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近年来,城市园林绿化施工的管理问题逐渐成为人们的研究对象。文章对城市园林绿化施工的安全管理、材料管理、质量管理、进度管理和成本管理进行了深入的探讨。 相似文献
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介绍了国内外对"注意力"、"注意力管理"研究的现状.论述了注意力管理在生态旅游景区中应用的重要意义.生态旅游景区的注意力管理包涵经营者的注意力管理,对环境保护的注意力管理、员工的注意力管理、生态旅游者的注意力管理、当地居民的注意力管理等. 相似文献
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本文在调查昆明城镇绿地保有率、养护管理质量、养护管理组织结构、养护管理人员、养护管理资金量及其来源、养护管理成本的核算等情况,分析昆明城镇绿地养护管理存在的问题,提出昆明城镇绿地养护管理的对策,通过对策的提出,解决昆明城市城镇绿地养护管理中存在的问题。 相似文献
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企业由管理内容、管理形式、管理制度等所形成的管理理念和被管理的具体人、事、物、组织等构成了企业文化。形成了一种企业精神，是区别其他企业的特征。而这一切都是人去组织和落实的，所以人力资源管理在企业管理活动中具有举足轻重的作用。 相似文献
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文章从设施樱桃升温及覆盖物撤除、整形与修剪、温湿度管理、肥水管理、花果管理、病虫害防治等6方面简要阐述了设施樱桃栽植过程中管理技术,旨在为生产上设施樱桃管理提供理论依据。 相似文献
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加强绩效计划管理、绩效过程管理、绩效考核管理、绩效反馈与绩效改进四个绩效管理的关键环节管理,加大宣传和贯彻及培训力度,加大企业文化宣传,以实现绩效管理的有效实施和持续改进。 相似文献
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引入智能化、一体化管理体系，以省级自然保护地管理为研究案例，探索自然保护地的综合信息化管理，研究自然保护地多类型、多数据库的标准化建设和融合管理，分析自然保护地不同数据类型特点。根据自然保护地的管理需求，研建数据、资源、监测、管理等4个独立模块系统组成的自然保护地管理平台，从技术上解决多部门、多类型数据的传统管理、数据更新等问题，从管理上理顺自然保护地设立、调整、撤销以及建设项目等工作的线上流程，从应用上实现单个平台对自然保护地多方面、多角度的综合管理，有力支撑了自然保护地的智慧化、便捷化管理，提升了自然保护地的综合管理水平。构建的平台适用于省级自然保护地管理，可推广至各省级自然保护地管理部门使用，以推进我国以国家公园为主体的自然保护地体系建设管理的发展。 相似文献
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介绍了国内外气动剪枝机的发展现状及特点,在总结分析国内现有气动果树剪枝机存在问题的基础上,对我国气动果树剪枝机的研发方向提出了建议。 相似文献
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The effects of crown pruning of mature indigenous fruit trees of Vitellaria paradoxa C. F Gaertn (commonly known as karité) and Parkia biglobosa (Jacq.) R. Br. ex G. Don (commonly known as néré) on recovery of crown size and fruit yield were assessed during 6 years
in an agroforestry parkland system in Burkina Faso. Three treatments of crown pruning (total-pruning, half-pruning and a control
of no-pruning) were applied to karité and néré. Each treatment comprised ten individuals of each species or a total of 60
trees of both species. Six years after pruning, higher recovery (81%) of crown diameter was achieved in total-pruned trees
of néré as opposed to karité which recovered by only 73%. On the contrary, fruit production in total-pruned trees of karité
recovered by 83% 5 years after pruning and fully (100%) 6 years after pruning as opposed to néré which recovered by only 57%
5 years after pruning but declined to 16% on the sixth year probably due to interannual variability. Fruit yields did not
differ significantly between unpruned and half-pruned trees of both species throughout the experiment period. Total pruning
may, therefore, be recommended to farmers to rejuvenate old trees of karité in parklands on the basis of fast recovery of
fruit and slow recovery of crown in the species. Slow recovery of crown in pruned trees is the most desirable characteristic
in parklands in order to avoid the negative effect of tree shade on adjacent crop. 相似文献
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We studied the relief of water stress associated with fruit thinning in pear (Pyrus communis L.) trees during drought to determine what mechanisms, other than stomatal adjustment, were involved. Combinations of control irrigation (equal to crop water use less effective rainfall) and deficit irrigation (equal to 20% of control irrigation), fruit load (unthinned and thinned to 40 fruits per tree) and root pruning (pruned and unpruned) treatments were applied to pear (cv. 'Conference') trees during Stage II of fruit development. Daily patterns of midday stem water potential (Psi(stem)) and leaf conductance to water vapor (g(l)) of deficit-irrigated trees differed after fruit thinning. In response to fruit thinning, gl progressively declined with water stress until 30 days after fruit thinning and then leveled off, whereas the effects of decreased fruit load on Psi(stem) peaked 30-40 days after fruit thinning and then tended to decline. Soil water depletion was significantly correlated with fruit load during drought. Our results indicate that stomatal adjustment and the resulting soil water conservation were the factors determining the Psi(stem) response to fruit thinning. However, these factors could not explain differences in daily patterns between g(l) and Psi(stem) after fruit thinning. In all cases, effects of root pruning treatments on Psi(stem) in deficit-irrigated trees were transitory (Psi(stem) recovered from root pruning in less than 30 days), but the recovery of Psi(stem) after root pruning was faster in trees with low fruit loads. This behavior is compatible with the concept that the water balance (reflected by Psi(stem) values) was better in trees with low fruit loads compared with unthinned trees, perhaps because more carbon was available for root growth. Thus, a root growth component is hypothesized as a mechanism to explain the bimodal Psi(stem) response to fruit thinning during drought. 相似文献
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In August, eight 4-m tall citrus trees were pruned by removing the top third of their canopy. Eight unpruned trees served as controls. Root growth, which was examined nondestructively with minirhizotrons over a four-month period, tended to be less in the pruned than unpruned trees seven days after pruning and this difference was significant (P < 0.05) from 14 to 49 days after pruning. Total reducing and ketone sugars (includes free fructose, sucrose and fructans) in the fine roots were less in pruned than unpruned trees 20 days after pruning, but not thereafter. By 30 days after pruning, at least 20% of the roots of the pruned trees at a soil depth of 9 to 35 cm apparently died. By 63 days after pruning, root length density had recovered to that of the unpruned trees, although starch reserves were 18% less in the fine roots of pruned than unpruned trees at this time. Nine to eleven months after pruning (May to July), total biomass of leaves and fine roots to a depth of 1 m were similar in pruned and unpruned trees. However, fruit biomass harvested in April from pruned trees was only 24% of that in the unpruned trees. In May, nonstructural carbohydrates in the fine and coarse roots of pruned trees were generally greater than in unpruned trees, possibly reflecting previous differences in fruit production. 相似文献
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不同树体环境和管理水平对苹果树梨树腐烂病发生程度的影响 总被引：3，自引：0，他引：3
苹果树梨树腐烂病是对果树危害严重的一种病害,对果树生产造成了较大的威胁。通过对苹果树梨树腐烂病发生程度的相关性因素的分析,结果表明,苹果树梨树腐烂病的发生程度与果树大小年、树龄、果树生长状况、冻害的发生、土壤管理制度、修剪程度等都有十分密切的相关性:树龄1～10a的发病轻,20a以上的发病重;枝条发育不充实,不能自然落叶的果园发病重,枝条充分成熟的树体发病轻;易遭冻害的果园发病重;清耕不间作的果园发病重,间作的发病轻;重修剪的发病重,轻修剪的发病轻。 相似文献
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本文采用优化综合评价系数法,对北京市密云县东关大队杏园主栽品种串枝红杏,在不同修剪强度下的幼树1a生枝修剪反应进行了综合分析研究。研究表明:在品种、年龄、环境、管理等条件一定的情况下,根据同一类枝条的基部粗度确定修剪量,可以比较合理地调节幼树主、侧延长枝与结果枝之间的关系,使树体生长旺盛,并能培养出足够数量的短果枝,为幼树的早期丰产及稳产打下基础。 相似文献
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A water deficit during stage III of fruit growth was established with the aim of determining if it is possible to achieve an improvement in tree water status by summer pruning and fruit thinning. The experiment was set up as a randomized block split-plot design across trials (irrigation) where pruning was assigned to the main plot and fruit thinning to the sub-plots. The irrigation treatments were (1) standard full irrigation (FI), and (2) suppression of irrigation during stage III of fruit growth until leaves visibly withered (LWI); the pruning treatments were (1) experimental summer pruning (EP), and (2) standard summer pruning (CP); and three fruit thinning intensities were applied to facilitate analysis of the effects of the treatments in relation to fruit load. Changes in amount of light intercepted and in tree stem water potential (Psi stem) were evaluated. The EP treatment reduced the amount of light intercepted by the tree. In the FI treatment, there was a significant reduction in fruit growth measured as both water accumulation and dry mass accumulation. Under FI conditions, reductions in fruit load as a result of EP were not accompanied by a significant improvement in Psi stem. In the LWI treatment, EP produced a significant improvement of 0.17 MPa in Psi stem, but there was no improvement in fruit growth compared with CP trees. A reduction in fruit load from 350 (commercial load) to 150 per tree significantly improved Psi stem by 0.3 MPa at the end of stage III of fruit growth. These results indicate that improvements in water status in response to pruning may be insufficient to promote fruit growth if the pruned trees are unable to provide an adequate supply of assimilates to the developing fruits. 相似文献
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叙述了葡萄避雨栽培简易大棚的结构和双十字V形整枝技术；采用石灰氮处理并在1月中、下旬的覆膜技术，打破葡萄的休眠期，促使提早萌芽结果，同时通过棚内光照、温度、湿度的调节，结合施肥，整形修剪等配套技术，达到葡萄的优质、稳产、高产。 相似文献