杨柳树苗圃地化学除草技术

来源 :河北农业科技 | 被引量 : 0次 | 上传用户:landywww
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
1第1次用药扦插后芽苞尚未打开前,每亩用24%乙氧氟草醚乳油50~80毫升,对水50公斤,均匀喷雾于床面作土壤处理;或每亩用50%扑草净可湿性粉剂150毫升,对水50公斤,均匀喷雾于床面能有效地防除1年生单、双子叶杂草;也可每亩用20%百草枯水剂100毫升,对水50公斤,杀死刚刚萌动的杂草;除草醚与灭草灵混用时,有效成分用量每亩分别为133.4~266.8克、66.7~133.4克;草枯醚与扑草净混用,每亩分别用66.7~200.1克、33.4~66.7克.喷洒要均匀,尤其是插穗附近一定要喷到.以上药物对
其他文献
Visible-light communication(VLC)stands as a promising component of the future communication network by providing high-capacity,low-latency,and high-security wir
Quantum dots(QDs)are promising candidates for the next-generation optical and electronic devices due to the outstanding photoluminance efficiency,tunable bandga
Near-infrared excited rare-earth(RE)-doped up-conversion(UC)-luminescent materials have attracted enormous attention because of their unique emission properties
阐述了校园文化建设的概念,高校图书馆在校园文化建设中的地位、作用,图书馆如何发挥其教育功能并积极参加校园文化建设等内容。
Current freeform illumination optical designs are mostly focused on producing prescribed irradiance distributions on planar targets.Here,we aim to design freefo
We report the femtosecond(fs)laser fabrication of biomimetic omnidirectional iridescent metallic surfaces exhibiting efficient diffraction for practically any a
Few-mode and multi-core fibers are proposed and demonstrated for contactless vital signs monitoring in this paper.In-line optical fiber interferometers using fe
Mid-infrared(MIR)fiber pulsed lasers are of tremendous application interest in eye-safe LIDAR,spectroscopy,chemical detection and medicine.So far,these MIR lase
Solution processible photovoltaics(PV)are poised to play an important role in scalable manufacturing of low-cost solar cells.Electrospray is uniquely suited for
语用翻译是以追求语用语言等效和社交语用等效为目标的等效翻译。本文从JefVersueren的顺应理论角度出发,分别探讨了语用语言等效翻译和社交语用等效翻译中的顺应模式,认为译