共查询到19条相似文献,搜索用时 171 毫秒
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除草剂在林业上的应用 总被引:8,自引:1,他引:8
本文概述了国外林业化学除草剂的应用范围、应用效果、应用技术,以及国外林业化学除草的最新发展趋势。并探讨了我国林业化学除草的有关趋势及存在的问题,对发展有中国特色的林业化学除草事业提出了建议和意见。 相似文献
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林业化学除草剂在林业生产中应用已取得一定成效,化学除草法既可提高灭草效果,促进林木生长,又可降低成本。选择不同草类典型地段的防火线以及幼林地,进行不同除草剂配方比例的化学除草剂试验,并进行记录、对比观察,为今后在林业生产中推广使用提供依据。 相似文献
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林业化学除草技术 总被引:4,自引:1,他引:3
在整个林业生产过程中 ,草害是林木生长发育的大敌之一。世界上一些先进国家 ,如美国、日本、欧洲诸国等 ,早在 50至 60年代已将化学除草技术应用到苗圃、幼林抚育及造林整地等各个生产过程。而我国 60至 70年代才进行试验和在部分地区应用推广。1 林业化学除草技术1 .1 筛选开发适用于林业的化学除草剂 经 30多年 ,在全国 1 0多个省区 ,对落叶松、红松、樟子松、马尾松、黄山松、云杉、冷杉、国外松、杨树、杉木等主要造林树种 ,进行化学除草试验 ,从除草醚、西玛津、阿特拉津等几十种除草剂中 ,筛选出在林业生产中较为适用、效果较好的… 相似文献
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化学除草已成为我国林业生产不可缺少的组成部分,它可以减少人工成本,提高林业的经济效益。从除草剂使用的历史入手,分析了我国除草剂使用的现状,指出了新除草剂的研究方向和发展方向。并着重强调:除草剂对经济林木、绿化苗木的生理生化的影响,是目前急需解决的问题。 相似文献
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化学除草剂的除草原理及应用 总被引:4,自引:0,他引:4
化学除草剂是目前苗圃除草最常用的药剂,省工、经济、方便,效果较好。介绍了化学除草剂的除草原理以及除草剂的使用量、除草剂的使用方法和除草剂的施药方法。 相似文献
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在苗圃化学除草中应用了灰色决策分析,从除草效果、成本和经济效益这三个目标出发,通过综合效果测试的比较,选择出杉木、云南松和木荷3树种苗圃使用化学除草剂果尔的最佳用量。 相似文献
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结合林业化学除草技术的实际应用,分析了林业化学除草剂的特点及林业苗木的除草技术,为林业苗木生产和森林培育提供应用技术参考。 相似文献
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林业苗圃化学除草剂使用方便、高效、经济、对人畜安全。该文就林业苗圃化学除草剂的主要作用原理、部分主要苗木的化学除草技术、应用效果及使用除草剂应注意的事项进行了综述。 相似文献
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采用GVA除草剂的三种不同配方,取三种不同浓度,按L9(34)正交设计方法,进行除草灭草、杀草谱、毒性残留等试验,并与草甘鳞、威尔柏对比,以选择一种比人工建立生土带更为经济可行、易于推广的清除林农区过渡带火险可燃物的方法。 相似文献
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植物的异株克生是一种生物之间的化学关系。本文综述了植物异株克生的概念和在林业生产中的植物异株克生现象,为植物间的生化关系在林业生产中的应用提供参考。 相似文献
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Glyphosate is the herbicide most extensively used for site preparation and conifer release. It is a broadspectrum herbicide and therefore crop safety is a critical issue. This study assessed the early effects of 14 different treatments, including no weed control, manual weed control, and 12 foliar-applied herbicide treatments at low,intermediate, high, and highest application rates and application timing on glyphosate phytotoxicity of containerized seedlings of Austrian pine(Pinus nigra J.F.Arnold.), Scots pine(P. sylvestris L.) and maritime pine(P.pinaster Aiton), conifer species widely used for afforestation and supplementary plantings in Turkish forestry. In general, Scots pine seedlings were tolerant to glyphosate compared to the other species. Glyphosate phytotoxicity varied significantly according to the time and rate of application. Seedlings were relatively tolerant to glyphosate in April whereas they were intolerant in May. The highest herbicide rate(1.2% v:v) was consistently phytotoxic to all species. Moreover, the effect of herbicide rate on seedling survival and growth varied significantly according to application date(i.e., application rate 9 date interaction). Seedlings appeared tolerant to glyphosate at low and intermediate rates(0.2, 0.4% v:v) between midspring and mid-summer, whereas they demonstrated significant sensitivity to the highest rate across all time periods. Glyphosate at the high rate(0.8% v:v) was particularly more phytotoxic when applied in May. Application of glyphosate at rates up to 0.8% could be recommended for weed control without significant pine damage in midspring when the needles presumably have a dense leaf epicuticular wax layer limiting herbicide penetration.Applications of 0.8 and 1.2% v:v are not recommended during May–June. 相似文献
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世界林业科学现状与发展趋势 总被引:8,自引:0,他引:8
林业科学从源于森林的艰难起步,经过超越环境的掠夺式经营,到“接近自然之林业”及“新林业”的兴起,无不蕴涵着曲折而沉痛的教训。面对我国林业科研方法经典、手段落后,技术领先、理论滞后,成果丰硕、应用匮乏的优势和弊端,林业新技术革命的必要性和紧迫性与日俱增。林业科学的突破寄厚望于生物技术、信息技术在林业有关领域的融合并激发出新的科技生长点,为全球林业的可持续发展做出应有贡献。 相似文献
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A study was initiated in 1994 to evaluate the effects of bedding timing and frequency and pre-plant herbicide application, with and without post-plant herbaceous weed control, on growth of three slash pine (Pinus elliottii Engelm.) plantations and one loblolly pine (Pinus taeda L.) plantation on flatwoods sites. Site preparation treatments included early bedding alone, late bedding alone, double bedding, early bedding plus banded pre-plant herbicide, and early bedding plus broadcast pre-plant herbicide. Each site preparation treatment was tested with and without a first-year post-plant herbicide application for herbaceous weed control (HC). Results ranging from age 5 to 11 are reported, depending on installation. Pine growth following late bedding alone was similar or greater than that with early bedding alone. Double bedding did not consistently increase pine growth as compared with single bedding alone. Early bedding plus either broadcast or banded pre-plant herbicide application generally exhibited greater pine growth than did bedding alone treatments or bedding plus post-plant herbaceous weed control treatments. Broadcast pre-plant herbicide application resulted in similar or greater growth than banded pre-plant herbicide application. Post-plant herbaceous weed control improved loblolly pine growth across all site preparation regimes on the one test location. For slash pine plantations evaluated, post-plant herbaceous weed control resulted in significant growth increases on some but not all sites. The differences in growth response to bedding and pre- and post-plant herbicide applications are discussed in relation to treatment efficacy in controlling woody shrub and herbaceous competing vegetation. Effective bedding and chemical site preparation reduces the need for post-plant herbicide applications for slash pine on certain sites. Good site preparation, including the application of herbicides for competition control, is essential for fast growing slash and loblolly pine plantations in the flatwoods. 相似文献