2012年MODIS的MCD12Q1土地覆盖类型产品数据提取内蒙古牧区草地植被类型,同时使用与FY-3B数据同期的MOD10A1日积雪覆盖产品剔除研究区内无积雪覆盖的像元,进而得到内蒙古草原牧区有积雪覆盖区域的FY-3B影像各像元的亮温数据。将亮温数据与研究区内相应的野外固定实验站观测数据及呼伦贝尔市的7个气象站点雪深观测数据建立回归拟合关系,初步建立了基于FY-3B亮温数据的适合于内蒙古草原牧区的雪深反演模型,模型参数拟合决定系数R2为0.59。使用2012年研究区雪深观测值检验模型,均方根误差为3.12cm,平均相对误差为18%,表明所建立的雪深反演模型能够较好地估算和识别内蒙古草原牧区雪深的空间分布特征。  相似文献   

Determination of reference intervals for metabolic profile of Hanwoo cows at early,middle and late gestation periods     

Da Chuan Piao  Tao Wang  Jae Sung Lee  Renato SA Vega  Sang Ki Kang  Yun Jaie Choi  Hong Gu Lee 《畜牧与生物技术杂志(英文版)》2015,(2):252-256

Background: Metabolic profile was initially designed as a presymptomatic diagnostic aid based on statistical analyses of blood metabolites to provide an early warning of certain types of metabolic disorder. However, there is little metabolic profile data available about Korean Hanwoo cows. Therefore, this study aimed to determine the reference intervals of metabolic profile for Korean Hanwoo cows.Methods: Healthy animals(2,205) were selected and divided into early(day 1 to 95), middle(day 96 to 190) and late(day 191 to 285) period according to their gestating period. Metabolic profile including total protein(TP), albumin(Alb), urea(UREA), glucose(Glu), total cholesterol(T-Cho), long-chain fatty acid(LCFA), aspartate aminotransferase(AST),gamma-glutamyl transpeptidase(GGT), creatinine(Crea), calcium(Ca), inorganic phosphorous(i P) and magnesium(Mg)were analyzed using a TBA-40 FR automatic biochemical analyzer. The data of Korean Hanwoo cows were then compared to those of the Japanese Wagyu cows.Results: Most of the data of the Korean Hanwoo cows were relatively higher than those of Japanese Wagyu cows, with the exception of Glu and GGT. This may indicate that the nutritional level of feed for the Korean Hanwoo cows was higher than that of the Japanese Wagyu cows because of the different feeding system. In particular, relatively higher levels of UREA and LCFA were observed in the Korean Hanwoo cows, and this may also contribute to the low reproduction efficiency.Conclusions: These findings may provide some theoretical basis for understanding the reproductive and feeding situation of Korean Hanwoo cows.  相似文献   

中国施用生物炭对番茄产量和品质效应的Meta分析     

郑健  撒青林  王燕 《农业工程学报》2023,39(22):63-73

为定量分析生物炭施用对番茄产量和品质的时空效应和影响机制,同时为番茄生产中生物炭合理施用量的确定提供依据。该研究通过检索文献整合已发表的相关田间试验数据,采用Meta-analysis法分析了生物炭施用条件下,生物炭特性、土壤条件、田间管理措施与时空特性对番茄产量和品质的综合效应,并对各影响因素进行通径分析。结果表明：施用生物炭显著增加了番茄产量、果实Vc、可溶性糖和可溶性固形物含量（P<0.05）,增长率分别为 30.7%（95%置信区间（confidence interval,CI） 为27.6%～33.9%）、13.8%（95% CI为10.8%～16.9%）、6.7%（95% CI为3.3%～10.2%）和10.7%（95% CI为5.8%～15.8%）,而番茄果实硝酸盐含量降低了3.1%（95% CI为-6.7%～0.8%）,对番茄果实糖酸比含量增加效应不显著（95% CI为-3.0%～7.9%）;番茄产量效应的亚组分析表明,生物炭施用在不同时间和区域特征下对番茄增产效应影响显著（P＜0.01）,随着时间的推移,生物炭施用对番茄增产效应呈波动式增长趋势,华北、东北农田区的番茄增产效应不显著;土壤有机质含量与番茄增产率呈正相关关系,土壤pH值与番茄增产率呈负相关关系,番茄增产率随土壤全氮及硝酸钾含量的增加呈先增后减趋势;田间管理措施对番茄产量效应分析结果表明,生物炭施加量>40～80 t/hm²时,增产率可达37.8%（95% CI为33.5%～42.1%）,生物炭热解温度在400～600 ℃内,生物炭pH值控制在>8～9为最优;生物炭施用量、生物炭pH值和产量年份是影响生物炭增产效果的3个主要因素。研究结果可为番茄生产中科学、合理生物炭施用量的确定提供理论支撑。  相似文献   

不同干扰下大兴安岭白桦次生林土壤理化性质特征     

萨如拉  呼日查  于晓雨  王子瑞 《林业资源管理》2022,(2):135-140

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