闭幕词

各位前辈、各位代表、各位来宾、女士们、先生们:中国土壤学会第九次全国会员代表大会与第三届海峡两岸土壤肥料学术交流研讨会,经过全体代表和大会全体工作人员共同努力,从1999年10月19日至22日历时四天,在古城南京即将胜利闭幕.请允许我代表八届理事会和全体代表向江苏?..     

开幕词

各位领导、各位代表:中国土壤学会第九次全国会员代表大会现在开幕了!我谨代表第八届理事会,向到会代表、向土壤学界的老前辈、向莅临指导的江苏省人民政府、中国科学院、国家自然科学基金委、江苏省科委、省农林厅、省民政厅、省科协、省农科院、南京农业大学、以及兄弟?..     

中国土壤学会第十次全国代表大会开幕词

<正>各位领导、各位代表、各位来宾和各位朋友: 中国土壤学会第十次全国会员代表大会现在开幕了!我谨代表第九届理事会,向与会代表和各位来宾,向来自台湾和香港的同仁们,向莅临指导的辽宁省和沈阳市的各位领导,表示热烈的欢迎和衷心的感谢! 本次代表大会的主要议程有两个:一是以“土壤科学与农业和环境”为主题的学术交流活动;二是进行表彰和换届选举等会务活动。     

表彰讲话

各位代表、各位来宾,女士们、先生们:中国土壤学会第九次全国会员代表大会及第三届海峡两岸土壤肥料学术交流研讨会就要胜利闭幕了.在第八届理事会工作的四年中,在老一辈土壤学家的关怀和指导下,在曹志洪、毛达如、孙铁珩、朱钟麟、李家康和余让水正副理事长和臧双、万洪?..     

关于授予李保国等四位先生首届“中国土壤学会奖”的决定

<正>中国土壤学会[2004]土会字第006号为促进我国土壤科学事业的发展,鼓励中青年土壤科学工作者勇攀科学高峰,中国土壤学会于2002年九届二次常务理事会上决定设立了“中国土壤学会奖”。经各省(市、自治区)土壤(肥料)学会几个专业(工作)委员会推荐,评审组严格评审,并经2004年5月九届三次理事会以无记名投票方式决定,授予李保国、邵明安、金继运、蔡祖聪等四位先生首届“中国土壤学会奖”。2004年5月11日     

中国土壤学会第十四次全国会员代表大会暨“守护土壤健康，助力高质发展”学术交流研讨会在哈尔滨召开

正2020年9月22-24日,由中国土壤学会主办,黑龙江省土壤肥料学会、黑龙江省农业科学院土壤肥料与环境资源研究所、东北农业大学资源环境学院等单位承办的中国土壤学会第十四次全国会员代表大会暨"守护土壤健康,助力高质发展"学术交流研讨会在黑龙江省哈尔滨市顺利召开。共有来自科研、生产、教学等单位的1200多名代表参加了会议。     

中国土壤学会第十三届理事会工作报告

各位理事,各位会员代表,在中国科协和学会理事会的正确领导下,在挂靠单位中国科学院南京土壤研究所及相关单位和部门的大力支持下,在学会理事和广大会员的共同努力下,过去四年间,中国土壤学会坚持以促进学科发展和为我国农业及生态环境建设服务为宗旨,围绕学会的中心任务,积极开展学术交流、人才举荐、编辑出版和科学普及等活动,不断提高...     

土壤学发展趋势与青年土壤科技工作者的任务

1986年8月中下旬,我有机会到西德汉堡参加了第十三届国际土壤学会。这次会议有82个国家,1500名代表参加。我国代表团有31人,加上已经在西德的14人,共45人参加了这次会议。这是我国出席国际土壤学会会议人数最多的一个代表团。     

中国土壤学会第十二次全国会员代表大会暨第九届海峡两岸土壤肥料学术交流研讨会在成都召开

<正>由中国土壤学会主办,四川省土壤肥料学会、重庆市土壤学会、四川省农业厅、四川农业大学、四川省农业科学院、中国科学院成都山地灾害与环境研究所等单位承办的"中国土壤学会第十二次全国会员代表大会暨第九届海峡两岸土壤肥料学术交流研讨会"于2012年8月20-22日在四川省成都市顺利召开。本次     

中国土壤学会第十二届全国会员代表大会暨第九届海峡两岸土壤肥料学术交流研讨会通知

由中国土壤学会主办,四川省土壤肥料学会、重庆市土壤学会、四川省农业厅、四川农业大学、四川省农业科学院、中国科学院成都山地灾害与环境研究所等单位承办,于2012年8月20日至8月23日在四川省成都市召开中国土壤学会第十二次全国会员代表大会,并同期召开"第九届海峡两岸土壤肥料学术交流研讨会"。     

Distribution of the Metals Lead,Cadmium, Copper,and Zinc in the Top Soil of Cartagena,Spain

This article presents the results of the analysis of the metals lead, cadmium, copper, zinc and aluminum, conducted on a total of 112 soil samples arising from 57 sampling points, distributedthroughout the Cartagena area in southeastern Spain. Both, totalmetal content and soluble fraction (1 M nitric acid medium, exchangeable fraction) were analyzed. Soil samples were taken on the surface of the terrain and at a depth of 35 cm from eachsampling point. For the purposes of this study, sampling points were classified in three groups based on the results of previous research on air pollution in the region: clean areas,contaminated areas and vacant industrial areas. The statisticalanalyses of the results show no significant differences betweenthe surface samples and the 35 cm deep samples from all three areas. Lead, zinc and copper (soluble and total fractions) aresignificantly higher, and pH significantly lower, in the samples coming from the contaminated and vacant industrial areasthan in samples coming from the clean area. Total lead and cadmium are significantly higher in the vacant industrial areas(150 g kg^-1 Pb and 9.3 g kg^-1 Cd) than in the contaminated areas (5.2 g kg^-1 Pb and 2.1 g kg^-1 Cd).Iso-concentration maps have been prepared in order to correlatethe presence of metals with the industrial and mining activities in the region under study. These maps show a clear relationship between human activities and metal concentrationgradients, with peaks corresponding to both active and abandoned industrial and mining facilities.     

Manganese, zinc, boron, and iodine in soils of the northwestern part of the Dagestan foothills

The contents and distribution patterns of Mn, Zn, B, and I in the main soil types of the Dagestan foothills are studied. The soils are well provided with Mn and B and are poorly provided with Zn and I. There is a tendency toward an inverse proportion between the contents of water-soluble and total Mn in all the investigated soils. The correlation coefficients between the contents of B, Zn, and I and the humus content are determined. There is no correlation between the contents of humus and Mn or between the contents of the studied microelements and the soil pH.     

Evaluation of the cytotoxicity, genotoxicity, mutagenicity, and antimutagenicity of propolis from Tucuman, Argentina

This study evaluates the toxic, genotoxic/mutagenic, and antimutagenic effects of propolis extract from Amaicha del Valle, Tucumán, Argentina. The cytotoxicity assays carried out with the lethality test of Artemia salina revealed that the LD50 was around 100 microg/mL. Propolis extracts showed no toxicity to Salmonella typhimurium TA98 and TA100 strains and Allium cepa at concentrations that have antibiotic and antioxidant activities. Otherwise, for the testing doses, neither genotoxicity nor mutagenicity was found in any sample. The propolis extracts were able to inhibit the mutagenesis of isoquinoline (IQ) and 4-nitro o-phenylenediamine (NPD) with ID50 values of 40 and 20 microg/plate, respectively. From this result, the studied propolis may be inferred to contain some chemical compounds capable of inhibiting the mutagenicity of direct-acting and indirect-acting mutagens. A compound isolated from Amaicha del Valle propolis, 2',4'-dihydroxychalcone, showed cytotoxic activity (LC50 values of 0.5 microg/mL) but was not genotoxic or mutagenic. Furthermore, this compound was able to inhibit the mutagenicity of IQ (ID50 values of 1 microg/plate) but was unable to inhibit the mutagenicity of NPD. Our results suggest a potential anticarcinogenic activity of Amaicha del Valle propolis and the chalcone isolated from it.     

Sediment Pollution, Transport, and Abatement Measures in the City Canals of Delft, the Netherlands

This paper presents an overview of a long-term study on sediment pollution in the city canals of Delft, the Netherlands. This pollution was most evident for the inner city canal system, with copper, lead, zinc, and polycyclic aromatic hydrocarbons (PAHs) as main pollutants. Sediments of the outer city canals generally had a much better quality. Pollution levels, mutual correlations, and spatial variations were investigated for the various sediment parameters. Also, heavy metal binding forms onto Delft sediments were assessed with the help of sequential extraction techniques; results were found to be in line with expected preferential physicochemical binding processes. Input of sediments into the Delft inner city canals was shown to be largely driven by busy shipping traffic on the main canal surrounding the inner city. Mass balances for the inner city were used to quantify internal and external pollution sources; 65?C85?% of the heavy metal pollution can be attributed to sources outside the Delft area. As shown by factor and cluster analyses, it is highly probable that these external sources derive from the river Rhine. A gradual improvement of the sediment quality has set in; it is expected that, due to further pollution abatement measures, this improvement will continue over the years to come. With respect to the ship-induced sediment input into the inner city canals, it was estimated that a reduction of ship velocities to <1.5?m/s will bring down the sediment input mentioned above to about 85?%.     

Seasonal patterns of nitrogen,phosphorus, potassium,calcium and magnesium in the leaves of the massachusetts cranberry

Abstract

Leaf samples from cranberry plants in Wareham, Massachusetts were collected during the 1980–82 growing seasons and analysed for N, P, K, Ca and Mg. The seasonal patterns which emerged allowed the proposal of normal ranges for the elements and optimum times for sampling. The foliar nutrient levels obtained were compared to those for cranberries grown in other areas as well as to those for crops which are grown under similar conditions.     

The status of the forest elephant Loxodonta africana cyclotis,Matschie, 1900, in the Gola Forest reserves,Sierra Leone

From March until December 1982 a survey of elephants Loxodonta africana cyclotis in the Gold Forest complex, Sierra Leone, was carried out. The aim of the study was to deterine the density and the home ranges of the elephant population in the Gola Forest Reserves. There are two separate populations, in Gola North and in Gola East. In Gola North the mean density was estimated to be 0·1 km⁻², in Gola East 0·27 km⁻². The size of the home range in Gola North was 8500 ha in the dry season and 21 000 ha in the wet season; the home range in Gola East covered 13 000 ha in the dry season and 29 000 ha in the wet season. The results are compared with those of other forest elephant areas in West Africa.     

Improving the physical properties of soil from the Biancana Badlands, Tuscany, Italy, by use of amendment materials

Abstract. Weakly weathered clay bedrock and samples of A horizon of a developed Biancana soil were incubated with compost or green manure in the presence of two physical forms of gypsum: one mined and ground and the other from flue-gas desulphurization (FGDG). The gypsum efficiency was evaluated in combination with two organic polymers: polyvinyl alcohol (PVA) and polyacrylamide. Compost and green manure increased permeability only in the presence of gypsum. The FGDG was more effective than the mined gypsum, alone or in combination with PVA.     

Origins of Sediment-Associated Contaminants to the Marais Vernier, the Seine Estuary, France

The Marais Vernier is the largest freshwater wetland in the Seine Estuary in northern France. It is in a heavily urbanized and industrialized region and could be affected by atmospheric deposition and by fluvial input of contaminants in water diverted from the Seine River. To evaluate contaminant histories in the wetland and the region, sediment cores were collected from two open-water ponds in the Marais Vernier: the Grand-Mare, which was connected to the Seine by a canal from 1950 to 1996, and the Petite Mare, which has a small rural watershed. Diversions from the Seine to the Grand-Mare increased sedimentation rates but mostly resulted in low contaminant concentrations and loading rates, indicating that the sediment from the Seine was predominantly brought upstream by tidal currents from the estuary and was not from the watershed. Atmospheric sources of metals dominate inputs to the Petite Mare; however, runoff of metals from vehicle-related sources in the watershed might contribute to the upward trends in concentrations of Cr, Cu, and Zn. Estimates of atmospheric deposition using the Petite Mare core are consistent with measured deposition in the region and are mixed (similar for Hg and Pb; larger for Cd, Cu, and Zn) compared with deposition estimated from sediment cores in the northeastern United States. A local source of PAHs in the watershed of the Petite Mare is indicated by higher concentrations, higher accumulation rates, and a different, more petrogenic, PAH assemblage than in the Grand-Mare. The study illustrates how diverse sources and transport pathways can affect wetlands in industrial regions and can be evaluated using sediment cores from the wetland ponds.