2021年6月下旬发现兰州市园林树木绒毛白蜡枝梢青枯羽状复叶青枯,观察发现为茎蜂类蛀虫危害症状,初步判断蛀虫为白蜡外龄茎蜂.调查发现,白蜡同样受茎蜂危害;两种白蜡属树木受害株率近85％,受害枝梢次年一般能正常发芽抽枝.兰州市白蜡树茎蜂危害尚不算严重,但需严密监测虫情,及时防治.

我国林业绿化建设时,经济林树木是其中的重要组成部分,被广泛关注.对于林业绿化而言,其不仅需要考虑树木的美学、生态和经济等功能,同时还需要了解树木生长习态,通过科学的技术种植、管理树木,将经济林树木的作用充分发挥出来.基于此,本文就经济林树木在林业绿化中的应用展开研究,首先阐述了其作用和配植,其次详细分析了其应用.

林业科研档案利用率低下,成为"死"档.从林业科研档案属性、职能定位、现状开展研究.认为备查属性决定档案在许多方面依然价值巨大,是宝贵的信息资源,科研档案在科研活动中更据有核心信息资源地位:是科研工作的重要参考和遵循,是推动科技进步起点;是单位文化的重要组成部分;是重要的宣传工具.进而指出,林业科研档案利用率低下的原因在于档案意识淡薄、工作理念滞后、纸质档案借资料不便等因素影响.提出林业科研档案激活对策:建立电子科研档案系统,普及档案有关法律法规和知识,全面培养增强档案意识.

本文针对当前经济林常用的病虫害综合防治技术进行了论述,从林业防治技术、生物防治技术、化学防治技术、物理防治技术、林木检疫防治技术几大角度分别进行了论述,以期能为同行产生几点启发.

绿色经济理念下,林业生态建设已经逐渐成为当前我国发展的重要组成部分.而林业发展关系着社会的发展,其所衍生的产品便利了人们的日常生产生活.为了满足人们日益提高的生态环境要求,需要加大林业发展力度.基于此,本文就林业产业发展及其生态建设关系展开研究,首先阐述了生态林业,其次对二者关系进行了分析,最后提出了一些发展措施,以期能够推动林业发展建设活动.

在生态建设中林业产业是主体,能够保障生态安全,可以促进人类和自然和谐发展.然而现阶段存在很多环境污染问题,会直接或者是间接破坏生态建设,频繁发生的自然灾害使人们深刻认识到,保护森林即为保障自己生存的家园,能够为人类营造和谐、可持续发展的自然环境.在我国近些年来各个地区林业局在林业产业发展中将生态建设当作重点.此外,强化生态建设、保障生态安全可以促进国民经济进一步发展.因此本文将围绕林业产业和生态建设的联系进行分析,分析两者间的关系,探讨目前存在的矛盾,最后提出林业产业和生态建设共同健康发展的途径,以供参考.

为了选择最适宜于甘肃文县碧口茶区幼龄“黄金芽”光温管理的方式,本文以2年生的“黄金芽”茶苗为试验材料,研究了单一棚膜(T1)、单一遮阳网(T2)、棚膜+遮阳网(T3)等3种不同的光温管理方式对“黄金芽”叶片光合生理学参数、叶绿素、叶片结构、叶片可溶性糖和淀粉含量等的影响,以无棚膜无遮阳网(CK)作为对照.结果 表明:T2和T3的“黄金芽”叶片叶绿素a、叶绿素b、叶绿素a+b含量显著高于T1和CK,且T1的“黄金芽”叶片叶绿素a、叶绿素b、叶绿素a+b含量显著高于CK;没有遮荫处理的“黄金芽”第5叶的Pn最高,遮荫后“黄金芽”不同叶龄(第2叶～第6叶)的Pn之间无显著性差异;遮荫可以提高“黄金芽”叶片的淀粉含量;遮荫后“黄金芽”叶片的栅栏组织的层数增加且排列更整齐紧密.本试验基本表明T3是甘肃省文县碧口茶区幼龄‘“黄金芽”栽培光温管理的首选方式.

Based on the present situation of ecological restoration of debris flow in the middle Bailong River, the plant selection principles on ecological restoration were proposed and the 18 species of plant on ecological restoration were selected. Then, aimed at the 18 species of plant, the plant morphology, multiply, ecological habit and ecological function were discussed.

In order to improve rooting rate of olive cutting seedlings,shorten seedling period,and decrease cost of seedling,effects of different roughness and length of cutting slips with or without lateral branches on rooting rate of olive cutting were compared by using hotbed and cooling bed.The results show that breeding cycle of olive cutting seedlings in hotbed is shorter than that of conventional cutting seedlings,cutting seedlings in hotbed can root after 40 days,and rooting rate is over 91.0%.The cutting slips with lateral branches have the highest rooting rate,which are 0.4-0.6 cm coarseness and 13-15 cm length,after soaked into 100 mg/L of IBA for 2 hours.

Leccino cultivars were cultivated widely in Longnan of Gansu province,and growth rhythms of branches and fruit were studied by taking Leccino cultivars as test materials in this paper.The results showed: annual height growth process of new shoots height of olive showed rhythm of "fast-slow-fast-slow",fitted curve for growth of new shoots and development days: y=0.367x2-0.011x+23.628,three growth peaks in annual growth cycle appeared,namely 1～15 of April,16～30 of June,and 14～29 of August;two growth peaks of annual growth of fruit appeared respectively from late June to early and middle of July and to middle and late September.Meanwhile,suggestions about fertilization were put forward according to growth rule of branches and fruit.