绿秆黄槽白夹竹生物学特性的研究

绿秆黄槽白夹竹(Phyllostachys nidularia)是天然形成的园艺新品种,1989年以来,对其生长发育特性以及与环境条件的关系进行了研究,揭示了它的“地下茎—笋—幼竹—成竹”的生长规律以及出笋和退笋的特点,为制订科学的培育技术措施提供依据。     

实行森林分类经营需要处理好的六个关系

林业分类经营改革是实行林业可持续发展的关键，为了推进林业分类经营改革，笔者以六个方面分析阐述了在分类经营改革中需处理好的六个关系。即：分类经营与综合经营的关系；分类经营与市场经济的关系；分类经营与传统林业的关系；商品林与公益林的关系；分类经营与林业企业转机建制的关系；分类经营与可持续发展的关系。     

Genetic Relationships among Prunus mume var. pendula Using AFLP Markers

Genetic relationships among Prunus mume var. pendula were studied by using AFLP markers. 18 accessions representing 14 cultivars ofPrunus murne var. pendula were selected from the germplasm collection at the Research Center of China Mci Flower. Seven Mse I-EcoR I AFLP primer combinations revealed 450 legible bands, and 269 of which were polymorphic markers. A similarity matrix was prepared using the simple matching coefficient of similarity and Nei‘s (72) distance coefficient. A UPGMA dendrogram demonstrated the genetic relationships of the cultivars. The information given by AFLP markers was basically consistent with the morphological classification and the evolutionary history of the morphotypes, and roughly supported the new revised classification system for Chinese Mci Cultivars. But there were still several exceptions: 1) the ‘Guhong Chuizhi‘ inserted between the ‘Tiaoxue Chuizhi‘ and the ‘Danfen Chuizhi‘; 2) the ‘Wufu Chuizhi‘ kept off the Pink Pendant Form, and the ‘Moshan Chuizhi‘ was removed from Viridiflora Pendant Form; 3) the ‘Danbi Chuizhi‘ and the ‘Shuangbi Chuizhi‘ of Viridiflora Pendant Form got together well but fell within the Pink Pendant Form.     

Study on half-scale model test for light-frame shear wall

A half-scale model of a light-frame shear wall was developed to evaluate the racking performance of a fullscale shear wall (prototype). The effect of nail size on the performance of the shear wall was also investigated using models constructed with three types of nail. Materials for the model were determined through experimental methods, which included nail-head push-through, stud-to-sheathing nail connection, and static bending tests. Materials with which the model was made to be in similarity to the prototype were three-layer 4.8-mm plywood, 39.72-mm long nails, and 1 × 2 lumber cut from 2 × 4 studs. In accordance with ASTM E 72 and ASTM E 564, racking resistance tests were conducted on 20 shear walls. The results showed that the maximum load capacities of the prototype walls could be evaluated by the model without significantly different failure modes. Tests on the effect of nail size revealed that increasing the nail head diameter may improve the performance of shear walls.Parts of this paper were presented at the International Conference on Effective Utilization of Plantation Timber (ICEUPT'99), Chi-Tou, Taiwan, May 1999; and the World Conference on Timber Engineering (WCTE2000), Whistler, Canada, July–August 2000     

白云山森林植物病害的调查

1998-2000年期间对白云山风景区主要森林植物病害进行了调查，发现病害共计59种，分布于44种寄主植物中，病害类型比较丰富，其中以叶部病害为主，病原涉及真菌、细菌、植物菌原体等多种寄生物及非侵染性病原，其中又以真菌为主，病害发生普遍，但为害较轻，没有发现严重的危害性病害。     

Correlation between Chemical Structure and Biological Activity of Host-Selective Plant Pathogen Mycotoxins

Toxin, one of the most important factors of plant fungal disease, has attracted much attention of many academicians who have been studying pathogen mycotoxin in deep research. The paper summarized chemical structures of some host-selective plant pathogen mycotoxins discovered in recent years and the correlation between biological activity and chemical structure of toxin.     

朝仓花椒组织培养快繁试验

以朝仓花椒为试材，研究了其组培快繁技术。试验表明，4～5月份接种外植体易获得无菌苗；初期适宜的增殖培养基为MS＋6-BA1．0mg／L（单位下同）＋IBA0．2＋3．0％蔗糖，继代增殖培养基为MS＋6-BA0．5＋IBA0．1＋3．0％蔗糖，适宜的生根培养基为1／4MS＋NAA0．3＋2．5％蔗糖，移栽最佳基质为蛭石。     

快速固化水泥刨花板的工艺试验

以速生杉木加工剩余物为主要原料、Na2SiO3为快速固化添加剂制备水泥刨花板,研究了冷、热压两种压板方式、Na2SiO3添加量、热压温度、热压时间、水灰比、灰木比、水泥种类和刨花形态等因素对水泥刨花板主要性能的影响.结果表明,热压法可适用于水泥刨花板制造,最佳工艺条件为:Na2SiO3添加量10%、热压温度95℃、热压时间12 min、水灰比0.6、灰木比2.6,制备的水泥刨花板的静曲强度达到10 MPa;采用MgCl2后处理能显著改善板的性能.     

阻隔法防治草履蚧研究

通过对草履蚧[Drosicha corpulenta (kuwana)]进行胶环，毒环，绑扎塑料裙和毒绳等阻隔试验，结果表明，应用废机油加羊羊脂（5:1)进行涂环阻隔防治，效果最好，其粘性持续时间达到80－120d，利用“阻隔法”防治草履介的防治最佳时期应设在草履蚧卵开始孵化至上树前的1月上旬－2月上旬。