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Book (series)Technical study2010年世界水产养殖 2014
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本书总结了全球水产养殖的状况和发展趋势，回顾了粮农组织2010年对亚太、欧洲、拉丁美洲及加勒比、近东和北非、北美洲和撒哈拉以南非洲区域开展的一系列研究。过去10年中，全球水产养殖鱼类生产获得了大幅增长，水产养殖始终是增长最快的动物源性食品生产领域，目前几乎占到世界食用鱼消费量的一半。10年来，有诸多因素促进了全球水产业的显著增长，包括优化政策、战略、计划和立法并予以实施；实现应用性研究成果的转化；国内和国际新兴市场的出现。要实现全球水产养殖产业长期的经济、社会和环境可持续目标，首要是依靠政府的不懈努力，为该产业创建善治框架并给予支持。令人深受鼓舞的是，过去10年的经验表明，多国政府仍致力于实现善治。随着水产养殖产业的进一步扩展、强大和多样化，应当对相关的环境和社会关切有充分的认识，在科学实证的支持下以透明方式主动解决问题。本书讨论了水产养殖产业的总体特点和趋势，涉及资源、服务和技术需求，环境问题，市场和贸易格局，粮食安全和经济发展问题，信息和培训机遇，以及治理和管理挑战等各个方面。 -
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BookletCorporate general interestStandard operating procedure for soil microbial biomass (carbon): chloroform fumigation-extraction method 2024
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No results found.Microbial biomass is considered as an estimation of soil biological activities and the capacity to mediate soil biochemical reactions. It is the most dynamic and labile of soil organic matter fractions, generally accounting for 1 to 5 percent of soil organic matter and very sensitive to soil management. The need to quantify soil microbiota has become increasingly relevant in current times as they are responsible for many different processes like the degradation of organic matter, the stability of aggregates and most of the nutrient cycling that occurs in soils. This standard operating procedure (SOP) focuses on the determination of soil microbial biomass using the chloroform fumigation-extraction method, which is applicable to both aerobic and anaerobic conditions over the whole range of soil pH, regardless of land use type. While chloroform fumigation also affects soil fauna, the carbon aliquot derived from these organisms is generally small (less than 5 percent) and can usually be disregarded.