农机维修节能减排技术推广探讨   总被引：3，自引：0，他引：3  

畅雄勃 《农机化研究》2015,(11):6-11

为了选择、推广适于当前现状的农机维修节能减排技术,采用调查研究、数理统计分析方法,阐述了喷油泵标准油量传递技术、喷油泵和喷油器调试技术推广的必要性和可行性,并提出了推广建议。在农机维修节能减排技术中,喷油泵标准油量传递技术、喷油泵和喷油器调试技术最具有推广价值和推广意义,建议采取国家扶持建设标准油量传递网络、对喷油泵和喷油器调试实施补贴,以及先试点后推广的方法进行推广。  相似文献   

北川白山羊基因组与表型性状相关的多态性RAPD标记     

蔡欣  苟兴能  董绍森  刘畅  王雪  李勇 《中国兽医学报》2011,31(10)

北川白山羊是在特定生态条件下未经系统繁育而形成的优良地方山羊品种,在生长发育、繁殖和抗逆等性状方面具有突出优势。通过对122只北川白山羊个体基因组的扩增,结果从80条RAPD引物中选出12条多态引物,北川白山羊群体平均遗传相似率和遗传多样性指数分别为0.859 8±0.077 6和0.919 8,表明北川白山羊品种具有一定的遗传分化和较丰富的遗传多样性。在12条多态性引物中,SBS06同时对体质量（P=0.028）、体高（P=0.017）和体长（P=0.037）具有显著影响,SBS02对体质量（P=0.033）和体高（P=0.034）具有显著效应,所以推断影响体质量和体高性状的QTL基因座可能与RAPD标记SBS06和SBS02相连锁,可以应用于北川白山羊体质量和体高性状的标记辅助选择以及相应主效基因的进一步研究。  相似文献   

论蔬菜农药残留中“人”的作用     

李湘梅  李玲利  钟青 《安徽农业科学》2015,(16)

着重从生产者的角度出发,综述了我国农药使用及蔬菜农药残留状况,总结了农药残留的规律;探讨了生产者在农药残留中的重要作用和现象发生的原因;从人的根本上提出了解决问题的方法。  相似文献   

土耳其斯坦裂体吸虫23kDa蛋白基因的序列分析及抗原表位预测     

宿文文  张莹  那璐  王文涛  常巧呈  张艳  王春仁 《黑龙江八一农垦大学学报》2014,26(4):26-29

为研究土耳其斯坦裂体吸虫23 kDa蛋白的生物学特性,以土耳其斯坦裂体吸虫cDNA为模版,利用PCR对23 kDa基因进行扩增,并将其克隆到T-easy载体后进行序列测定。利用生物信息学对其结构、抗原指数进行分析,并对其抗原表位进行预测。序列分析结果表明,该虫体的23 kDa基因长度为657 bp,A+T含量为57.38%,与曼氏血吸虫、埃及血吸虫和日本血吸虫的23 kDa基因的相似性分别为85.24%、83.71%和81.89%。蛋白二级结构分析表明,23 kDa蛋白经过4次跨膜,主要由6个α-螺旋、3个β-折叠、7个β转角和若干个无规则卷曲构成。抗原表位预测结果表明,该蛋白有3个B细胞抗原表位。综合分析土耳其斯坦裂体吸虫23 kDa蛋白是一种较好的抗原分子,是土耳其斯坦裂体吸虫疫苗的重要候选分子。  相似文献   

作物中4-香豆酸辅酶A连接酶的遗传进化分析     

李珊珊  张微  孙莉莉  胡宝忠  常缨 《作物杂志》2015,(2):43-48

4-香豆酸辅酶A连接酶(4CL)是苯丙烷类代谢途径的关键酶。2014年着重以水稻、大豆、玉米为研究对象,通过收集4CL基因完整的c DNA和编码氨基酸序列的数据,利用Mobyle、EMB0SS、DNAMAN以及MEGA5.0和Clustalx 1.83等生物信息学软件对数据进行分析比较,从而对4 CL基因的遗传进化及密码子使用进行分析总结。本研究构建了4CL的系统发生树,研究基因的密码子偏好性,比对分析酶的保守区,为进一步研究4-香豆酸辅酶A连接酶在农作物中的应用提供理论支持,为研究其次级代谢产物木质素及黄酮类物质的合成、积累和调控奠定基础。  相似文献   

不同稻作方式下武运粳30号的高产栽培技术   总被引：1，自引：0，他引：1  

徐洁芬  徐晓杰  朱邦辉  张庆  徐玉峰 《中国稻米》2015,(2):74-76

武运粳30号是江苏(武进)水稻研究所育成的一个早熟晚粳新品种,该品种具有高产、优质、抗病、抗倒性强等优点。本文介绍了武运粳30号的特征特性,并详细阐述了该品种在两种不同稻作方式下的栽培技术措施,望对农户生产有所帮助。  相似文献   

浅谈猪精液保存在人工授精中的发展与展望     

王利娟  常枨 《猪业科学》2020,37(6):102-104

在世界上主要的猪肉生产国中,猪人工授精(AI)技术的应用率在90%以上。尽管猪冷冻精液技术在不断进步,但由于其效率不高,在猪场实际生产中并不多见使用。在猪人工授精技术中,液态精液是目前应用最广泛的精液,与传统的牛冷冻精液不同,其独特的精子微胶囊保护膜技术,可以对猪精子进行更加完善的液态保存,因此液态精液是目前猪人工授精使用的主要方式。文章综述了猪精液保存技术在人工授精中的应用,并展望了今后的发展方向,为人工授精技术助力恢复生猪生产提供参考。  相似文献   

Association analysis for detecting significant single nucleotide polymorphisms for phosphorus-deficiency tolerance at the seedling stage in soybean [Glycine max (L) Merr.]     

Lihua Ning  Guizhen Kan  Wenkai Du  Shiwei Guo  Qing Wang  Guozheng Zhang  Hao Cheng  Deyue Yu 《Breeding Science》2016,66(2):191-203

Tolerance to low-phosphorus soil is a desirable trait in soybean cultivars. Previous quantitative trait locus (QTL) studies for phosphorus-deficiency tolerance were mainly derived from bi-parental segregating populations and few reports from natural population. The objective of this study was to detect QTLs that regulate phosphorus-deficiency tolerance in soybean using association mapping approach. Phosphorus-deficiency tolerance was evaluated according to five traits (plant shoot height, shoot dry weight, phosphorus concentration, phosphorus acquisition efficiency and use efficiency) comprising a conditional phenotype at the seedling stage. Association mapping of the conditional phenotype detected 19 SNPs including 13 SNPs that were significantly associated with the five traits across two years. A novel cluster of SNPs, including three SNPs that consistently showed significant effects over two years, that associated with more than one trait was detected on chromosome 3. All favorable alleles, which were determined based on the mean of conditional phenotypic values of each trait over the two years, could be pyramided into one cultivar through parental cross combination. The best three cross combinations were predicted with the aim of simultaneously improving phosphorus acquisition efficiency and use efficiency. These results will provide a thorough understanding of the genetic basis of phosphorus deficiency tolerance in soybean.  相似文献   

Vitamin C requirement of adult genetically improved farmed tilapia,Oreochromis niloticus     

Fan Wu  Feng Huang  Hua Wen  Ming Jiang  Wei Liu  Juan Tian  Chang Geng Yang 《Aquaculture International》2015,23(5):1203-1215

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Effects of Dietary Supplementation of Barodon on Growth Performance,Innate Immunity and Disease Resistance of Juvenile Olive Flounder,Paralichthys olivaceus,Against Streptococcus iniae     

Chang‐Hoon Shin  Hien Thi Dieu Bui  Samad Rahimnejad  Ji‐Hoon Cha  Byung‐Woo Yoo  Bo‐Kyeun Lee  Hyung‐Jin Ahn  Soo‐Il Choi  Yun‐Jeong Choi  Yong‐Ho Park  Jeong‐Dae Kim  Kyeong‐Jun Lee 《Journal of the World Aquaculture Society》2014,45(3):258-268

This study was conducted to evaluate the effects of dietary supplementation of Barodon, an anionic alkali mineral complex, on growth, feed utilization, humoral innate immunity and disease resistance of olive flounder. A basal experimental diet was used as a control and supplemented with 0.1, 0.2, 0.3, 0.4, or 0.5% Barodon. Triplicate groups of fish (26.4 ± 0.2 g) were fed one of the diets to apparent satiation twice daily for 10 wk. The growth performance was enhanced (P < 0.05) linearly and quadratically in fish fed diets containing Barodon compared with that in fish fed the control. Feed utilization was significantly improved by Barodon supplementation. Serum lysozyme and antiprotease activities were increased quadratically in Barodon fed groups. Also, significantly higher superoxide dismutase activity was found in Barodon‐fed fish. Dietary supplementation of 0.1–0.3% Barodon resulted in significant enhancement of fish disease resistance against Streptococcus iniae. The findings in this study indicate that dietary supplementation of Barodon can enhance growth, feed utilization, innate immunity, and disease resistance of olive flounder and that the optimum level seems to be 0.1% in diets.  相似文献