七叶树种子级别与种子活力及苗木品质的相关性研究   总被引：1，自引：0，他引：1  

张运吉  赵兰勇  郭蕊 《山东林业科技》2005,(2):5-7

以七叶树种子为实验材料，并分级别绘制了种子的吸水曲线、测定了种子活力指数；同时，把种子按不同级别温室播种，分别测定其幼苗的苗高、地径、水势及电导率并作相关性分析。结果表明，种子级别与种子活力有相关性，中粒种子活力最强，小粒种子活力最弱；种子级别与苗木品质也有极显著的相关性，大粒种子萌发苗品质最好，小粒种子萌发苗品质最差。  相似文献   

A new nitroethylphenolic glycoside from Semiaquilegia adoxoides   总被引：1，自引：0，他引：1  

Su Y  Zhang Z  Guo C 《Fitoterapia》2004,75(3-4):420-422

The isolation of a new nitroethylphenolic glycoside, 4-hydroxy-1-(2-nitroethyl) benzene 4-O-(6'-O-beta-D-xylopyranosyl)-beta-D-glucopyranoside (1), from the roots of Semiaquilegia adoxoides is reported.  相似文献   

黄花矶松组织培养技术   总被引：2，自引：0，他引：2  

郭立明  马少梅 《内蒙古林业科技》2006,32(4):18-19

以黄花矶松的种子为材料,经过消毒后接种在不同激素水平的MS培养基上诱导小苗。结果表明:(1)MS 6BA0.3 NAA0.05培养基诱导率最高;(2)在不同配方的增殖培养基中MS 6-BA0.3 NAA0.6培养基的分化系数最高,苗长势最强;(3)在不同浓度的生根剂中MS/2 IBA0.6 NAA0.2培养基生根率最高,生根时间最短,且生根较一致,根系较发达,苗叶色正常,褐化程度较弱。  相似文献   

粘虫胶的应用技术   总被引：7，自引：0，他引：7  

郭小军  温秀军  韩会智  赵志新  王振亮 《林业科学》2007,43(9):31-37

对粘虫胶的应用范围和使用方法进行试验研究.油松毛虫和落叶松毛虫的防治效果达95%以上,枣树红蜘蛛、食芽象甲的防治效果达95%以上,与引诱剂(或诱饵)结合用于防治苹果金纹细蛾,防治效果达85%以上.还可用于防治绿盲蝽蟓、春尺蛾、草履蚧等多种害虫.应用粘虫胶防治害虫,成本低廉、可以显著减少化学农药的用量、提高防治效果、降低防治成本.粘虫胶可广泛应用于林业、果树以及卫生和城市害虫的测报及防治.  相似文献   

用电子显微镜研究干法无胶硬质纤维板的结构   总被引：2，自引：0，他引：2  

曹忠荣  郭文莉 《林业科学》1997,33(1):93-98

用扫描电子显微镜对未浸水和浸水后的干法无胶硬质纤维板进行观察，以获得有关无胶纤维板内在结构的变化，这可以更好地了解无胶纤维板的强度和耐水性能，在制造纤维板过程中，通过热磨使木材纤维在胞间层分离，并在热压时受压力作用再次结合，纤维重新结合的状况决定了纤维板的物理力学性能，经电镜观察的无胶纤维板，纤维间相互交织且结合紧密，即使是浸水后，纤维间的结合仍未出现松散现象，这表明不施加胶粘剂制造的干法硬质纤维板可以具有优越的强度和耐水性能。  相似文献   

Biotechnology and its future     

Guo Chengliang  Xu Sheng  Yu Sun 《林业研究》1993,4(1):31-35

  相似文献   

沙地樟子松树坨移栽技术研究     

尤国春 《防护林科技》2002,(4):14-16

为提高沙地大树移栽成活率 ,尽快成林 ,本文论述了沙地移栽大树坨成败因素、方法 ,提出樟子松树坨以 6～ 8年生为最佳 ,超过 10a不宜移栽。同时提出沙地树坨移栽的 2种新方法  相似文献   

生物多样性的形成、维持机制及其宏观研究方法   总被引：7，自引：0，他引：7  

郭志华  臧润国  蒋有绪 《林业科学》2002,38(6):116-124

关于生物多样性的形成与维持机制 ,虽有众多假说 ,但均未形成完善的理论体系。不同的学者从不同的角度出发 ,研究了诸多生态因子与生物多样性的关系 ,得出了许多结论、导出了不少争议。本文主要简述了生物因子 (如生产力、生物量、种间关系、土壤微生物 )和非生物因子 (干扰与空间异质性、气候、土壤因子等 )与生物多样性之间的相互作用机理、人类活动对生物多样性的影响 ,以及在生物多样性影响机制研究中所用的 3S技术与数学方法。总之 ,我们应坚持综合作用的观念 ,从不同的时间和空间尺度、在不同的对象层次上 ,全面、深入地研究各类生物和非生物因子与生物多样性之间的相互作用机理 ,才能得出关于生物多样性的形成与维持机制的全面、完善的理论  相似文献   

Analysis of the change in the original Metasequoia glyptostroboides population and its environment in Lichuan, Hubei from 1948 to 2003     

Xiqun Wang  Lüyi Ma  Baoxiang Guo  Shenhou Fan  Jianxi Tan 《Frontiers of Forestry in China》2006,1(3):285-291

Lichuan, located at the foot of the Wuling Mountain in southwest Hubei Province of central China, is well known in the world for the discovery of the living fossil Metasequoia glyptostroboides Hu & Cheng in the 1940s. Its natural habitat has been well protected by the Chinese government. In order to provide a scientific foundation for the protection of the Metasequoia resource, it has become necessary to analyze the changes in the original, natural Metasequoia mother trees (ONMMT) and their environment from 1948 to 2003. The results and countermeasures are as follows: First, the distribution areas have little changed, involving four towns/farmland, 45 villages, 5,746 individual trees in 1983 and 5,388 trees in 2003, covering nearly 600 km², with an average density of less than 0.1 tree/hm². The Metasequoia distribution consists of two main types: a scattered distribution type found mainly at the foothills or near houses, roads, villages and rivers while the population distribution type is found mainly at the mountains and valleys with a minority at low elevations in the mountains and basins. The largest Metasequoia populations have 105 and 123 trees. Second, in the past, attention was only paid to the protection of individual trees while the protection of the Metasequoia population and environment was neglected. This led to a shift from the past mixed forests to pure Metasequoia forests, with a simpler structure, reduced biodiversity and conditions non-conducive for natural renewal. From 1983 to 2003, 386 original Metasequoia mother trees died. So it is vital to enhance the protection of the only original Metasequoia population in the world and its habitat. Third, modern ecological means should be taken to protect the original Metasequoia population and its habitat. Research on the restoration and rehabilitation of Metasequoia vegetation should be carried out. Restoration and rehabilitation should be put into practice in the Xiaohe Valley, where the highest concentration of Metasequoia is found. Fourth, efficient measures should be taken to stop human activities that are harmful to Metasequoia and to improve the environment of ONMMT in order to promote the protection of the ONMMT population and its ecosystem. Eco-emigration and the return of marginal agricultural land to forestry can be practiced. __________ Translated from Acta Ecologica Sinica, 2005, 25(5): 972–977 [译自: 生态学报, 2005, 25(5): 972–977]  相似文献   

健康黑松幼苗中的电波传递     

郭建赵博光  周开亚 《林业研究》2004,15(2):135-137

以健康黑松(Pinus thunbergii)幼苗为材料,用非伤害性刺激,如冷冻和伤害性刺激,如：烧伤、刺伤、化学伤害等引发了植物体内的波形的变化,研究表明,非伤害性刺激能在幼苗体内引起动作电波的传递,伤害性刺激除了能引起动作电波的传递外,还能引起较为复杂的变异电波的传递并对这种现象进行了讨论。图4参28。  相似文献