浅析乌兰察布地区金叶榆嫁接以及嫁后管理技术     

徐翔宇  于泓民  马妍  常峥  岳颂民 《内蒙古林业调查设计》2015,38(1):64-65,69

金叶榆叶片金黄色,枝条密生,树冠丰满,生长旺盛,适合做多种造型,在园林绿化上应用较多;再者,抗寒、抗旱能力强,很适合在乌兰察布地区推广应用,为了满足绿化的需要,对该地区嫁接技术以及嫁后管理技术进行了总结,为当地金叶榆嫁接技术以及嫁后管理技术提供理论参考。  相似文献   

青花菜肉桂酰辅酶A还原酶基因的克隆与表达特征分析     

李小艳  裴徐梨  荆赞革  唐征 《热带作物学报》2016,37(11):2199-2203

为研究肉桂酰辅酶A还原酶在青花菜生长发育中的作用,采用RT-PCR技术克隆青花菜Bo CCR基因全长c DNA序列,并利用q RT-PCR检测其在不同器官中的表达模式。结果表明:Bo CCR基因开放阅读框为987 bp,推导编码328个氨基酸。预测蛋白分子量为36.86 ku,PI值为6.04。该蛋白亲水性氨基酸多于疏水性氨基酸,为亲水性蛋白。高级结构预测表明青花菜Bo CCR蛋白具有完整的二级结构,三级结构的α-螺旋主要位于外部,β-折叠位于内部。分子进化分析显示CCR蛋白在植物进化过程中,各属形成单独的分枝,可以区分其亲缘关系。荧光定量技术检测到青花菜的Bo CCR基因在花蕾发育早期表达最高,推测该基因可能与青花菜花粉发育相关。  相似文献   

基于商业云平台植物工厂环境监测系统的研究与实现     

尚志跃  曾成  张馨  郑文刚 《农机化研究》2017,(9)

植物工厂作为设施园艺发展的最高阶段,以其科技含量高、资源利用率高、高产优质等特点成为都市农业、垂直农业及太空农业等领域的研究热点。针对当前环境监测技术公网接入复杂、体积大及网络化管理程度低的问题,构建智能Wi Fi传感器,尝试采用商业云服务平台实现植物工厂内温度、湿度、光照强度及CO2浓度的采集并通过无线网络与云服务平台交互等功能,利用手机APP及PC端访问云平台两种方式完成植物工厂的远程监控。实验表明:本系统稳定性好、可靠性高,利用很少的网络带宽即可实时准确地将数据传输到云端。通过云平台的接入提高了数据服务的稳定性,无需重复构建云平台,提高了开发速度并降低应用成本,很好地满足了植物工厂环境监测的需求。  相似文献   

中美城市树木碳储存的现状对比研究   总被引：3，自引：0，他引：3  

任继勤  郑惠潆 《森林工程》2016,(4):28-30

本文采用对比研究的方法,对中美城市树木的碳储存和碳封存状况进行比较,结果显示我国的主要城市树木平均碳储量高于美国,单位面积碳储量平均值低于美国,揭示了研究城市树木的碳储存和碳封存具有重要的现实意义,为我国进一步提升城市的生态环境以及城市树木的种植提供了有益思路。本文建议:在进行城市树木补植补造的同时,重视树木种类的选择和气候条件;加大城市绿化的投入力度,加强植被复层结构的管理;加强体制和机制的建设,关注城市树木的种植和养护。  相似文献   

县域农技推广区域站站长选拔案例研究——基于迁安市的调查     

郭晶  郑佩佩  袁伟民  陶佩君 《中国农机化学报》2016,(4):279-284

为完善县域农技推广区域站管理制度,基于归因理论,并以迁安市为研究案例,调查迁安市8个农技推广区域站站长选拔现状,发现存在着选拔方式不合理、分值比例不协调、选拔标准不完善等问题;提出通过构建指标体系并完善选拔方式,以改进县域农技推广区域站站长选拔的制度设计。  相似文献   

Gas chromatography for detection of citrus infestation by fruit fly larvae (Diptera: Tephritidae)     

Paul E. Kendra  Amy L. Roda  Wayne S. Montgomery  Elena Q. Schnell  Jerome Niogret  Nancy D. Epsky  Robert R. Heath 《Postharvest Biology and Technology》2011,59(2):143-149

Tephritid fruit flies are serious economic pests worldwide. As larvae, they feed and develop within the pulp of host fruits, making infestation difficult to detect by visual inspection. At U.S. ports of entry, incoming produce shipments are checked for infestation by manually cutting open a small sample of fruit and searching for tephritid larvae. Consequently, there is a need for more sensitive, high-throughput screening methods. This study evaluated gas chromatography (GC) as a potential technology for improved detection of hidden infestation. Grapefruits (Citrus × paradisi Macfad.) infested with immature stages of the Caribbean fruit fly Anastrepha suspensa (Loew) (Diptera: Tephritidae) were examined to determine if infested fruit emitted a chemical profile distinct from that of non-infested fruit. Peaks identified by GC analysis were grouped into three classes. Chemicals detected in similar quantities in all samples, or slightly elevated in infested samples, were regarded as non-diagnostic background volatiles. Chemicals highly elevated after oviposition, during the last instar exit stage, and in experimentally-pierced fruit were interpreted to be indicators of citrus peel injury, and included d-limonene and β-ocimene. Chemicals elevated exclusively in the larval infestation stages were considered indicators of feeding damage and potentially diagnostic of infestation, and included hexyl butanoate and an unidentified compound. The peaks associated with injury and feeding were also detectable with a portable ultra-fast GC analyzer that required less than 80 s per sample. Further studies will investigate the potential application of these results for development of a rapid, non-destructive screening method for detection of tephritid infestation.  相似文献   

MeJA regulates enzymes involved in ascorbic acid and glutathione metabolism and improves chilling tolerance in loquat fruit     

Yuting Cai  Shifeng Cao  Zhenfeng Yang  Yonghua Zheng 《Postharvest Biology and Technology》2011,59(3):324-326

This study investigated the regulation of ascorbate acid (AsA) and glutathione metabolism and chilling tolerance by methyl jamonate (MeJA) in loquat fruit. The results showed that application of MeJA to loquat fruit inhibited the incidence of chilling injury manifested as internal browning (IB) and increased AsA and reduced glutathione (GSH) contents due to the inhibition of ascorbate oxidase activity and enhancement of monodehydroascorbate reductase, dehydroascorbate reductase and glutathione reductase activities. Meanwhile, MeJA also enhanced activities of ascorbate peroxidase, glutathione peroxidase and glutathione-S-transferase. Our results suggested that MeJA can regulate the ascorbate and glutathione metabolism and has important roles in alleviating oxidative damage and enhancing chilling tolerance in loquat fruit.  相似文献   

Ontogeny and kinetics of carnitine palmitoyltransferase I in hepatopancreas and skeletal muscle of grass carp (Ctenopharyngodon idella)     

Wei Hu  Zhi Luo  Kang-Sen Mai  Cai-Xia Liu  Jia-Lang Zheng 《Fish physiology and biochemistry》2015,41(6):1393-1401

  相似文献   

高剪切复杂流动中的液滴分散浅析   总被引：1，自引：0，他引：1  

郑素霞  谢建武  张燕 《农产品加工．学刊》2011,(10):57-63

研究高剪切复杂流动中的液滴分散过程及其应用于高压均质机的均质阀设计,考察均质效果。先从物理方程上分析,然后通过建模来验证理论分析的结果。采用UG建模,导入fluent软件进行模拟,改变流道数目、操作压力,以及进口速度,通过流场的流线分析,考察工艺条件的改变对最终均质效果的影响,为新型高压均质机的均质阀设计提供依据。  相似文献   

基于FTA的船舶冷藏集装箱故障的建立     

王富银  郑学林 《绿色科技》2011,(1):162-164

介绍了故障树分析法,并进行了理论分析,探讨了通过采用故障树分析方法,建立起船舶冷藏集装箱的故障集.  相似文献