Effects of Different Substrate Composition on Growth of Gesneriaceae Plants

The cultivation experiment was carried out to investigate the effects of different proportions of peat soil, perlite, vermiculite and yellow mud on growth of Gesneriaceae species(Chirita gueilinensis, Sinningia speciosa, Lysionotus pauciflorus, Hemiboea henryi, Aeschynanthus acuminatus, Saintpaulia ionantha). The growth traits of each plant growing in 7 different matrix materials were investigated.The plant height, crown width and chlorophyll content of each plant were measured. The results showed that the best substrate ratio was peat soil∶vermiculite=2∶1for C. gueilinensis, L. pauciflorus and H. henryi; peat soil∶perlite∶vermiculite = 2∶1∶1for S. ionantha; peat soil∶vermiculite∶yellow mud=2∶1∶1 for S. speciosa; peat soil∶perlite∶vermiculite∶yellow mud=2∶1∶1∶1 for A. acuminatus.     

有机废弃物生产园艺基质的研究

以工厂化生产金针菇的菇渣废料为主要原料,以鸡粪、尿素、发酵微生物等为辅料,研究了废弃物菇渣的发酵工艺及发酵后菇渣基质的复配技术,研究结果表明,最佳发酵的温度是50~60℃,最佳水分条件为发酵料含水50%~60%,与菇渣复配的适宜无机基质为蛭石,菇渣与蛭石的体积比为6∶4。     

宣威市紫色土辣椒氮磷钾肥配比试验研究

对紫色土辣椒氮、磷、钾适宜施用量研究表明,紫色土氮磷钾肥对辣椒产量的影响顺序是磷肥〉氮肥〉钾肥。磷是限制辣椒产量的主导因子。在施用菜籽饼肥600kg／hm^2,折N31．2kg／hm^2、P2O5 11.7kg／hm^2、K2O 8．1kg／hm^2的基础上,辣椒产量≥20400kg／hm^2的氮磷钾优化组合施肥范围：N=113．9～204．6kg／hm^2,P2O5=145．9～177．2kg／hm^2,K2O=49．3～153．8kg／hm^2,N：P2O5：K2O=1：0．87～1．28：0．43～0．75。建议氮、磷、钾肥适宜用量为：N159．2kg／hm^2,P2O5 161．5kg／hm^2,K2O 101．5kg／hm^2,N：P2O5：K2O=1：1．01：0．64,辣椒最高产量预测值为21961．5kg／hm^2,施肥利润5417．7元／hm^2,投产比1：5．00。适量的氮、磷、钾营养使得养分比例平衡,有利于增加辣椒收果数,提高鲜椒产量,从而增加效益。     

菊花无土栽培技术研究

采用无土栽培技术,对９０余个品种的２６０余盆菊花进行了营养液配方及基质、栽培方式的试验研究,认为在太原市水质及气候条件下,菊花的无土栽培方式以虹吸式、半液式为宜,营养液配方采用３号配方、１号配方或朱士吾提出的通用配方略加调整。     

沿海混凝土桥墩墩身早期裂缝分析及控制措施

通过对某沿海特大桥混凝土桥墩墩身早期裂缝的分析,查找了材料、施工、设计等方面的原因,并采取一系列措施控制了裂缝的进一步发生与发展,为夏季高温条件下大体积混凝土实体桥墩的施工与裂缝控制提出了成熟可靠的施工方法。     

Review on the roles and effects of growing media on plant performance in green roofs in world climates

Growing media (substrate) is a fundamental part of a green roof, providing water, nutrients and support to plants. However, little research has reviewed how it affects plant performances in different climatic regions. This study aims to analyse published research on green roof growing medium across world’s climate zones. Findings are structured according to Köppen–Geiger climate classification, aiming to investigate the prevalence of research conducted in different climate zones. Results from full-scale studies and laboratory or greenhouse experiments were reviewed. The later were included as they provide systematic knowledge on the effect of individual factors on system performances although cannot provide climate specific information. Studies discussed effects of major substrate components and depths on plant survival and establishment using standard test procedures. Results showed that most research in the subject were in temperate (group C climate classification), continental (group D) and dry climates (group B), respectively. Considerable number of investigations was conducted in controlled laboratory or greenhouse environments. Based on the results, future green roof research and guidelines should consider climate specifications of the region in designing growing medium, depths and attribute of green roof substrates in order to ensure enhanced plant performance. Especially, for more fragile but less investigated dry climate, considerations should be made to tackle heat fluctuations and drought stress by enhancing water holding capacity and thermal isolation of the substrate. To move forward, sustainable building solutions as a part of future urban forms, climate-adaptive green roof systems should be included into future research, practice and guidelines.     

关于SBS改性沥青在旧路改造工程上的设计及施工

在良好的设计配合比和施工条件下,SBS沥青能使沥青路面的耐久性和高温稳定性明显提高。本文将根据施工试验情况,论述SBS改性沥青的施工技术要求。