西北工业大学金叶信息技术学院中心绿地景观设计     

卿平勇 《中南林业调查规划》2005,24(3):21-24

探讨了西北工业大学金叶信息技术学院中心绿地的景观设计方案,本着生态可持续发展、以人为本和浓郁文化内涵的原则,创造一个以自然景观和人文景观相结合的优美环境,为师生提供具有园林艺术氛围的学习、交流、休闲、娱乐和生活的场所.  相似文献   

Radiation Balance Components of Maize Hybrids Grown at Various Plant Densities     

A. Anda  Z. Løke 《Journal of Agronomy and Crop Science》2005,191(3):202-209

Components of the energy and heat balances were examined in two maize hybrids grown at three different plant densities (40, 70 and 100 thousand plants per hectare). One of the hybrids was drought tolerant, while the other was bred for cultivation under irrigated conditions. An increase in plant density influenced not only the size of the leaf area, but also the distribution of the leaves at various plant heights. The extinction coefficient, which provides a quantification of radiation penetration, was higher in the irrigated treatments. By contrast to the other two treatments, the plant canopy in the thinly sown stands remained open throughout the vegetation period, and thus behaved quite differently to the closed stands, making it impossible to compare them. Smaller albedo values were recorded for the hybrid bred for irrigation and in thinly sown stands. The low plant density allowed more energy to reach the soil, from which it was reflected, making a considerable contribution to the final temperature in the stand. The latent heat, in keeping with the quantity of water transpired, was the greatest in the densely sown stands. There was little difference between the latent heat values of the normal and dense stands in either hybrid, indicating that they both had a similar sensitivity to increased stand density. If sufficient water is available it would appear that the stand density could be increased even for the drought-tolerant hybrid.  相似文献   

论建筑创作整合思维方法及其应用     

张庆余  曾庆淼 《湖南农业大学学报(自然科学版)》2004,(1)

本文针对建筑创作思维方法进行研究 ,提出了研究整合思维方法的目的、意义以及功能 ,论述了以“真、善、美”作为建筑创作的追求目标和应用整合思维方法进行建筑创作应遵循的基本原则  相似文献   

互联网环境下的暖通CAD组件模块的开发方法研究     

张泉  张国强  陈在康 《湖南农业大学学报(自然科学版)》2003,30(5)

针对单机环境下暖通CAD软件重复开发量大、开发周期长等现状，提出了基于互联网环境的三层体系结构及其开发的通用环境，即整个暖通CAD系统被分为不同逻辑块，开发和管理的工作向服务器方转移，从而使分布处理数据成为可能，基于组件的软件开发是互联网环境中应用软件的主要开发方式，以构架为组装蓝图，以可重用组件为组装预制块，支持组装式软件重用，从而克服人力和物力的浪费，进而为了重用暖通CAD已开发出的功能模块，给出组件逆向工程的开发方法、组装流程和组件管理过程。  相似文献   

5个草地型草地牧草的生长速率和养分动态研究     

袁福锦吴文荣  金显栋奎嘉祥 《四川草原》2005,(3):24-27

在牧草生长季节(5~9月)对小哨牧场放牧演替形成的5个草地型草地的牧草进行生长速率、牧草产量及养分的逐月观测,生长速率测定显示,白三叶+东非狼尾草和东非狼尾草+非洲狗尾草两个草地型草地均出现两个生长峰值,分别在6月和9月,其余3个草地型草地只有一个生长高峰。干物质产量和牧草养分测定结果表明,白三叶+东非狼尾草和白三叶+非洲狗尾草+画眉草两种草地型草地表现最好,可以在气候环境条件类似的地区推广种植利用;白三叶+画眉草和白三叶+非洲狗尾草两种草地型草地表现优良,可以在草地改良中,根据当地实际情况选择性地加以种植;东非狼尾草+非洲狗尾草型草地表现较差,不提倡种植。  相似文献   

水分管理方式对香根草生长发育的影响   总被引：6，自引：0，他引：6  

刘金根  卞新民 《中国草地》2005,27(5):42-46

对四种不同的水分管理条件下香根草生长研究发现：香根草最适宜在土壤水分饱和的湿润环境中生长,这时它的成活率最高,分蘖速度最快,植株高度生长也最快,定植后3个月,其对应的根体积、根干生物量、茎叶干生物量和根茎比也最高。  相似文献   

园林布局中必然性和偶然性要素的辩识与运用     

罗志军  杨勇 《四川畜牧兽医学院学报》2005,3(4):165-166

阐释了园林构成要素中的必然性要素和偶然性要素及其相互关系与运用意义；以昆明世博园中“齐鲁园”为例，辩识了“齐鲁园”中必然性与偶然性园林要素，分析了诸要素在特定园林环境布局中的运用。  相似文献   

Systemic spread of Plum pox virus (PPV) in Mariana plum GF 8-1 in relation to shoot growth     

M. Bodin Ferri †  E. Costes  J.-B. Quiot  F. Dosba 《Plant pathology》2002,51(2):142-148

Infection of Prunus spp. by Plum pox virus (PPV) is characterized by an uneven distribution of the virus within the tree and branches. In order to gain a better understanding of this distribution, a method for modelling tree growth was used. PPV spread was followed within susceptible Mariana plum clone GF 8-1 shoots for 4 months after inoculation. Shoot growth was unaffected by the presence of the virus. Symptoms appeared on leaves produced in the most actively growing parts of the shoots, i.e. at the beginning of the season. PPV was detected in leaves other than those showing symptoms. The proportion of leaves with detectable virus decreased from the zone showing symptoms, with 100% ELISA-positive responses, to the shoot tip with no detectable virus in leaves produced between 111 and 127 days after inoculation. Furthermore, a higher proportion of positive ELISA results was obtained below the zone showing symptoms (77%) compared with 50% above. PPV was detected in 95% of the most vigorous shoots 71 days after inoculation compared with 37% of slower-growing, later-produced shoots.  相似文献   

非洲凌霄在广州的栽培及园林应用     

李鹏初 《广东园林》2011,(3):48-50

非洲凌霄(Podranea ricasoliana (Tanf.)Sprague)是紫葳科非洲凌霄属植物，原产非洲南部，近年引入广州栽培，通过近5年试种和繁殖试验，取得较好的效果。文章介绍其形态特征、生态习性、观赏特性、繁殖技术与苗圃栽培，并阐述其在园林中的多种应用方式，为其在广州园林的推广应用提供参考。  相似文献   

四川新津白鹤滩国家湿地公园核心区植物景观配置研究     

郭丽  闫晓俊  唐承华  王秋月  马文静  李佳奇 《现代农业科技》2019,(22)

四川新津白鹤滩国家湿地公园位于成都市新津县境内,是典型的河流漫滩和沙洲地貌。受亚热带湿润气候影响,湿地公园核心区拥有种类丰富的湿地动植物资源,但近几年人们在场地周边的开发活动,对基地原有植物生态环境造成破坏_^[1]。现在核心区仅存那些对水质要求低和抗逆性强的植物,同时也因为植物种类过于单一,随之而来的就是湿地季节性功能失调现象,如对水质净化的能力差,水体富营养化严重。为缓解和改善湿地核心区现存问题,一个具有生态修复功能的植物景观配置就显得尤为重要,本论文主要以生态恢复学、植被演替理论等为理论支撑,借鉴LID技术在湿地生态修复的应用,结合对基地本身植物资源调查的基础,通过对不同植物的配置选择,构建起了多样的新旧植物景观模式,用以探索科学合理的湿地公园植物景观配置模式,以期恢复新津湿地公园植被生态多样性,提升视觉景观效果。  相似文献