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201.
企业层面开展循环经济试点 2002年,泰兴市率先在企业层面开展循环经济试点工作.经过几年的努力,泰兴的企业在大幅度提升经济和社会效益的同时,环境效益也显著提高. 相似文献
202.
Gao Shuai Li Changsuo Jia Chao Zhang Hailin Guan Qin Wu Xiancang Wang Jinxiao Lv Minghui 《Environmental science and pollution research international》2020,27(9):9274-9287
Environmental Science and Pollution Research - Nitrate pollution in rivers, lakes, shallow groundwater, and even deep groundwater occurs in many parts of the world. And, it’s essential to... 相似文献
203.
204.
城市环境承载力分析与评估——以湛江市为例 总被引:1,自引:0,他引:1
介绍了环境承载力的涵义以及城市环境承载力的评估方法,以PSR模型研究环境压力所对应的环境状态,以此评估城市环境承载状态,并以湛江市为对象,展开城市环境承载力的现状分析,在此基础上对未来不同发展阶段的环境承载力做情景分析,从减压—改善—优化层次上提出湛江市环境承载力提升的对策建议。 相似文献
205.
企业环境责任评价体系及成果应用分析 总被引:1,自引:0,他引:1
随着环境保护部近年来众多环保举措的提出,企业的环境责任研究引起了学者和相关政府机构的重视。企业环境责任评价有利于提高企业环保意识和规范企业的环境行为,但目前仍缺乏相关机构对企业环境责任评价体系的独立研究和实践。本文通过对国内外企业环境责任的研究现状进行分析,引入了企业环境责任评价的必要性;在相关概念界定的基础上构建了企业环境责任评价指标体系,最后对评价成果的应用进行了探讨和研究。 相似文献
206.
207.
In this study, we compared ecological characteristics of wetland vegetation in a series of restoration projects that were
carried out in the wetlands of Yellow River Delta. The investigated characteristics include plant composition structure, species
diversity and community similarity in three kinds of Phragmites australis wetlands, i.e. restored P. australis wetlands (R1, R2, R3 and R4: restored in 2002, 2005, 2007 and 2009, respectively), natural P. australis wetland (N) and degraded P. australis wetland (D) to assess the process of wetlands restoration. The coverage of the R1 was 99%, which was similar to natural wetland.
Among all studied wetlands, the highest and lowest stem density was observed in R1 and R2, respectively, Plant height and
stem diameter show the same trend as N > R2 > R1 > R3 > D > R4. Species diversity of restored P. australis wetlands became closed to natural wetland. Both species richness and Shannon–Wiener index had similar tendency: increased
first and then decreased with restored time. The highest species richness and species diversity were observed in R2, while
the lowest values of those parameters were found in natural P. australis wetland. Similarity indexes between restored wetlands and natural wetland increased with the restoration time, but they were
still less than 50%. The results indicate that the vegetation of P. australis wetlands has experienced a great improvement after several years’ restoration, and it is feasible to restored degraded P. australis wetlands by pouring fresh water into those wetlands in the Yellow River Delta. However, it is notable that costal degraded
P. australis wetland in this region may take years to decades to reach the status of natural wetland. 相似文献
208.
官金华 《中国环境管理干部学院学报》2012,(6):81-84
2009年,财政部拟定了新《高等学校会计制励(征求意见稿),要求核算能提供预算管理需要的预算收支信息,增加了与公共财政改革相关的会计核算内容,但高校会计制度(征求意见稿)与公共财政体制依然存在着衔接不当问题。从公共财政体制改革对高校会计的影响出发,解读了高校会计制度(征求意见稿)与财政改革的衔接性,分析了高校会计实务中存在的与公共财政改革不协调的问题,并提出了相应的解决措施。 相似文献
209.
Cu fractions, mobility and bioavailability in soil-wheat system after Cu-enriched livestock manure applications 总被引:4,自引:0,他引:4
Fertilization of crops with livestock manure (LM) is a common waste disposal option, but repeated application of LM containing high concentrations of heavy metals such as Cu could lead to crop toxicity and environmental risk. To examine the Cu availability and uptake by wheat in a Mollisol affected by Cu-enriched LM, pot experiments were conducted. LM (376 mg kg−1 Cu originally) was spiked with different concentrations of Cu (0, 100, 200, 400, 600 and 800 mg kg−1 soil, added as CuSO4) to simulate soil Cu contamination by LM application. The results indicated that Cu was predominately distributed in organic bound fraction, while the most drastic increase was found in reducible fraction. Acid-extractable fraction played a more important role than other fractions in controlling the mobility and bioavailability of Cu. DTPA-extractable Cu may overestimate the Cu bioavailability since DTPA solution could extract soluble and part of stable forms. The application of LM at 1% level significantly decline the Cu mobility, but that at 3% level exhibited the opposite effect.Although the quantities of Cu in wheat was very low compared with the accumulation in soil, Cu concentrations in roots increased evidently from 12 to 533 mg kg−1 and that in aerial parts were in a narrow range from 12.1 to 32.7 mg kg−1, indicating the more sensitivity of roots to the Cu toxicity. The Cu concentrations in grains after 3% manure application did not approach the threshold for Cu toxicity (<20 mg kg−1) even at higher Cu addition rates. 相似文献
210.