论文部分内容阅读
药用树木非洲樱，其树皮具有极高的药用价值。由于受到掠夺式剥取树皮，资源迅速减少，喀麦隆推出新的采剥技术以利新皮再生。非洲樱首次剥去50％树皮后（见文中图示），4－5年后才能剥去余下的50％。这与我国杜仲合适的剥皮间隔时间^[1]相似。
非洲樱药用树皮的采收技术
【摘 要】
：
药用树木非洲樱，其树皮具有极高的药用价值。由于受到掠夺式剥取树皮，资源迅速减少，喀麦隆推出新的采剥技术以利新皮再生。非洲樱首次剥去50％树皮后（见文中图示），4－5年后才能剥去余下
【机 构】
：
贵州大学林学系
【出 处】
：
贵州林业科技
【发表日期】
：
2002年4期
其他文献
Q－double effect of different balance bridge voltage controlled crystal oscillator(DBVCXO)is quantitatively analysed by the computer simulation.
Digital TV(DTV)video signal transmission over ATM network is emphasized on.Some important problems are introduced about TV video signals asynchronous transfer t
针对国民对食用农产品质量要求越来越高,优质、安全、卫生的无公害农产品受到市场青睐的现实,江苏省泰州市海陵区委、区政府提出了"一年打基础、三年见成效、五年大变样"的长
A monolithic clock-recovery circuit used in 622Mb/s optical communication system is designed,which is based on the phase-locked loop theory,,and uses bipolar tr
A emthod of 2-D Fourier transform used in 3-D surface profilometry is proposed,analyzed and compared with 1-D Fourier transform method in theory and practical m
The photovoltage spectra of AlGaAs/GaAs multiple quantum wells at different vacuum have been measured and the vacuum sensitivity of photovoltage in reported.The
A conduction channel model is propsed to explain the high conductivity property of nc-Si:H.Detailed energy band diagram is developed based on the analysis and c
本文应用模糊数学原理对皖南地区烟区烤烟氮素的施用量进行综合评判。结果表明；各处理在亩施相同的磷钾肥的条件下，以亩施３－６ｋｇ纯氮的处理，烤烟内外观综合指标达较好水平。
A new type of piezoelectric transducer with compression/shear sense is developed and was successfully tested for measuring three dimension accelerations in shoc