DFG Trilateral collaboration Deutschland-Israel-Palestine: Irrigation with municipal effluents: effects on physical soil properties, contaminant transport, soil carbon dynamics, soil microbial activity and crop quality

DFG 三边合作 德国-以色列-巴勒斯坦：城市污水灌溉：对土壤物理性质、污染物迁移、土壤碳动态、土壤微生物活动和作物质量的影响

• 批准号: 54698241
• 负责人: Professor Dr. Bernd Marschner
• 金额: --
• 依托单位: Geographisches Institut
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/54698241?language=en
• 关键词: DFG; Trilateral; collaboration; Deutschland; Israel

Treated wastewater (TWW) is used since more than 45 years for irrigating crops in Israel. For sustainable agriculture and environmental conservation the input of organic matter, salts, nutrients and heavy metals with the TWW as well as the processes developing in the soil have to be considered and evaluated. In the first phase of this Trilateral project relevant information was gained about processes in irrigated soils concerning nutrient and heavy metal transport and plant uptake, soil hydrophobicity, soil aggregation, fungi, enzymes and microbial activity. It was shown with field and greenhouse experiments that the uptake of heavy metals into plants is less affected by TWW irrigation than by soil type. Soil microbial activity is enhanced by addition of TWW resulting in altered soil organic matter. In the first phase of the project the field experiment in Gaza was established and run for the duration of 2 years. Furthermore, the cooperation between all the partners was established in several meetings with scientific discussions. The second phase of the Trilateral project will consist of in-depth investigations and continuation of the field experiment. A well-established, unique lysimeter facility running since 2007 with the same setup can be used in the 2nd phase to study the development of hydrophobicity, infiltrability, soil aggregate formation and microbial parameters in soils with different clay content irrigated with four different water qualities. Additional lab experiments will be performed for the investigation of the effect of soil texture, vertical transport of nutrients and development of soil water repedency. The biological stability of organic matter will be studied with priming effect experiments, enzyme profiling and in situ visualization with special focus on the hydrophobic soil surface and deeper soil horizons. The integrative analysis of the results will provide new insights into the interactions between element fluxes, SOM turnover, biological activity and surface hydrophobicity in TWW irrigated soils.

自45年以上用于以色列灌溉农作物以来，使用了处理过的废水（TWW）。对于可持续的农业和环境保护，必须考虑和评估有机物，盐，养分和重金属以及土壤中发展过程的输入。在这个三边项目的第一阶段，有关灌溉土壤中有关养分和重金属运输以及植物吸收，土壤疏水性，土壤聚集，真菌，酶和微生物活性的过程的过程获得了相关信息。通过田间和温室实验表明，重金属对植物的摄取比灌溉的影响少于土壤类型。通过添加TWW，可以增强土壤微生物活性，从而改变土壤有机物。在该项目的第一阶段，建立了加沙的现场实验，并在2年的时间内运行。此外，所有合作伙伴之间的合作是在多次科学讨论的会议上建立的。三边项目的第二阶段将包括深入研究和持续实验实验。自2007年以来，可以在第二阶段使用良好的，独特的溶液仪设施，以研究疏水性，不利性，土壤骨料形成和微生物参数的发展，这些土壤中粘土含量不同的土壤中有四种不同的水质灌溉。将进行其他实验实验，以研究土壤质地的影响，养分的垂直运输和土壤水位的发展。有机物的生物稳定性将通过启动效应实验，酶分析和原位可视化研究，特别关注疏水性土壤表面和更深的土壤层。对结果的综合分析将为TWW灌溉土壤中元素通量，SOM转换，生物活性和表面疏水性之间的相互作用提供新的见解。