Effect of L-lysine Added in Diluent on the Fresh Semen Quality of Dorper Sheep     

MAO Ran  LI Qing-quan  SHI Yan  LAN Xiang-li  WANG Min  ZONG Ze-jun  XIA Guo-zhong  HAN Tian-long 《中国畜牧兽医》2015,42(12):3308-3314

In order to explore the effect of different L-lysine levels added in semen dilution on the fresh Dorper sheep quality stored at liquid state,3 health Dorper ram were used to collect semen which were equal-packaged and added to solution containing different levels (0,0.1,0.2,0.3,0.4 and 0.5 g) L-lysine in 120 mL diluent and at 0,6,24,30,48,54,72 and 78 h,the sperm motility,membrane integrity and acrosome integrity were detected.The results showed that the sperm motility in groups added 0,0.1 and 0.2 g L-lysine were higher than other groups,and that in 0.4 and 0.5 g L-lysine groups decreased faster than other groups;The sperm motility in 0.5 g L-lysine group reduced to 0 at 30 h,and it reduced to 0 at 48 h in the group added 0.4 g L-lysine;The effective survival time and survival index in the group added 0.1 g L-lysine was higher than other groups (P< 0.05);The membrane integrity of 0.1 g group was the highest,that had no significant difference with control group from 0 to 54 h (P >0.05),while after 72 h the two groups had significant differences (P< 0.05).The membrane integrity in 0.4 and 0.5 g groups were the worst,and that was significant different with other groups (P< 0.05);The acrosome integrity of 0.1 g group was the highest which had no significant difference with control group (P >0.05),0.4 and 0.5 g groups were the worst,the difference between them was not significant (P >0.05),while was extremely significant difference with other groups except for 0 and 6 h (P< 0.01).The results suggested that dilution added a high concentration of L-lysine could inhibit sperm quality,when the count of L-lysine was more than 0.2 g,sperm quality was significantly decreased,adding 0.1 g L-lysine could improve Dorper sheep fresh sperm quality stored at liquid state.  相似文献   

南方地区高水分玉米安全度夏技术探讨     

潘玉军  汪克宝  任洪元  牛明  顾惠敏  宋伟  杨国锋 《粮食储藏》2011,40(5):24-28

根据水分的高低,对新收购的高水分玉米分别储存在露天囤和高大平房仓中,将露天囤里的玉米通风降水后转入高大平房仓储存,再对玉米通风降温,并采取仓房密封、悬挂防晒网、空调控温等配套措施控制粮温,期间采取磷化铝多次补药熏蒸杀灭粮堆内害虫及霉菌,使玉米安全度夏。  相似文献   

低温与氮耦合对水稻内源激素含量的影响     

余小芬  邱学礼  张素华 《西北农林科技大学学报(自然科学版)》2020,48(9):73-80

【目的】探究不同耐冷氮高效水稻材料内源激素代谢特点,以阐明氮营养对提高水稻耐冷性的调节机理。【方法】以水稻近等基因系耐冷氮高效I16和冷敏氮低效I67为材料,采用水培试验,研究人工气候室模拟低温胁迫与4个氮肥水平(10,20,40和60 mg/L)耦合对水稻根、叶中内源激素吲哚乙酸(IAA)、细胞分裂素(CTK)、赤霉素(GA)、脱落酸(ABA)含量的影响及其互作效应。【结果】随水稻生育进程,根和叶中IAA、CTK、GA含量呈先升高后降低的趋势,在开花期达到峰值,ABA含量在成熟期达峰值。水稻根和叶中IAA、CTK、GA含量随施氮水平增加而升高,ABA则相反;在相同施氮水平下,低温抑制IAA、CTK、GA合成,促进ABA升高,4种激素含量呈现I16高于I67,叶高于根。低温与中氮耦合对水稻根和叶中IAA、CTK、GA的调控为正效应,低温与高氮耦合调控ABA为负效应,中氮可使水稻维持较高内源激素含量,这是增强水稻耐冷性的内在机理之一。【结论】在低温和氮肥耦合下,维持根叶中较高的IAA、CTK、GA、ABA含量,以及施氮对根、叶激素耦合效应的差异,是引起水稻耐冷性和氮素利用效率差异的重要生理调节因素。  相似文献   

振捣提浆与侧深施肥技术模式对寒地水稻产量性状及肥水效率的影响     

怀宝东  隋文志  李佩然  王安东  路宪春  孙兴荣 《中国农学通报》2020,36(26):69-76

为解决北方寒地传统搅浆平地耕作模式造成稻田泡田灌溉水量大和肥料利用效率低等问题,于2018—2019年以稻田水整地环节振捣提浆机与侧深施肥机为材料,采用2种耕整地模式和2种施肥模式的正交试验设计：搅浆平地耕整地模式(WPF)、振捣提浆耕整地模式(VEP)、基肥撒施模式(CFA)和侧深施肥模式(SDF),分析振捣提浆+侧深施肥技术模式对泡田期灌水量、干物质积累量、产量指标、肥料利用率及经济效益的影响。结果表明：与常规搅浆平地耕整地+基肥撒施(WPF+CFA)相比,搅浆平地耕整地+侧深施肥(WPF+SDF)、振捣提浆耕整地+基肥撒施(VEP+CFA)和振捣提浆耕整地+侧深施肥(VEP+SDF)3种技术模式对水稻泡田灌溉量、产量性状、肥料利用效率和经济效益均产生显著的影响,以VEP+SDF增幅最大,WPF+SDF次之,VEP+CFA最小。与WPF+CFA相比,VEP+SDF模式能显著提高肥水效率,节约泡田灌溉水11.4%,减少肥料施用量10%,产量和经济效益分别提高7.3%和1628.7元/hm²。本研究表明,VEP+SDF模式显著改善肥水利用效率,提高植株产量和经济效益,是北方寒地水稻较为理想的机械化整地施肥技术模式。  相似文献   

Glycine max and Glycine soja are capable of cold acclimation          下载免费PDF全文

J. Robison  N. Arora  Y. Yamasaki  M. Saito  J. Boone  B. Blacklock  S. Randall 《Journal of Agronomy and Crop Science》2017,203(6):553-561

Soybean has been considered a cold intolerant species; based largely upon seed germination and soil emergent evaluations. This study reports a distinct acquisition of cold tolerance, in seedlings, following short acclimation periods. Diversity in cold responses was assessed in eight cultivars of Glycine max and six accessions of G. soja. All varieties of soybean significantly increased in freezing tolerance following acclimation. This study indicates soybean seedlings are indeed capable of sensing cold and acquiring cold tolerance. Germination rates after cold imbibition were negatively correlated with maturity group, but positively correlated with cold acclimation potential in G. soja. Seed fatty acid composition was varied between the species, with Glycine soja accessions containing about 2‐times more linolenic acid (18:3) than G. max. Furthermore, high levels of linoleic acid (18:2) in seeds were positively correlated with germination rates following cold imbibition in G. soja only. We suggest that domestication has not impacted the overall ability of soybean to cold acclimate at the seedling stage and that there is little variation within the domesticated species for ability to cold acclimate. Thus, this brief comparative study reduces the enthusiasm for the “wild” species as an additional source of genetic diversity for cold tolerance.  相似文献   

不同运输方式对生菜采后生理的影响     

常希光  陈湘宁  许丽  周婧 《中国农学通报》2017,33(2):150-154

为研究运输方式对生菜采后生理及保鲜效果的影响,以‘橡生2号’生菜为研究对象,选择3种常见的运输方式:保温箱包装常温运输(A)、保温箱加制冷剂包装在常温下运输(B)、PE包装袋加纸箱包装在0℃下运输(C)进行试验。结果表明,采用C方式在0℃冷藏条件下运输的生菜,其失重率和呼吸强度均低于另外2组,VC含量和感官评价高于另外2组。因此在运输时间在12 h内可以采用A方式运输,在24 h内可以采用B方式运输,如超过24 h则最好使用C方式运输来保证生菜的货架期及品质。  相似文献   

2016年1月22－26日影响海南岛一次强寒冷天气过程分析     

罗婷  薛羽君  何忠桂  卢裕钧 《中国农学通报》2017,33(30):122-129

为了深入了解强冷空气影响下海南岛的天气变化特征，进一步提高对强冷空气影响过程预报准确率，利用海南省区域自动站资料、常规天气观测资料以及NCEP/NCAR 2.5°×2.5°一日四次再分析资料，采用天气学原理和动力学诊断分析方法，对2016年1月22—26日影响海南岛一次强冷天气过程进行分析和总结。结果表明，此次强冷天气过程是由于极地涡旋分裂南下，同时乌拉尔山高压脊强烈发展使冷空气在横槽聚集，横槽前部等高线阶梯形势明显，并伴有明显负变高和冷平流，从而有利横槽转竖南压引导强冷空气向南爆发。强冷平流是造成海南岛出现强烈降温的主要原因；另外，由于低纬地区短波槽活跃，短波槽前暖湿气流与南下冷空气共同作用造成降水。  相似文献   

甘蓝型油菜对华北坝上冷凉环境的适应性     

刘晓亚  张立峰  张继宗  石文宾  张培月 《作物杂志》2019,35(5):97-58

针对华北坝上冷凉区短季类经济作物缺乏,芥菜型油菜品质差、产量低等问题,于2017-2018年在农业农村部张北农业资源与生态环境重点野外观测试验站,引种了甘蓝型双低油菜品种华油杂62,以当地传统芥菜型油菜品种大黄为对照,监测了两品种的叶面积指数、角果净光合速率日变化、地上部干物质积累量、养分积累量和油菜农艺性状、产量等。结果表明,华油杂62较大黄生育期长约10d,平均叶面积指数高23.36%~36.73%;角果净光合速率不及大黄,N、P、K积累量高于大黄;干物质快速增长期延长21d,干物质积累潜值高46.86%;菜子产量较大黄高22.8%~54.0%。甘蓝型油菜华油杂62对华北坝上冷凉区的地理气候环境有较好的生态适应性,具有替代区域传统芥菜型油菜的优势。  相似文献   

无瓣海桑种子特征及不同贮藏环境下萌发特性的研究     

覃盈盈 《种子》2016,(9):51-54

种子的萌发除了与自身的生理结构、萌发时外界条件有关外,不同的贮藏条件和时间处理对种子萌发也有影响.本实验以无瓣海桑种子为研究对象,通过无瓣海桑种子的基本特征及不同贮藏环境(常温、常温干燥、-4℃、-70℃分别对应Ⅰ、Ⅱ、Ⅲ、Ⅳ)和时间(15,30,45,60,90 d)下其种子萌发特性的分析发现:径级对无瓣海桑的果重和种子的粒数均有显著影响;低温处理可显著缩短种子的萌发时间,同时有助于保持无瓣海桑的种子活性;无瓣海桑种子的活力会随着贮藏时间的增加而下降,因此不适宜长期贮藏,但短期贮藏时低温干燥贮藏可较好地保持其种子活力.  相似文献   

菜籽油实罐储存品质变化规律研究     

周天智  王东  吴秋蓉  许建华  邱艳  陈冉  李婕妤  刘爱兰  孙朝军  陈军 《粮食储藏》2017,(2):40-47

通过对2010~2014年大、中、小不同罐容实罐储存的四级菜籽油,采取定点、定罐、定层、定期跟踪观察油罐"三温"变化并取样检测,发现罐温、油温均随着气温的变化而变化,其中罐温最高,油温从上至下依次降低。菜籽油的水分及挥发物、色泽、气味、滋味、加热试验(280℃)等指标在储藏期间变化均较平稳,酸值和过氧化值均呈不断上升趋势,且不同年限的菜籽油其过氧化值上升幅度明显高于酸值。油罐容量越大,满罐存储时其存油品质的稳定性越好。罐内上、中、下层酸值变化差异不明显,上层和底层的过氧化值明显高于中层。严格控制好入罐油品质量,菜籽油储藏4~5年后酸值、过氧化值等质量指标仍可保持在国家限量标准以内。  相似文献