河西走廊啤酒花钾素适宜用量的研究

田间试验结果表明:在速效K含量112.40 mgkg-1的灌漠土上,啤酒花产量随K素用量增加而增加,但单位K素增产效果则随K素用量增加而递减。经回归统计分析,K素经济效益最佳施肥量为466.00 kghm-2时,干花理论产量为4.52 thm-2,啤酒花收入6.99×104元hm-2,不同处理间差异达到显著和极显著水平。     

河西走廊城市化与城乡协调发展的研究

探讨了河西地区城市化对城乡协调发展的具体影响,并运用一系列城市与经济理论提出了促进城乡协调发展的城市化道路,以指导河西走廊城市化实践。     

Home gardening in Singapore: A feasibility study on the utilization of the vertical space of retrofitted high-rise public housing apartment buildings to increase urban vegetable self-sufficiency

In land-scarce cities, high-rise apartment buildings may provide vertical spaces for natural-light home gardening along corridors, rooftops, balconies as well as façades. The vertical space can improve not only urban environmental sustainability but also food security. Using an experimental approach, we investigated the food production potential of a high-rise public housing apartment building based on different gardening systems, food crops, and sunlight availability. A gardening prototype system for building corridors was shown to increase the unit area yield of corridor gardening by fivefold compared to a commercial trough planter system. Additionally, this commercial trough planter system was mainly for leafy vegetable production, whereas the gardening prototype system for corridors is also suitable for climbing crops, such as legumes and cucurbits. Nevertheless, because of the limited space along corridors of the apartment building and the relatively low-light levels on average, corridor gardening was estimated to meet only 0.5 % of the demand for vegetables of the residents living in the apartment building. Rooftop gardening with shallow growing medium (depth < 15 cm) was estimated to meet 3 % of demand, and façade gardening 43 %, given the larger space available. Although the vegetable production potential in this study was estimated based on a particular typology of public housing apartment buildings in Singapore, our results showed that vegetable production in public housing apartment buildings is feasible, and home gardening can produce a substantial amount of vegetables for consumption if well deployed. Governments of highly urbanized cities may wish to invest in better home garden designs for high-rise public housing apartment buildings and encourage residents’ participation in home gardening, which would increase high-rise greenery coverage and improve urban food system resilience. Future studies should also investigate the environmental sustainability and food safety aspects of home gardening in highly urbanized cities.     

连云港城市森林分布与优化途径

在深入分析连云港城市森林建设条件与现状特征的基础上,揭示城市发展与城市森林格局和结构的相互关系,针对依山临海和"一市双城"的自然人文特征,依据生态网络理论构建连云港城市森林格局,对照国内外相关研究成果提出城市森林布局优化与建设途径。       

白萨福克羊和特克塞尔羊在河西走廊地区适应性比较研究

对引入甘肃省永昌肉用种羊场的白萨福克羊和特克塞尔羊进行了地区适应性比较,包括行为学和抗病能力观察,血液生理生化指标、羊只生长发育和繁殖性能的测定.结果表明:2种羊24 h的活动节律相似,均以反刍时间最长,其次是睡眠时间,再次为采食时间、静立时间和静卧时间.秋季特克塞尔公、母羊的体温、呼吸频率和脉搏都高于白萨福克公、母羊,而白细胞数低于白萨福克公、母羊,其它季节相反.白萨福克羔羊保持快速生长发育的持续期较特克塞尔羔羊长;断奶对特克塞尔母羔的影响最大,白萨福克羔羊从母乳到饲草饲料过渡较好,断奶后适应性要好于特克塞尔羔羊.2种羊引入羊场当年的产羔率均较低,次年恢复正常繁殖性能;但特克塞尔羊连续2 a无双羔.2种羊抗病能力无明显差异,羊只在被引入时存在咳嗽症状,并出现肺炎,治疗后均全愈.     

历史时期河西走廊环境资源保护述略

历史时期,由于不合理的开发导致河西走廊诸多环境问题的产生。在环境问题造成的危害面前,人们对自然的认识进一步加深,关爱自身生存环境的意识不断提高,逐渐摸索出了一些保护环境资源的做法和模式并进行了有益的尝试,在一个时期内对维护走廊生态平衡、改善生存条件、促进经济社会发展发挥了积极的作用。     

干旱区廊道景观及其研究之管见

本文阐述了国内外关于廓道景观的研究进展和研究方法,以及干旱区廓道景观在维持生态安全、改善区域生态环境、发展地区经济方面所具有的重要作用,提出了在利用景观生态学方法研究干旱区生态环境问题中,干旱区廓道景观的研究方向。     

河西走廊水资源特征及其循环转化规律

河西走廊水资源主要以雪冰水资源、地表水资源与地下水资源的形式存在,分布于石羊河、黑河、疏勒河3大相对独立的流域水系.南部祁连山区发育大小河流共计57条,多年平均出山径流量71.29×108 m3,总体而言,近50 a出山径流变化比较稳定.走廊平原主要由8个大型的构造地貌盆地组成,盆地地下水主要接受出山河水及引灌河水的入渗补给,是地表水资源的重复表现形式,多年平均地下水补给量为42.42×108 m3.近50 a来,地下水补给量减少了17.19×108 m3,由此引起泉水资源23 a来衰减了24.6%.受构造地貌的制约,自南部山区至北部盆地,地下水与河水之间经过5个不同地带有规律的、大数量的、重复的转化过程,形成完整统一的"山区地下水-地表水-南盆地地下水-地表水(泉水)-北盆地地下水"水资源循环系统.     

保护祁连山水资源,稳定河西生态平衡

甘肃河西地区地处欧亚大陆腹地,气候极端干燥,年平均降水量约40—200mm。水源缺乏,农、林、牧生态系统十分脆弱。雪线与冰川后退,总经流减少11.77%,泉水减少17.8%。祁连山森林遭受破坏,森林面积减少16.5%,因此,恢复与稳定河西生态系统是发展河西工农业生产,改善人民生活环境的首要战略任务。主要措施是:防止雪线和冰川后退,保护和扩大祁连山水源涵养林,大力营造绿洲农田防护林,保护和封育荒漠天然植被,改善现有水利设施,加强水利工程建设,减少水份的散失量、提高水资源的合理利用率。     

河西走廊及其邻近地区的景观生态格局

为了给河西地区的山地—绿洲—荒漠生态系统耦合作用和农、林、草、畜优化模式的研究提供基本数据。本文在地面考察与遥感解译的基础上 ,划分了 6大类和 1 8个景观类型。运用景观多样性、优势度、均匀度、丰富度、破碎度等项指标 ,分析了河西地区的景观生态格局。阐述了景观生态异质性与草地、土地资源配置原则 ,提出了改变单一经营传统 ,寻求资源互补和产业化的途径。