东南亚珠芽魔芋多苗接力生长特性及应用前景

以珠芽魔芋人工诱导开花进行规模化无性育种,可将魔芋繁殖系数从1位数提高约330倍;采用催苗技术让种子及叶面球茎提早出苗,可显著延长魔芋生长周期,使魔芋种植周期由3年缩短为1年;魔芋种子1年生长最高膨大率超过5000倍,当年即形成1180g球茎;魔芋叶面球茎最大膨大率超过100倍,两者种植一季魔芋即可用于加工.突破了魔芋繁殖系数低、膨大率低导致种植周期长的双重困局,显著降低了病害风险,大幅度缩短了魔芋种植周期,从而突破魔芋传统种植区域的地理限制,使魔芋总产量超常规增长.     

珠芽魔芋弥勒种——从低产到优质高产作物的希望之星

珠芽魔芋是东南亚地区的特色野生魔芋种,适宜在高温高湿环境生长。以珠芽魔芋人工诱导开花进行规模化无性育种,可将魔芋繁殖系数从1位数提高到约330倍。采用催苗技术让种子及叶面球茎提早出苗,可显著延长魔芋生长周期,使魔芋种植周期由3年缩短为1年,实现当年种植收获商品芋,从而避免魔芋种植过程中种植材料反复休眠的固有特性,可使魔芋从低产作物提升为优质高产作物,显著降低种植风险,使魔芋总量大幅增长,市场推广前景十分广阔。     

珠芽魔芋种子5苗接力生长当年形成商品芋技术

首次提出珠芽魔芋种子具有5苗接力生长的生物学特性。种子能在一个不间断的生长周期中积累最大生物产量,避免魔芋需反复"换头"种植3—4年才能收获商品芋的低产生长模式,使魔芋的膨大系数由块茎的低于10倍提高到种子最高约7000倍,所获地下球茎重量平均达1560g。采用种子种植当年即可获用于加工的商品芋,消除了魔芋种植过程中固有的风险,使魔芋由低产作物变成高产作物,魔芋多糖总量将实现跨越式增长。     

中缅边境地区稀有魔芋品种资源研究初探

生长在中缅边境地区的稀有魔芋品种具有与国内外已报道过的品种迥然不同的繁殖特点。该品种除具有魔芋多糖含量高、分子量大和粘度值高的特点外,还具有地下部分的肉质根（球）;不同的是各枝叶交叉点上生长着可供繁殖的小球茎。这一稀有品种至今尚未见报道。     

信息公开问题成了把柄——中缅莱比塘铜矿项目风波的前前后后

<正>1总投资超过10亿美元的莱比塘铜矿是亚洲最大的湿法炼铜工程,也是中缅合作的一大项目。项目位于缅甸北部实皆省蒙育瓦地区,设计产能10万吨阴极铜/年。莱比塘铜矿原本由加拿大艾芬豪矿业公司经营,但因西方对缅甸的持续制裁,艾芬豪公司最终决定退出。2010年6月3日,在中缅两国总理见证下,该项目产品分成合同正式签署:100%的投资方为中国北方工业集团下属的万宝矿产缅甸铜业有限公司(下称万宝公司),合作方为缅甸军方的     

人才资源向人才资本转变的大市场--中美技术贸易市场

中美两国技术贸易市场开发前景良好,双方具有互补性.只要两国从大局出发,增进交流与合作,它必将是21世纪中美两国的大市场.     

环境保护理念的启示--中瑞合作管理培训赴外考察随感

本文介绍了瑞士等欧洲国家的几个环保理念,提出了当前我国在实施可持续发展、生态保护和环境政策等方面需借鉴和思考的一些问题。     

旅游网站中旅游经历分享行为的影响因素研究--基于感知互动性

以S-O-R理论为框架,结合感知互动性理论与价值理论,构建旅游网站中旅游经历分享行为的研究模型。结果表明:①用户在使用旅游网站过程中的感知互动性正向影响其对该网站信息价值的感知程度、自我呈现的满足程度和社会认同的满足程度。②用户对旅游网站的感知互动性会通过社会认同的满足促进用户的分享行为。③用户对旅游网站的感知互动性会通过信息价值感知和社会认同满足促进用户的分享意愿,而用户的分享意愿正向影响其分享行为。     

旅行社品牌经营中必须注意的几个问题--兼论安徽省旅行社的品牌经营

我国旅行社业正经历着激烈的市场竞争,许多旅行社开始注重打造品牌,但旅行社品牌经营现状令人堪忧.结合安徽省旅行社的实际,剖析了旅行社品牌经营状况,并就品牌经营过程中存在的问题和如何进行品牌经营提出了自己的看法,以期对旅行社经营管理者有一定的借鉴作用.     

论我国自然保护地公众参与制度的困境与出路

2019年6月《关于建立以国家公园为主体的自然保护地体系的指导意见》的颁布,指出自然保护地建设应“探索全民共享机制”,突出了公众参与制度的重要意义.在我国自然保护地建设过程中,公众参与制度虽然得到了较为广泛的关注,但仍面临诸多实践困境.通过分析现阶段自然保护地的立法和实践现状,探析公众参与制度在自然保护地建设中的适用路...     

Diversity of Soil Nematodes in Areas Polluted with Heavy Metals and Polycyclic Aromatic Hydrocarbons (PAHs) in Lanzhou,China

This study investigated the soil nematode community structure along the Yellow River in the Lanzhou area of China, and analyzed the impact of heavy metals (Cd, Pb, Cr, Cu, and Zn) and polycyclic aromatic hydrocarbons (PAHs) on the nematode community. Soil samples from five locations (named A–E), which were chosen for soil analysis, showed significant differences in their heavy metal content (p < 0.01), as well as in the variety of nematodes (up to 41 genera) and families (up to 20) that were present. The different samples also differed significantly in the total PAH content (p < 0.05), as well as the six types of PAH present. Sites A–C showed the most severe contamination with heavy metals and PAHs; these sites had the lowest abundance of fungivores and omnivore/predators, but the proportion of bacteriovores was the highest (p < 0.05). Site E, in contrast, showed only minor pollution with heavy metals and PAHs, and it contained the highest abundance of plant parasites (p < 0.05). Several nematode ecological indicators were found to correlate with concentration of soil pollutants at all the sites tested: the maturity index (MI, in addition to plant parasites), plant parasite index (PPI), ΣMI (including all the soil nematodes), Shannon-Wiener diversity index (H′′), and Wasilewska index (WI). Disturbance to the soil environment was more severe when MI, ΣMI, and H′ values were lower. The results of the study show that the abundance and structure of the soil nematode communities in the sampling locations were strongly influenced by levels of heavy metals and PAHs in the soil. They also show that the diversity index H′ and the maturity index can be valuable tools for assessing the impact of pollutants on nematodes.     

我国工业行业的产业升级与碳排放关系分析

文章首先测算了我国工业各行业近十几年来的碳排放量,并总结了我国工业行业碳排放的特征,进而运用灰色关联度方法分析了我国工业行业碳排放量与产业发展之间的关系。研究结果表明：产业产值与碳排放之间存在着密切联系。通过测算工业各行业单位GDP碳排放量的变化,分析了工业行业产业结构与碳排放的关系,最后文章针对上述研究结果提出了减少碳排放的政策建议,以为我国发展低碳经济服务。     

关于我国城市污水厂延伸污泥处理与处置责任的探讨

城市污水厂在污水处理过程中产生大量污泥物质。其BOD5数量远超过尾水排放的BOD5数量，是后者的数倍之多。目前城市污水厂寻找生污泥直接外运的出路日益困难，污泥出路不畅，经常出现泥满为患的现象。本文探讨延伸城市污水处理厂的职能，使污泥的“生产者”承担起污泥处理和处置的环境责任，激励其全面关注进水有机物的最终无害化，将污泥处理以及最终处置(如土地填埋、焚烧或资源化等)的工程造价、运行费用以及相应的环境影响均纳入城市污水处理厂进行考虑，这样将对我国城市污水厂的环境管理观念带来革命性的变化。     

华北地区汽车拥有量与CO2排放量关系研究

研究了华北地区5省（市、自治区）汽车拥有量和人均CO2排放量现状.采用变异系数分析方法对汽车拥有量和入均CO2排放量各地区差异大小变化趋势进行了分析,采用一元线性回归模型对华北地区未来10年汽车拥有量和人均CO2排放趋势及其地区差异大小变化趋势进行了预测,提出了相关建议,以期为该地区乃至全国经济和环境的和谐发展提供参考.     

Junk-buyers as the linkage between waste sources and redemption depots in urban China: the case of Wuhan

This paper locates junk-buyers in the recycling chain that includes waste source, collection system and end-user. With increasing needs of convenience for recycling at waste sources but disappearing redemption depots in city blocks of China, junk-buyers play a role of linkage between waste sources and redemption depots. It is these door-to-door collectors who make the general public aware of cash value inside recyclable waste. Also, the motivation of getting cash back pushes junk-buyers become immediate suppliers to redemption depots. Without junk-buyers as door-to-door collectors, the current waste recovery system in post-Mao's China would brake down. However, as in other developing countries, the junk-buyer occupation in urban China currently is typically driven by economic incentives, and the door-to-door collection of recyclable waste completely falls into junk-buyer individual business. It is difficult for junk-buyers who mainly come from the countryside to establish stable relations with waste sources for lack of recognition from urban society. The appropriate allocation of individual time and space becomes crucial to conducting the door-to-door activities so as to collecting more recyclables. While the collecting territory as the condition of production is positively reflected by the usual extent of the collecting distance, junk-buyers mostly spend time in finding sellers instead of simply expanding their collecting territory. This is a typical example of the cheapest and lowest skilled labor forces being in relatively unlimited supply in a developing country.     

Determinants of foreign direct investment in the mining sector in Asia: A comparison between China and India

The aim of this paper is to assess the conditions that influence foreign direct investment in the mineral industries of China and India. The paper first surveys literature on the determinants of foreign direct investment to identify key conditions, under which host countries attract mining FDI. It then builds an evaluative framework which allows for comparative analysis. The paper then comparatively evaluates the performance of foreign investment regimes that govern mineral industries in China and India. Its findings show that the overall conditions for foreign mining investment in China and India are not favourable and that substantial policy, regulatory and other changes in both countries need to be made if more investment is to flow.