Advanced Soil Hydrological Studies in Different Scales for Sustainable Agriculture

Uwe Schindler , Lothar Mueller , Georg von Unold , Frank Eulenstein , Wolfgang Durner , Johann Fank
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引用次数: 1

Abstract

A comprehensive study of interactive processes between soil, water, plant, animal and atmosphere to protect the natural resources requires knowledge of parameters and processes in different scales. Soil hydrological studies in North-East Germany were carried out in different scales, starting with laboratory, lysimeter measurements and in the field. The measurements of soil hydrological properties were executed with the Extended Evaporation Method (EEM) and the HYPROP device. A method for quantifying deep seepage and solute leaching under field conditions was developed, tested and applied at more than 40 soil hydrological field plots in NE Germany. The hypothesis was confirmed that arable land constitutes the main source of deep drainage and groundwater recharge in Northeast Germany. Deep seepage was strongly reduced under forest. For decision support on landscape renovation and land rededication by afforestation in NE Germany the seepage reduction under forest is to be taken into consideration, especially with respect to the conservation or restoration of wetlands in regions with negative climatic water balance. The EEM and the soil hydrological field method so called “virtual lysimeter” have the potential for the improvement of soil hydrological studies in Asia as a whole.

面向可持续农业的不同尺度土壤水文研究进展
要全面研究土壤、水、植物、动物和大气之间的相互作用过程,以保护自然资源,需要了解不同尺度的参数和过程。在德国东北部进行了不同尺度的土壤水文研究,从实验室、渗湿计测量和实地开始。采用扩展蒸发法(EEM)和HYPROP装置对土壤水文特性进行了测量。在德国东北部的40多个土壤水文学样地进行了试验和应用,并开发了一种在现场条件下量化深层渗流和溶质淋滤的方法。结果表明,耕地是德国东北部深层排水和地下水补给的主要来源。林下深层渗流明显减少。在德国东北部,为了支持通过植树造林进行景观改造和土地再奉献的决策,应考虑到森林下的渗水减少,特别是在气候水负平衡地区的湿地保护或恢复方面。EEM和被称为“虚拟渗滤仪”的土壤水文场方法在整个亚洲具有改善土壤水文研究的潜力。
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