共查询到19条相似文献,搜索用时 31 毫秒
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中国的年很长,直到农历二月二才是最后的尾声。农历二月初二,城市退去寒气染上了几分暖意。中国人有着过“二月二”的传统习俗,这一天,人们纷纷赶到理发店剪去过长的头发,希望在新春讨个好彩头,一起感受万物复苏、“理发去旧”迎新春的节日氛围,以新颜迎接新一年的精气神儿。 相似文献
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回顾总结了我国塑料门窗及异型材发展过程,现状及发展中存在的问题,并提出相应的对策,同时阐述了行业协会在行业发展中的应用。 相似文献
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走出去,建立境外钾肥生产基地 总被引:2,自引:0,他引:2
我国化肥生产中氮钾比严重失调,虽经进口钾肥的调整,施用的氮钾比仍与合理需要相差甚远。从国家战略层次考虑,必须建立具有较强控制和调节能力的钾矿资源稳定供应体系,以保证我国农业可持续的发展,走出去,利用两种资源、两个市场是我国国民经济发展的方针。资源问题涉及国家经济安全,根据我国“稳定周边”的原则,应以周边邻近国家的钾资源为主。本文简术泰国、老挝、俄罗斯以及乌兹别克斯坦、土库曼斯坦的钾资源情况和建议。 相似文献
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<正>新年贺词开篇语:2021年是党和国家历史上具有里程碑意义的一年。一年来,以习近平同志为核心的党中央团结带领全党全国各族人民,开启全面建设社会主义现代化国家、向第二个百年奋斗目标进军新征程,“十四五”实现良好开局。回望这一年,水泥行业每个人都了不起!我们坚持减污降碳、科技创新,加大市场整合、结构调整,引领行业高质量发展;我们贯彻常态化错峰生产和产能减量置换产业政策,推进行业供给侧结构性改革;我们强化行业自律诚信,勇担社会责任,打造共赢的行业生态文明。 相似文献
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分析2016年春节期间的空气质量情况,结果表明:春节期间广东省空气质量以优良为主,但空气质量等级变化较大。在除夕和初一,粤东西北地区空气质量出现轻度和中度污染,AQI指数整体高于珠三角地区,可能与除夕夜烟花爆竹燃放有关。春节期间,全省首要污染物以PM_(2.5)和PM_(10)为主,部分地区首要污染物为O_3。 相似文献
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由于鞭炮在燃放过程中会释放SO2和NOx等污染物质,该类酸性污染物以潮湿和干燥两种形式从大气中降落到地球表面,一般将这个过程称为酸沉降,形成pH5.6降水(酸雨),春节期间扬州市区鞭炮燃放现象较为严重,通过对扬州市2009年春节前后3个月3个自动监测点:市区东(扬州市第四人民医院),市区西(扬州市邗江区环境监测站),城郊北(扬州市平山茶厂)pH数据分析得出:由于春节期间燃放烟花炮竹市区两个点有酸雨形成,变化趋势明显,应该引起人们重视。 相似文献
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岁末年初,天然橡胶价格疯涨,1月20日上海期货所三、四、五月交货价格突破4万元/吨关口。综合各方面信息,预计我国轮胎行业年后将再次迎来涨价潮,且为大概率事件,预计时间节点在2月底或3月初,幅度5%-8%。 相似文献
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Judit Bnyai Marco Maccaferri Lszl Lng Marianna Mayer Viola Tth Mnika Cspl Magda Pl Klra Mszros Gyula Vida 《International journal of molecular sciences》2021,22(4)
A detailed study was made of changes in the plant development, morphology, physiology and yield biology of near-isogenic lines of spring durum wheat sown in the field with different plant densities in two consecutive years (2013–2014). An analysis was made of the drought tolerance of isogenic lines selected for yield QTLs (QYld.idw-2B and QYld.idw-3B), and the presence of QTL effects was examined in spring sowings. Comparisons were made of the traits of the isogenic pairs QYld.idw-3B++ and QYld.idw-3B−− both within and between the pairs. Changes in the polyamine content, antioxidant enzyme activity, chlorophyll content of the flag leaf and the normalized difference vegetation index (NDVI) of the plot were monitored in response to drought stress, and the relationship between these components and the yield was analyzed. In the case of moderate stress, differences between the NIL++ and NIL−− pairs appeared in the early dough stage, indicating that the QYld.idw-3B++ QTL region was able to maintain photosynthetic activity for a longer period, resulting in greater grain number and grain weight at the end of the growing period. The chlorophyll content of the flag leaf in phenophases Z77 and Z83 was significantly correlated with the grain number and grain weight of the main spike. The grain yield was greatly influenced by the treatment, while the genotype had a significant effect on the thousand-kernel weight and on the grain number and grain weight of the main spike. When the lines were compared in the non-irrigated treatment, significantly more grains and significantly higher grain weight were observed in the main spike in NIL++ lines, confirming the theory that the higher yields of the QYld.idw-3B++ lines when sown in spring and exposed to drought stress could be attributed to the positive effect of the “Kofa” QTL on chromosome 3B. 相似文献