土壤沉积物样品中有机碳含量的快速测定

采用微波密闭消解样品的方法来测定土壤／沉积物中有机碳的含量。与重铬酸钾氧化法的结果相比，微波消化法具有操作简单、污染小、快速准确的优点。经F检验法及t检验法检验，两种方法的分析结果无明显差异。     

Sustainable agriculture evaluation model for red soil hill region of southeast China

Agricultural sustainability for economic development is important and a complex issue throughout the world; however,it is difficult to synthetically evaluate its use in the policy making process. The objective of this study was to evaluate sustainable agriculture in the red soil hill region of Southeast China through a newly proposed method combining four separate sub-systems: regional population (P), resource (R), environmental (E), and socio-economic (S). This new index system was proposed to appraise synthetically the agricultural sustainability of the red soil hill region from 1988 to 1996 with a two-step method assessing: a) the agricultural sustainability in each province independently and b) the relative sustainability of each province to the whole region. The first step only provided a development trend for each province based on its original situation, while the second step provided additional information on the comparative status of each province in agricultural development to the region as a whole. Higher index scores were found for the economy and resource categories denoting improvement. However, lower scores in the environment category indicated the improvement was achieved at the cost of deteriorating ecological surroundings due to an increasing population that demanded more from the agro-ecosystem and put heavier pressures on it. Results also showed that water and soil losses in this region were the major obstacles encountered in sustainable agriculture development. The assessment results were verified when compared with results from another method. This suggested that the new assessment system was reliable and credible in evaluating agricultural sustainability on a regional scale.     

禽流感来袭 专家建议消费保洁蛋

日前,贵州禽流感患者死亡的消息,引发社会关注。春季是禽流感等病情高发期,如何防止"病从口入"、安全消费人们生活营养必需的蛋品呢?调查显示,目前我国市场上销售的鸡蛋大都是没有经过处理的"脏蛋",存在巨大的安全隐患。据中国家禽业协会常务理事李朝国研究员介绍,"脏蛋"的表面可能沾染鸡粪等污染物,禽流感病毒、沙门氏菌、大肠杆菌等可能通过蛋壳表面的残留物进行传播,危     

六种鱼类污染物中毒的肉眼判断

鱼类死亡可能是由病害、缺氧、毒藻、机械损伤、污染中毒等多方面原因引起的,而污染中毒是常见的一类致死原因。下面介绍几种常见污染中毒的肉眼判断方法,供在生产中参考。     

具有阶段结构自食捕食系统的持久性与稳定性

研究了一种具有阶段结构自食捕食系统持久性与稳定性.利用比较原理证明了系统在适当条件下是一致持久的,通过构造Lyapunov函数得到系统的全局稳定性.     

信息荟萃

江苏推行农民工实名制管理江苏省将力争用两年左右的时间,对房建、市政、装饰、园林、轨道交通等工程的500多万"建筑大军",实行"实名制"管理,即向民工统一发放类似南京"市民卡"的社保卡,在当地享受各种社会保障、公交刷卡、公园门票等市民待遇。南京已实行建筑领域施工作业人     

巴中市114家规模养殖场年底实现废弃物资源化利用

四川省巴中市巴州万绿养殖场、南江县隆兴养殖有限公司、通江县巴山生态牧业科技有限公司、平昌县富强猪业有限公司等59家规模养殖场被纳入2013年规模化畜禽养殖场主要污染物总量减排治理项目，配套建设固体废物和废水贮存处理设施，实现废弃物资源化利用，其中11家已完成设备安装，48家正在进行土建施工。     

基于微生物共代谢作用去除废水中难降解物质的研究进展

共代谢是微生物特殊的代谢类型,可对废水中难降解有机物进行高效去除,并具有技术经济优势。本文探讨了共代谢的生化机制和特点、共代谢作用的影响因素,同时综述了共代谢作用在国内处理难降解性污染物工艺技术的应用及研究状况,其中,序批式生物膜反应器在处理难降解性污染物方面具有光明的应用前景。     

浅析雾霾天气的成因与危害

雾霾，雾和霾的统称。现在气候变化，环境的污染雾霾天气频繁发生，本文对雾霾天气的成因与危害详细介绍，以供参考。     

一种新型海水虾蟹类养殖水质改良专用微生态制剂研制成功

2012年8月,在江苏省水产三项更新工程项目(PJ2010-51)的支持下,由江苏省海洋水产研究所研发的海水虾蟹类养殖专用微生态水质改良剂研发成功。该技术针对海水虾蟹类养殖水质环境中污染物的特点,筛选出一种对海水养殖水质环境具有良好改良作用的修复菌,并进行了菌种放大工