【摘 要】
：
桉树是一种生长速度非常快的树种,其品种多样,具有非常高的经济价值,获得了非常广泛的应用。为了进一步扩大桉树的种植面积,要结合当地的地质和自然环境特点,选用适宜的造林
论文部分内容阅读
桉树是一种生长速度非常快的树种,其品种多样,具有非常高的经济价值,获得了非常广泛的应用。为了进一步扩大桉树的种植面积,要结合当地的地质和自然环境特点,选用适宜的造林技术,促进桉树种植水平的不断提高,同时,在桉树的整个生长过程中,还需要对其进行系统全面的维护管理,采取有针对性的病虫害防治措施,将病虫害的危害控制在合理的范围内,避免给桉树的正常生长造成严重的不利影响,进而为种植户带来良好的经济效益。
其他文献
Although there was a strong steric effect,isopentenyl and geranyl moieties were successfully introduced into C3 position in flavone skeleton so as to synthesize
Signal transducer and activator of transcription 3(STAT3) is a dual functional transcription factor with the functions of signal transduction and transcription
The development of nanotechnology provides a new method for genetic engineering.However,the nanoparticles as gene carriers have been mainly used in the mammalia
We studied the activation of β2-adrenergic receptor(β2 AR) by norepinephrine,epinephrine and isoproterenol using docking and molecular dynamics(MD) simulation
纯棉针织物在染整加工过程中,由于长期折叠和挤压、轧辊的轧压及采用离心脱水的原因,使线圈在短时间内产生差异,导致线圈的移位和变形,从而形成细皱纹.为此,在实际生产中,取
粤府办[2004]37号各地级以上市人民政府,各县(市、区)人民政府,省政府各部门、各直属机构:《关于促进县域经济发展财政性措施的意见》已经省人民政府同意,现印发给你们,请认
毛腈抽条双面绒,是我厂近年来开发并大批量投入生产的新产品.此产品起毛均匀整齐,手感柔和丰满,穿着舒适华贵,深受消费者喜爱.毛腈抽条双面绒在染色时,如果工艺条件控制不当
A simple, rapid and sensitive liquid chromatography-tandem mass spectrometry(LC-MS/MS) for the determination of glycyrrhetic acid in human plasma with ginsenosi
A facile and general method was described to coat six types of multi-walled carbon nanotubes, functionalized by either noncovalent or covalent way, with smooth
A new kind of comblike copolymer film composed of acrylic acid-polyethylene glycol monomethyl ether acrylate copolymer(AA-PEGMA copolymer) was successfully synt