Fertilization increases paddy soil organic carbon density

Field experiments provide an opportunity to study the effects of fertilization on soil organic carbon (SOC) sequestration. We sampled soils from a long-term (25 years) paddy experiment in subtropical China. The experiment included eight treatments: (1) check, (2) PK, (3) NP, (4) NK, (5) NPK, (6) 7F:3M (N, P, K inorganic fertilizers+30% organic N), (7) 5F:5M (N, P, K inorganic fertilizers+50% organic N), (8) 3F:7M (N, P, K inorganic fertilizers+70% organic N). Fertilization increased SOC content in the plow layers compared to the non-fertilized check treatment. The SOC density in the top 100 cm of soil ranged from 73.12 to 91.36 Mg/ha. The SOC densities of all fertilizer treatments were greater than that of the check. Those treatments that combined inorganic fertilizers and organic amendments had greater SOC densities than those receiving only inorganic fertilizers. The SOC density was closely correlated to the sum of the soil carbon converted from organic amendments and rice residues. Carbon sequestration in paddy soils could be achieved by balanced and combined fertilization. Fertilization combining both inorganic fertilizers and organic amendments is an effective sustainable practice to sequestrate SOC.     

对冰箱中微生物喜恶情况的研究

冰箱并不是＂保险箱＂,冰箱冷藏仅可用于食品及原料暂时保存,时间稍长便可能招致嗜冷菌的生长繁殖进而导致食品腐败变质而中毒。研究冰箱中微生物生长所需的最佳生长碳源、氮源及初始pH值对防止用冰箱冷藏食品所引起的食品变质提供一定的参考作用。     

轴承钢高拉碳工艺探讨

针对转炉冶炼轴承钢终点高碳、低磷、保温度的工艺要求,优化转炉冶炼工艺,提高转炉终点碳含量,保证终点磷和终点温度控制稳定,实现提高钢水质量,降低生产成本等要求。     

低碳经济的发展理论和实践综述

城市是经济发展和资源消费的主要载体,发展低碳城市是我国转变经济发展方式,实现可持续发展的重要手段之一。低碳经济概念提出后,国内外学者对低碳经济的理论内涵进行深入探索,各国也在积极尝试构建低碳城市,并取得一定成果,本文在低碳经济的理论综述基础上,对国际上发展低碳城市的成功实践进行分析,并对我国构建低碳城市提出建议。     

托柱转换梁结构体系在荷载增加状况下力学性能研究与加固

建筑物由于更换用途荷栽增加,对于托柱转换梁结构体系利用PKPM—SETWE进行力学分析。对于相应梁、板进行粘钢、粘贴碳纤维片材的加固处理,使用过程中通过跟踪检测显示加固效果良好。     

碳纳米管在药物载体领域的应用

医学中开发新型药物载体对研究药物具有重要作用,作为一种具有独特纳米管径与中空结构的碳纳米管,可将其纳入药物载体范畴,以核酸、蛋白、药物分子以及肽所修饰的新型碳纳米管为载体,将生物活性分子运载至细胞中,而且不会产生毒性。本研究主要对碳纳米管在药物载体领域的应用进行分析与探讨。     

The NatCarb Geoportal

ABSTRACT

The Department of Energy (DOE) Carbon Sequestration Regional Partnerships are generating the data for a “carbon atlas” of key geospatial data (carbon sources, potential sinks, etc.) required for rapid implementation of carbon sequestration on a broad scale. The NATional CARBon Sequestration Database and Geographic Information System (NatCarb) provides Web-based, nation-wide data access. Distributed computing solutions link partnerships and other publicly accessible repositories of geological, geophysical, natural resource, infrastructure, and environmental data. Data are maintained and enhanced locally, but assembled and accessed through a single geoportal. NatCarb, as a first attempt at a national carbon cyberinfrastructure (NCCI), assembles the data required to address technical and policy challenges of carbon capture and storage. We present a path forward to design and implement a comprehensive and successful NCCI.     

科技进步、碳排放的演变与中国应对气候变化之策

以气候变暖为主要特征的全球气候变化已成为国际社会关注的焦点问题。科技进步是应对气候变化的核心和关键。文章在揭示科技进步与应对气候变化国际发展趋势的基础上,探讨了科技进步与碳排放演变之间的关系,证明了科技进步驱动下碳排放的演变依次遵循三个“倒 U型”曲线规律,即碳排放强度倒U型曲线、人均碳排放量倒U型曲线和碳排放总量倒U型曲线,并据此提出了中国应对气候变化的对策和建议。     

新疆碳排放、能源消费与经济增长关系的实证研究

利用新疆1978—2013年的样本数据,在环境库兹涅茨曲线基础上,运用VAR模型的广义脉冲响应及Granger检验方法对新疆碳排放、能源消费与经济增长之间的动态关系进行计量研究。研究表明,经济增长是碳排放和能源消费增长的Granger原因,碳排量与能源消耗不是经济增长变化的Granger原因;它们之间呈现不同于经典的EKC理论的"N"型环境兹涅茨曲线。从新疆的实际区情出发,提出从能源消费结构、降低碳排放等方面采取相应的措施,实现新疆经济绿色增长。     

A new direction in search of “missing”carbon sinks

ACAS scientist succeeds in developing a new direction for exploring the inorganic carbon cycle of the earth. His creative work was recently reported by the 20th issue of Chinese Science Bulletin in 2007.