A study on the changing values of form index andgeometrical solids of tree stem;
形状指数的变动及树干几何体变化规律的研究
An organo phosphorous pesticide-monocrophos that has long persistent effect period and broad-spectrum insecticidal activity was injected into Italian poplar stem through the bored hole in basal part.
在意杨树干基部钻眼 ,注射持效期长、杀虫谱广的有机磷农药久效磷 ,经其木质部的导管、管胞输送到叶片 ,通过胃毒作用杀死意杨叶面害虫 ,效果好、持续时间长。
Based on the study on distribution law of moisture content of stem(barking)for Eucalyptus grandisxurophylla,this paper presented that the moisture content of stem(barking)for Eucalyptus grandisxurophylla could be gained by investigating the moisture content of stem at relative tree height 3/10,which would reduce work in investigating biomass of stem (barking)for Eucalyptus grandisxurophylla.
研究巨尾桉树干 (去皮 )含水率的分布规律后 ,认为巨尾桉树干 (去皮 )的含水率可以采用调查 3/1 0 H处的含水率获得 ,大大减小巨尾桉树干 (去皮 )生物量调查工作量 。
Two Trunk-damaged Diseases of Eucalyptus and the Control Methods;
桉树树干两种病害及其防治
Distribution of Urocerus gigas taiganus emergence holes on larch trunks;
泰加大树蜂羽化孔在落叶松树干上的分布
The oviposition amount of Dictyoploca japonica on Juglans mandshurica trunk is positively related with the age of stands,breast diameter and the degree of bark crack and negatively related with the height of trees.
银杏大蚕蛾 Dictyoploca japonica Moore在胡桃楸 Juglans mandshurica树干上的产卵量与林龄、胸径及树皮开裂程度成正比 ,而与树高成反比 ;山的北坡、西坡、山下腹较东坡、南坡、山的中上腹产卵量高 ,树干的北面和西面的产卵量高于南面和东面。
Nitrate nitrogen content of stem flow of evergreen broad-leaved forest in Tiantong is determined by phenol disulfonic acid method in August 2007.
通过测定天童常绿阔叶林2007年8月份降雨和树干径流中硝态氮含量,分析8月份全部降水过程树干径流中硝态氮的变化规律及其与其它生态因子之间的相互关系。
Characteristics of Precipitation Redistribution and Stemflow in Quercus acutissima Mixed Forest in Miyun, Beijing;
北京密云麻栎人工混交林降水再分配及树干茎流特征
Characteristcs of Precipitation and Plantation and the Stemflow of Constracted Forest in Qianyanzhou Experimental Station;
千烟洲试验区大气降雨特征及人工林树干茎流特征
Characteristics of precipitation and forest stemflow of Dongling Mountainous area;
东灵山地区大气降水特征及森林树干茎流
The forms of emanant and trunk are mostly used in the system of 10 kV distribute power now.
针对目前10kV配电系统多采用放射式或树干式结构,阐明环网型10kV配电系统的发展方向,以及环网型10kV一次设备的优化选择,介绍环网型10kV配电系统在实际中的设计使用,最后指出环网型10kV配电系统存在的不足。
Pesticide effects on some protective enzymes and dissociative proline in willow by trunk injection;
树干注药对柳树几种保护酶活性及游离脯氨酸含量的影响
The field bioassay of three control methods(trunk injection,foliar spraying and fog spraying) were applied to control Acantholyda posticalis at different scenic spots in Louguantai Forest Park,Shaanxi Province.
以危害油松的阿扁叶蜂为试验对象,研究了树干注药防治、叶面喷雾防治及烟雾防治等施药技术对楼观台国家森林公园不同景区、不同立地条件油松松阿扁叶蜂幼虫防治效果。
Distribution of imidacloprid in walnut tissues after trunk injection was examined by high performance liquid chromatography(HPLC).
采用高效液相色谱(HPLC)测定了吡虫啉经树干注药后在核桃树体中的分布动态。