共查询到20条相似文献,搜索用时 78 毫秒
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根据永州地区气候与土壤条件,从大树选择、定植地选择、移栽时间选择、移植与移植后的养护,以及移植过程中移植档案的建立等6个方面综述了园林绿化大树的移植技术。使用该技术在永州地区移植绿化大树,成活率达50%~95%,其中1~3月或11~12月移植成活率达85%~95%。 相似文献
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指出了近年来云杉大苗被广泛用于城市绿化、园林栽植、小康村美化及通道绿化等,如何提高移植成活率,直接关系到生态效益、景观效益和经济效益。从移植时期、移植前的准备、移植技术及栽后管理等方面探讨了云杉大苗的移植技术。 相似文献
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文章在红松优质壮苗的培育研究中,对平圃地常规移植、平圃地非常规移植、山地移植所生产的苗木,将其苗高、地径、一级侧根数量进行比较,结果表明,平圃地非常规移植、山地移植所生产的苗木的一级苗率好于平圃地常规移植所生产的苗木。 相似文献
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张亚东 《内蒙古林业调查设计》2010,33(5):40-40,48
樟子松、油松二年生留床苗换床移植后,移植的苗木不仅侧根主根长比留床苗均有增长而且根茎粗壮,侧根发育均称,生长量相对提高。移植地最好选在前茬育过松苗的土地,移植前需要整地、施肥、化垄。移植时间应选在春季土壤解冻达到30 cm时,移植方法采取高垄双行移植。移植苗的管理主要是保持土壤湿润,适时追肥,加强松土除草,越冬覆土。 相似文献
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园林苗木的培育和管理 总被引:1,自引:0,他引:1
从育苗和苗木移植两个环节详细介绍了园林苗木的培育和管理技术.对容器育苗和温室育苗两种方式进行了分别探讨.对移植前期准备、移植时期、移植方法和移植苗木的管理进行了介绍. 相似文献
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指出了近年来云杉大苗被广泛用于城市绿化、园林栽植、小康村美化及通道绿化等,如何提高移植成活率,直接关系到生态效益、景观效益和经济效益。从移植时期、移植前的准备、移植技术及栽后管理等方面探讨了云杉大苗的移植技术。 相似文献
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Past,current and future drivers for the development of decision support systems in forest management
The potential for development in decision support for forest management is set by decision theory, available technology and methods. Demands for decision support are emerging from contemporary challenges and problems of forest management which act as stimuli for the science community. Objectives and approaches in forest management as well as technologies have been changing throughout history. Accordingly, the demand for tools to support planning and decision-making has evolved. In this contribution, the authors review the historic development of decision support systems (DSS) for forest management and discuss past, current and future drivers. Based on evidence from scientific literature, case studies in the frame of the Forest Management Decision Support Systems (FORSYS) action, as well as experiences of the authors some hypotheses about the future of DSS are drawn. It is shown that in the past, the drivers evolving from forest management as well as decision support technologies have influenced the way of how models and methods have been applied as well as how DSS architectures have been designed. It is concluded that in the future, the challenges for DSS development will increase, as the complexity of decision-making processes and the related models will compete with the user demands which ask for simplicity. 相似文献
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本文从天然林的主要特点、功能和作用出发,论述了保护天然林资源的重要性,以及从砍伐天然林为主到砍伐人工林为主的这一转变的历和现实的必然性。 相似文献
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Eucalypt plantations 总被引:7,自引:0,他引:7
This paper reviews the historical development of the use of the eucalypt over 200 years, from its curiosity status in the botanical gardens of Europe to its extensive use as a fuelwood for the wood-burning locomotives of the national railway systems, and then to its more recent use as a major source of biomass for paper pulp, fiberboard, industrial charcoal, and fuelwood. Ecological and biological aspects of the genus Eucalyptus have made it successful as an exotic in industrial monocultures and as a multipurpose tree of benefit to small landholders. Social, policy, and economic aspects of growing Eucalyptus are examined, as are prospects for using the eucalypt in the twenty-first century as an industrial plantation tree and as a component of farming systems in the rural landscape. 相似文献
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特呈岛白骨壤古树群的调查分析 总被引:3,自引:2,他引:1
特呈岛白骨壤古树群是我国极其珍贵的红树林资源,该古树群有510株古树,依据古树植株生长势可分为4级:Ⅰ级树势良好株46.47%、Ⅱ级树势正常株37.45%、Ⅲ级树势衰弱株13.92%、Ⅳ级垂死株2.16%。建议加强该古树群的保护复壮管理。 相似文献
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记述了褐斑凤蝶(Chilasa agestor(Gray))和斑凤蝶(C.clytia(Linnaeus))的幼期形态特征、成虫和幼虫的主要习性.在四川峨眉,褐斑凤蝶1年1代,以滞育蛹越夏、越冬;成虫发生期在春季,访花;卵散产,幼虫5龄,分散栖息;以樟(Cinnamoneum camphors(Linn.)Presl)和楠木(Phoebe zhennan S.Lee et F.N.Wei)为寄主.在西双版纳国家级自然保护区关坪管理站,斑凤蝶实验种群1年发生5代,以蛹越冬;成虫访花,卵散产,幼虫5龄,分散栖息,末龄幼虫有鲜艳的警戒色;以玉兰叶木姜子(Litsea magnoliifolia Young et P.H.Huang)和潺搞木姜子(Litsea glutinosa (Lour.)C.B.Rob.)为寄主. 相似文献