绿化、美化新秀--中国垂杨

中国垂杨--是我国种植专家、华农华林国际农业发展研究中心研究员焦叙重先生依据我国林木育种学的原理,利用传统的常规稼接技术和现代科技相结合,对中国速生杨进行了上与下的处理,以本地杨小城黑为母本,以地方垂形杨为父本,经多年广泛选培新近育成。该垂形杨集各种速生杨的优点于一     

垂杨嫁接培育技术

垂杨是优良的城市绿化树种,通过改变传统嫁接方法,采用皮下接技术,田间精心管理,获得成功,嫁接成活率100%。为城市绿化、园林小区及景点绿化又增加一个优美、新颖的树种。     

浅谈垂杨嫁接培育技术

随着城镇园林化建设的飞速发展,城镇绿化水平逐年提高,绿化层次逐步升级。以高、新、奇、特绿化树种占据城乡绿化主体地位,其中垂杨在城乡一体化建设中倍受青睐,它是城乡绿化、林荫道绿化、广场街坊小游园、楼区庭院绿化、机关学校绿化的理想树种。其树干通直圆满,树冠垂而飘柔多姿,美丽壮观,深得人们的喜爱和认可,是今后提高城乡品位的首选树种。下面,本文就如何搞好垂杨培育,浅谈几点技术要领,供垂杨育苗者参考和借鉴。     

垂杨嫁接培育技术

随着新林区建设飞速发展,兴隆林业局绿化水平逐步提高,绿化层次逐步升级。以高、新、奇、特绿化树种占据林区绿化主体地位,其中垂杨在我局一体化建设中倍受青睐,它是林区绿化、林荫道绿化、广场街坊小游园、楼区庭院绿化、机关学校绿化的理想树种。其树干通直圆满,树冠垂而飘柔多姿,美丽壮观,深得人们的喜爱和认可,是今后提高我局品位的首选树种。下面,就如何搞好垂杨培育,浅谈几点技术要领,供垂杨充苗者参考和借鉴。     

垂杨嫁接育苗技术

垂杨,为人工嫁接的园林树种。枝垂到地面,极为优美。耐寒、抗旱,是优良高档绿化树种。为满足绿化需求,辽宁省辽中县成功地进行了垂杨嫁接育苗试验,现将其试验情况总结如下:一、砧木的选择一般选胸径在2.5厘米以上,树高2米—3米,干形通直、生长快、无树干病虫害的杨树做砧木。据     

垂杨嫁接繁殖技术

垂杨是优良高档绿化树种,在园林绿化上有较高观赏应用价值.文章介绍了嫁接繁育垂杨苗木及嫁接后的田间管理的技术.     

垂杨嫁接育苗技术

垂杨,为人工嫁接的园林树种。枝垂到地面,极为优美。耐寒、抗旱,是优良高档绿化树种。     

Dielectric properties of Simon poplar wood flour/polypropylene composite at oven-dry state

Interfacial compatibility is a crucial factor to the performance of wood-plastic composites （WPCs）. Yet, so far, the coupling mechanisms of WPC have not been completely understood. In order to further clarify the interfacial coupling mechanism, the dielectric constant and dielectric loss factor of Simon poplar wood flour/polypropylene composites without additives at different wood contents were measured at oven-dry state, and parameters and thermodynamic quantities of the relaxation process were also analyzed and calculated. Consequently, an obvious relaxation process based on the reorientation of methanol groups in amorphous region of wood cell wall was observed exactly that its dielectric loss factor peak decreased with the decreasing wood content within the measured range of 50%-100%. With the trend of dielectric relaxation strength, the two changing trends both revealed that the existence of polypropylene could hinder reorientation of methanol groups. Following the decreasing wood contents, the effect of the hindrance on the dielectric properties turned obvious gradually. It elucidated that introduction of polypropylene caused the quantities of hydrogen bonds formed between each methanol group and the groups around it change. The same conclusion could be drawn from the analysis of thermodynamic quantities during the dielectric relaxation progress.     

垂杨嫁接方法的研究

垂杨是继垂榆之后又一种抗逆性强、适应性广、姿态优美的园林绿化树种.在生产中常因嫁接方法及绑缚物解除时间不当,造成嫁接成活率降低.为探讨有效的嫁接方法,提高嫁接成活率,我们进行了本项研究.     

速生杨新秀--中国垂杨

中国垂杨是华农华林国际农业发展研究中心研究员焦叙重先生依据我国林木育种学的原理，利用传统的常规嫁接技术和现代科技相结合，对中国速生杨进行了上与下的处理，以本地杨小城黑为母本，以地方垂形杨为父本，经多年广泛选培新近育成。该垂形杨集各种速生杨的优点于一身，居倒垂柳、倒垂槐、倒垂榆之