稀有Ju鲫,大鳞泥鳅——新的七天亚慢性毒性试验材料

讨论了稀有Ｊｕ鲫和大鳞泥鳅作为七天亚慢性毒性试验材料的可行性。依据生长和现存量作为观察指标，测定了铬、铜、锌、镉和五氯酚对稀有Ｊｕ鲫的无可观察效应浓度（ＮＯＥＣ）和最低可观察效应浓度（ＬＯＥＣ），铬和五氯酚对大鳞泥鳅的ＮＯＥＣ和ＬＯＥＣ。铬、铜、锌、镉和五氯酚对稀有Ｊｕ鲫的ＮＯＥＣ分别是２５００，１０，２００，２０，８０μｇ／Ｌ，ＬＯＥＣ分别是５０００，２０，４００，４０，１６０μｇ／Ｌ。铬和五氯     

用植物去除环境污染

本文介绍了去除土壤及地下水中有害物质的一种新方法－用植物去除有害物质，同时对此种方法的优缺点及经济效益进行了具体的分析。     

城市绿化与环境保护

城市绿化是城市建设的重要组成部分，它是一项系统工程．涉及到方方面面的内容。本文就城市绿化中涉及到的环境保护问题进行了阐述，并对如何解决这些问题提出了看法和意见），指出城市绿化应贯穿环境保护思想的观点。     

四方山、达尔滨湖自然保护区植被及植物区系组成

本文论述了四方山、达尔滨湖自然保护区植被生态条件、植被类型、植物类群组成、生活型组成、水分生态类型及区系地理成分等调查成果。     

黄河三角洲贝壳海岛与植物多样性保护

根据1997－1999年调查，查清了黄河三角洲贝壳岛资源状况，研究了其高等植物物种多样性、植被类型、植物区系组成特点，分析了近年来因乱采滥挖贝壳资源对贝壳海岛和植物多样性破坏现状，提出了保护贝壳海岛和和植物多样性的对策与建议。     

Elemental sulfur effects on Pb and Zn uptake by Indian mustard and winter wheat

A pot experiment was conducted to investigate the influence of elemental sulfur to contaminated soil on plant uptake by a heavy metal hyperaccumulator, Indian mustard( Brassica juncea ) and a field crop, winter wheat( Triticum. aestivum). Elemental sulfur(S) with different rates was carried out, they were 0(S0 ), 20(S20 ), 40(S40 ), 80(S80 ), and 160(S160 ) mmol/kg respectively. Extra pots with the same rates of S but without plants were used for soil sampling to monitor pH and CaCl2-extractable heavy metal changes. The results showed that S enhanced phytoextraction of Pb and Zn from contaminated soil. Application S effectively decreased soil pH down to 1.1 as the most at the rate of Sl60. The concentrations of CaCl2-extractable Pb and Zn in soil and uptake of Pb and Zn by the plants were increased with soil pH decreased. A good correlation between CaCl2-extractable Pb/Zn and soil pH was found( Rpb^2 = 0.847 and RZn^2 = 0,991, n = 25). With S application, soil CaCl2-extractable Pb and Zn concentrations, concentration of Pb and Zn in plants and the amount of removal by plant uptake were significanfly higher than those without S. Under the treatment of S160, the highest CaCl2-extmctable Pb and Zn were observed, they were 4.23 mg/kg and 0.40 mg/kg, 2.7 and 2.0 times as that of the control(So ) respectively. At the highest rates of S( Sl~0 ), both Indian mustard and winter wheat reached the highest uptake of Pb and Zn. The highest Pb concentrations in wheat and Indian mustard were 32.8 mg/kg and 537.0 mg/kg, all 1.8 times as that of the control, and the highest Zn concentrations in wheat and Indian mustard were 215.5 mg/kg and 404.0 mg/kg, 2.4 and 2.0 times as that of the control respectively. The highest removals of Pb and Zn from the contaminated soil were 0.41 rag/pot and 0.31 nag/pot by Indian mustard in the treatment of S160 through 50 days growth.     

植物对重金属的抗生和抗性代价

本文就植物对重金属污染的长期适应产生抗性，抗性试验技术及抗性代价几个方面的研究进行了简要论述和初步探讨。     

环境污染与植物抗虫性

环境污染与植物害虫的发生,国内外都有人研究和论述过。然而,环境污染与植物抗虫性的关系却很少有报导。本文就国内外有关这方面研究情况介绍点滴。植物抗虫性的利用是农业防治虫害保护环境的一个重要方向。因此,研究在污染条件下植物抗虫性的变化及其机制,对选育抗污染的植物品种和抗虫性植物品种,以及预测植物害虫的发生都有实际意义。植物抗虫性的研究国内外早在五,六十年代就已经作了大量的工作。美国S.D.Beck和J.B.Maltais等对玉米螟和蚜虫抗性植物的研究指出,植物的抗虫性是综合性的:有     

谈谈指示性植物和大气污染监测

谈谈指示性植物和大气污染监测苍山县环保办李建立人们在运用先进的仪器设备进行污染监测的同时，正广泛地利用绿色植物对大气污染进行监测，因为部分绿色植物对大气环境中有害物质具有很强的敏感性，通常在污染物浓度较低的情况下，受害症状比较显著，对大气环境状况起到...