细香葱周年高效生产技术     

覃振略  覃振助  韦丹  周艳芳  覃振普 《中国蔬菜》2011,1(15):43-44

广西柳江县种植细香葱历史悠久，但在2004年以前，种植规模小，种植零散，经济效益不高。从2005年开始，随着种植结构的不断调整和优化，在当地政府的引导和当地经纪人、种植大户的带动下，细香葱栽培面积不断扩大，并且出现了三都镇里贡村、三都镇觉山村、三都镇龙兴村、进德镇沙子村等细香葱种植专业村和一大批种植专业户，  相似文献   

中国煤炭生产甲烷排放现状及对策研究     

徐东耀  刘伟  但海均  李晓凡  李光腾  竹涛 《绿色科技》2015,(6)

指出了煤炭行业的甲烷排放也是造成温室效应的重要因素之一,气候的变化直接影响到人类社会的可持续发展,我国有着丰富的煤层气储藏量,为发展新清洁能源奠定了坚实的基础,但是由于政策和技术限制,我国煤炭行业每年向大气中排放了大量的煤炭甲烷气体,尤其是低浓度煤炭甲烷,造成了资源浪费的同时也是煤炭生产安全的隐患.结合我国煤炭甲烷排放特征,分析了我国煤炭甲烷排放现状和主要的利用技术,并提出了中国煤炭甲烷排控的对策.  相似文献   

反向遗传技术在牛轮状病毒研究中的应用     

王丹  宋玲玲  王洪梅  杨宏军  武建明  高运东  仲跻峰  何洪彬 《安徽农业科学》2011,39(12):7255-7256

本文综述了牛轮状病毒的生物学特性、反向遗传学系统的建立及其研究进展,并对反向遗传技术应用于牛轮状病毒进行展望。  相似文献   

Preparation of Adjuvant Diluent for Live Vaccine against Classical Swine Fever and Evaluation of its Immune Effects     

LIANG Kong-xian  LV Xiao-jun  DING Dan  XU Qi  ZHOU Jie  LIU Wei 《中国畜牧兽医》2015,42(9):2467-2473

The aim of this study was to develop a novel oil-in-water (O/W) emulsion as adjuvant diluents (AD) for live vaccine against classical swine fever (CSF) that could effectively enhance the immune effect of vaccine.The AD was prepared by high-pressure homogenization technique.Formulations and preparation parameters were optimized with response surface design.Its stability, particle size, polydispersity (PDI) and Zeta potential were characterized.The humoral immune response and cellular immune response of the AD were evaluated with BALB/c mice by intramuscular injection.The particle size of the AD prepared by optimized formulation and parameters was 100.4 nm, PDI was 0.147, and Zeta potential was —28.7 mV.The experiment results showed that the AD had good stability.The AD was inoculated combined with live vaccine against CSF into BALB/c mice by intramuscular injection.The results showed that the live vaccine against CSF specific immune responses could be evoked in mice by co-inoculation with AD and vaccine.The cellular immune response levels in co-inoculated groups were significantly higher than control group (P<0.05), with obvious phenomena of higher levels of IFN-γ, IL-6 and IL-4 in serum.The result revealed that cellular immune capability significantly improved with the AD.The results strongly revealed that cellular immune capability significantly improved by introducing AD for effective immune-adjuvant for live vaccine against CSF.  相似文献   

TTC法快速测定白鲜种子生活力     

雷慧霞  于营  刘亚苓  张新静  邢丽伟  鲁海坤  吴健勇  郭靖 《种子》2020,(1):156-158

采用2,3,5-氯化三苯基四氮唑(TTC)染色法测定白鲜种子生活力,利用正交试验设计,研究不同的浸种温度、浸种时间、TTC溶液浓度、染色温度和染色时间对白鲜种子染色效果的影响。结果表明,TTC法能够快速测定白鲜种子的生活力,其染色最佳条件为30℃浸种6 h,35℃条件下0.3%TTC溶液避光染色24 h。  相似文献   

玉米醇溶蛋白水解物的Zn2+螯合能力及抗氧化活性分析     

李丹  朱蕊芳  张东杰 《黑龙江八一农垦大学学报》2020,32(1):46-52

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8个樱花品种播种育苗技术研究   总被引：1，自引：0，他引：1  

况红玲  聂超仁  徐海芹  张兵  徐建刚  朱英武  杜丹  喻峰  孟晨  袁鸿 《湖北林业科技》2020,49(1):25-26

本文介绍了8个樱花品种的种子从储藏、催芽、播种到苗期管理的试验全过程,总结出一种简便易操作的樱花播种育苗技术,可供生产设施比较简陋的地方借鉴和参考。  相似文献   

毛薯的营养成分分析和聚类分析     

黎丹  吴文嫱  黄东益  谢俊  赵景梅  黄小龙  许云 《热带作物学报》2018,39(3):575-580

为选育出优良的毛薯种质,本研究以海南大学薯蓣种质资源圃里的80份毛薯为材料,以河南焦作温县的垆土铁棍山药为对照,采用苯酚硫酸法、考马斯亮蓝法以及蒽酮比色法对其干物质、粗多糖、蛋白、可溶性糖和淀粉含量进行测定和比较分析。结果表明:毛薯的干物质含量介于18.62%~38.88%,粗多糖含量介于2.88%~15.82%、蛋白含量介于5.14%~10.71%、可溶性糖含量介于0.1%~13.84%、淀粉含量介于11.94%~64.28%。与对照山药相比,Ds96所测品质均优于对照,可优先选择推广。此外,毛薯各营养品质之间存在着一定的相关性,干物质与糖类存在显著负相关,与蛋白和淀粉表现为正相关。通过对80份毛薯的营养品质进行聚类分析,在欧式距离为3.17时,可将其分为八类,按类群来看,类群Ⅳ各营养价值适中,其他类群在某些营养上比较优秀,可根据需要进行优良资源选择。   相似文献   

The priority of management factors for reducing the yield gap of summer maize in the north of Huang-Huai-Hai region,China          下载免费PDF全文

Yue-e LIU  Yu-xin LI  Tian-fang LÜ  Jin-feng XING  Tian-jun XU  Wan-tao CAI  Yong ZHANG  Jiu-ran ZHAO  Rong-huan WANG 《农业科学学报》2021,20(2):450-459

Understanding yield potential, yield gap and the priority of management factors for reducing the yield gap in current intensive maize production is essential for meeting future food demand with the limited resources. In this study, we conducted field experiments using different planting modes, which were basic productivity(CK), farmer practice(FP), high yield and high efficiency(HH), and super high yield(SH), to estimate the yield gap. Different factorial experiments(fertilizer, planting density, hybrids, and irrigation) were also conducted to evaluate the priority of individual management factors for reducing the yield gap between the different planting modes. We found significant differences between the maize yields of different planting modes. The treatments of CK, FP, HH, and SH achieved 54.26, 58.76, 65.77, and 71.99% of the yield potential, respectively. The yield gaps between three pairs: CK and FP, FP and HH, and HH and SH, were 0.76, 1.23 and 0.85 t ha~(–1), respectively. By further analyzing the priority of management factors for reducing the yield gap between FP and HH, as well as HH and SH, we found that the priorities of the management factors(contribution rates) were plant density(13.29%)fertilizer(11.95%)hybrids(8.19%)irrigation(4%) for FP to HH, and hybrids(8.94%)plant density(4.84%)fertilizer(1.91%) for HH to SH. Therefore, increasing the planting density of FP was the key factor for decreasing the yield gap between FP and HH, while choosing hybrids with density and lodging tolerance was the key factor for decreasing the yield gap between HH and SH.  相似文献   

What can’t be taught     

Dan Cartwright 《The Canadian veterinary journal. La revue veterinaire canadienne》2014,55(10):999-914

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