The Effect of Spraying Concentrated Biogas on Growth and Physiological Characteristics of Cotton Seedling

[Objective] The effect of concentrated biogas slurry on growth and physiological characteristics of cotton seedlings was studied in this experiment, and theoretical basis for the rational application of concentrated biogas slurry was provided. [Method] Potted cotton seedlings was sprayed by five different dosages of concentrated biogas slurry, the impact of different spraying quantity (163 mL·hm^－2, 326 mL·hm^－2, 489 mL·hm^－2, 668 mL·hm^－2, 815 mL·hm^－2) after spraying time (after spraying 2nd day, 4th day, 6th day) on cotton seedlings growth and physiological indexes were studied. [Results] The results showed that the suitable quantity of spraying of concentrated biogas slurry had promoting effect to the cotton growth and development, the excess concentrated biogas slurry could inhibit the growth of cotton seedlings. The plant height, dry weight per plant and leaf area of spraying 489 mL·hm^－2 processing are the highest, the average of two batches on the 6th day after spraying are 21.15%, 35.95%, 18.84% higher than CK, respectively. Spraying concentrated biogas slurry can improve cotton seedlings chlorophyll content, soluble sugar contents, soluble protein content. Spraying 489 mL·hm^－2 processing is the highest in both batches, the average of two batches is 18.84%, 24.03%, 3.16% higher than CK, respectively. The result of concentrated biogas slurry onseedlings leaves took effect quickly, especially in 0～4th days. [Conclusion] It is concluded that the suitable amount of concentrated biogas slurry has a positive effect on the growth and physiological characteristics of cotton seedlings, which is beneficial to the formation of strong seedlings of cotton and provides the basis for the later growth of cotton.     

羊同期发情腹腔镜输精最佳时间的研究

[目的]确定羊同期发情腹腔镜输精的最佳时间。[方法]选取繁殖机能正常、营养状况良好的适龄母羊,在试验母羊阴道内放置孕酮海绵栓10~14 d,撤栓时肌肉注射250~330 IU/只孕马血清促性腺激素（PMSG）。撤栓后12~24 h开始试情,早晚各1次。按撤栓后时间及发情时间不同分4组进行腹腔镜输精：1组为撤栓后46~50 h输精（n=138）,2组为撤栓后50~54 h输精（n=156）,3组为撤栓后54~58 h输精（n=275）,4组为羊发情后30~36 h输精（n=226）。输精后第40~45天进行B超检查,计算各组母羊受胎率。[结果]发情后30~36 h输精的母羊（4组）受胎率最高,为97.79%,其次为撤栓后50~54 h输精的母羊（2组）,受胎率为97.44%,撤栓后46~50 h输精的母羊（1组）受胎率为91.30%;撤栓后54~58 h输精的母羊（3组）受胎率最低,为89.82%。[结论]采用同期发情配合腹腔镜输精技术进行母羊人工授精,最佳输精时间为撤栓后50~54 h以及母羊发情后30~36 h。     

双峰驼自然发酵乳对小鼠抗氧化作用的影响

为探讨双峰驼自然发酵乳(酸驼乳)对机体抗氧化系统的影响,本试验以昆明种小白鼠为实验动物,测定了给予自然发酵驼乳小鼠的部分抗氧化指标.将试验小鼠随机分成3组,I组为空白对照组,按0.3ml/10g灌服生理盐水;Ⅱ组和Ⅲ组为酸驼乳低剂量组和酸驼乳高剂量组,分别按0.15ml/10g和0.3mi/10g剂量灌服酸驼乳.在末次灌服酸驼乳30min后,眼球采血并断颈处死,迅速取肝、脑和骨骼肌组织样品,并测定血清和肝、脑和骨骼肌的总超氧化物歧化酶(T-SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)活力,丙二醛(MDA)含量和总抗氧化能力(T-AOC)等.结果表明,酸驼乳能显著或极显著(P<0.05或p<0.01)降低小鼠血清、肝、脑组织MDA含量,而骨骼肌组织MDA含量有一定降低趋势,但尚未达到显著水平;能显著或极显著(P<0.05或P<0.01)提高血清、脑组织和骨骼肌组织T-SOD、CAT、GSH-Px和T-AOC活力,同时还能显著或极显著(P<0.05或p<0.01)提高肝组织CAT和GSH-Px活力,而对肝组织SOD和T-AOC活性无显著影响.因此,自然发酵驼乳对机体的抗氧化能力具有较强的增强作用.     

冷冻精液输精深度和时间对蒙古羊受胎率的影响

[目的] 研究冷冻精液输精深度和时间对蒙古羊受胎率的影响。[方法] 选取体况健康、繁殖机能正常的蒙古羊母羊作为试验动物,采用孕酮海绵栓对受体母羊进行同期发情处理。应用常规人工输精法（n=135）、过子宫颈输精法[过子宫颈第一皱褶（1~2 cm）输精（n=120）,过子宫颈第二到第三皱褶（3~4 cm）输精（n=120）]、腹腔镜辅助子宫内输精法（n=128）对发情后的母羊进行冷冻精液人工授精。接受常规人工输精法和过子宫颈输精法处理的受体母羊在发情后约14 h和22 h各输精1次,接受腹腔镜辅助子宫内输精法处理的受体母羊在发情后30~36 h输精1次。输精后40 d用B超仪检测母羊妊娠情况,计算并比较接受不同输精方法处理母羊的受胎率。[结果] 腹腔镜辅助子宫内输精法的受体母羊受胎率平均值最高,为60.2%;其次为过子宫颈第二到第三皱褶（3~4 cm）输精,受胎率平均值为58.3%;过子宫颈第一皱褶（1~2 cm）输精和常规输精法的受体母羊受胎率平均值分别为37.5%和36.3%。统计学分析表明,腹腔镜辅助子宫内输精法和过子宫颈第二到第三皱褶（3~4 cm）输精的受体母羊受胎率平均值显著（P<0.05）高于常规输精法和过子宫颈第一皱褶（1~2 cm）输精。[结论] 蒙古羊母羊发情后30~36 h采用腹腔镜辅助子宫内输精法完全穿刺子宫颈输精1次,可获得比常规输精法更高的受胎率;采用过子宫颈输精法在母羊发情后约14 h和22 h各输精1次,当授精深度接近4 cm时可达到与腹腔镜辅助子宫内输精法接近的受胎率。     

11种帚用高梁形态特征分析

1材料与方法 1．1试验区概况 试验在赤峰市畜牧兽医科学研究所试验基地进行。该基地位于赤峰市西郊10km处,118°51′E,42°17′N,海拔601m,属温带大陆性季风气候。年日照时数2907h,年均降水量361mm,年均无霜期145d,年平均气温7．2℃,≥10℃年积温3210℃。试验地土壤为栗钙土,有机质含量约1．95％,氮、磷、钾含量分别为0．086％、0．160％、2．100％,pH值为8．2,肥力均匀。喷灌,水源充足。     

35个紫花苜蓿品种在内蒙古赤峰地区的生产性能评价

在内蒙古赤峰地区对引进国内外的35个紫花苜蓿（Medicago sativa）品种进行田间试验,比较了生长第2年的越冬率及不同茬次的株高、鲜草产量、干草产量、叶茎比等各项农艺性状指标的差异,并通过灰色关联分析综合评价不同苜蓿品种的生产性能。结果表明,在种植第2年,综合评价最优的参试品种是龙牧806,其次是飞马、肇东、龙牧801、公农1号等,这些苜蓿品种均为适宜在赤峰地区推广种植的优良品种,而肇东苜蓿、龙牧系列、公农1号与敖汉苜蓿越冬率相对较高,生产性能在综合评价中表现良好,其全面的特点更适合在赤峰市气候偏冷的北部旗县地区推广应用。     

内蒙古中西部3种乡土植物根系抗拉力学特性的对比研究

[目的]研究内蒙古中西部地区3种乡土植物种根系的抗拉机理,为该区水土保持的树种选择提供依据。[方法]以内蒙古中西部地区3种常见植物柠条、沙棘和紫花苜蓿根系为对象,进行室内单根瞬时极限拉伸试验研究。[结果](1)3种植物单根极限抗拉力随着直径的增加而增大,单根极限抗拉强度随直径的增加均呈幂函数递减。(2)当直径在0.19mm~2.89mm范围内相同径级时,3种植物单根极限抗拉强度和弹性模量均值大小顺序相同,依次为:柠条沙棘紫花苜蓿,3种植物根径≤0.5mm的细根具有较大的极限抗拉强度和弹性模量;(3)同一树种当根系直径相同时,土壤含水率高则其单根平均极限抗拉强度小。[结论]根系的力学特性与形态结构特征的结合,是选择适宜的水土保持树种非常重要的因素。从根系抗拉性能方面评价3种植物根系固土抗蚀能力大小则柠条优于沙棘和紫花苜蓿。     

双峰驼自然发酵乳对小鼠抗应激能力的影响

为探讨双峰驼自然发酵乳对机体抗应激能力的影响,本试验以昆明种小白鼠为实验动物,采用经典抗应激试验方法和慢性热应激试验方法,研究了自然发酵驼乳对急性和慢性应激小鼠的影响.将试验小鼠随机分成空白对照组、自然发酵驼乳低剂量和高剂量组,给予不同剂量的自然发酵驼乳一定时间.观察双峰驼自然发酵乳对小鼠负重游泳时间、酎常压缺氧时间、耐高温时闻和酎低温时间的影响;定量检测对慢性热应激小鼠的日增重、饲料转化率、胸腺指数和脾脏指数以及血清葡萄糖、白蛋白和总蛋白含量、碱性磷酸酶(AKP)活力、肌酸激酶(CK)活力、乳酸脱氢酶(LDH)活力等的影响.结果表明,双峰驼自然发酵乳能显著延长小鼠负重游泳时间,耐缺氧、耐高温和耐低温存活时间(p<0.05);增加应激小鼠的日增重和饲料转化率,并提高脾脏指数(p<0.05);能极显著(p<0.01)增加血清葡萄糖含量和总蛋白含量;能极显著降低血清AKP和CK活力.因此,自然发酵驼乳对机体急性应激和慢性热应激均有显著的缓解作用.     

11种帚用高粱形态特征分析(英文)

[Objective] To provide a theoretical basis for high-yield breeding of broom sorghum. [Method] Using 11 kinds of broom sorghum collected at home as research objects, the differences in morphological characteristics of broom sorghum were compared through the survey of some indicators, such as plant height, tillering, inflorescence, stem node, stem-leaf ratio, yield, and so on. [Result] The 11 kinds of broom sorghum were different in morphological characteristics with large amplitude of plant height; zygl-1, zygl-6, zygl-8 and zygl-9 were appropriate for fixed broom type; zygl-9 had the highest integrated production. [Conclusion] The study laid the foundation for further exploring breeding, cultivation and promotion of broom sorghum.