为了综述狂犬病暴露前免疫的安全性和免疫原性(包括加速程序、与其他疫苗和增强剂的联合应用)、其成本效益和使用建议。在PubMed、Centre for Agriculture and Biosciences International、Cochrane Library、Web of Science databases...
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为了综述狂犬病暴露前免疫的安全性和免疫原性(包括加速程序、与其他疫苗和增强剂的联合应用)、其成本效益和使用建议。在PubMed、Centre for Agriculture and Biosciences International、Cochrane Library、Web of Science databases检索2007年至2016年1月29日期间发表的关于狂犬病暴露前免疫的论文,回顾在秘鲁和菲律宾开展的暴露前免疫运动的现场数据。
ecosystem services,defined as benefits provided by ecosystem functioning to society,areessential to human *** to global environmental change and related anthropogenic drivers,ecosystems are often degraded,which hinde...
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ecosystem services,defined as benefits provided by ecosystem functioning to society,are essential to human *** to global environmental change and related anthropogenic drivers,ecosystems are often degraded,which hinders the delivery of ecosystem *** study aims to quantify the impacts of land use and climate change on two regulating ecosystem services-carbon sequestration and water purification in terms of nitrogen retention in the Czech *** employing approaches of scenarios and modeling,we illustrate current and potential future status of these ecosystem *** results show that among the ecosystem change drivers,one of the dominant domestic land-use change of ALARM BAMBU(Business-As Might Be Usual)scenario is change of arable land and grassland to forest area that increases by 4.5%in 2080 compared to *** results of ecosystem service modeling based on BAMBU scenario for the years 2050 and 2080 indicate that the highest yearly carbon sequestration rate occurred in 2000-2050,reaching 640 GgC·yr^(−1),2000-2080 shows decline in this regulating service by 16%.Average nitro-gen leaching to water streams reached 0.75 kgN·ha^(−1)·yr^(−1)for BAMBU in 2050 scenario and 0.80 kgN·ha^(−1)·yr^(−1)for BAMBU in 2080 scenario as a result of decreasing nitrogen load,which suggested a decrease in nitrogen pollution compared to *** ecosystem services have not been extensively mainstreamed into research and policies in eastern european countries,we aim to contribute to improvement of knowledge on current status and potential future pathways of the provision of regulating ecosystem services in the Czech Republic.
Intensity of tillage practices can enhance organic matter decomposition, increasing CO2 emissions from soil to the atmosphere. Conservation tillage (CT) has been proposed as a means of counteracting potential damage...
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Intensity of tillage practices can enhance organic matter decomposition, increasing CO2 emissions from soil to the atmosphere. Conservation tillage (CT) has been proposed as a means of counteracting potential damages to the environment. In this study the effects of two CT systems, reduced tillage in a long-term experiment (rtl) and no-tillage in a short-term experiment (NTs), were compared to traditional tillage (TT) in the long (TTL) and short-term experiments (TTs). CO2 fluxes, total soil organic carbon (SOC) and dehydrogenase activity (DHA) were evaluated at 0-5, 5-10 and 10-15 cm depths throughout the three years studied (Oct. 2006 Jul. 2009). Traditional tillage increased C02 emissions compared to CT. The CT treatments (rtl and NTs) accumulated more SOC in the surface layer (0 5 cm) than the TT treatments (TTL and TTs). SOC accumulation was moderate but DHA consistently increased in CT in the surface soil, especially with a legume crop included in the crop rotation. Values of stratification ratio of all parameters studied were higher in the CT treatments (rtl and NTs). The agricultural and environmental benefits derived from CT make this system recommendable for semi-arid Mediterranean rain-fed agriculture.
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