Biochar, as an organic amendment, could positively change soil properties, especially soil with low organic matter and/or poor structure. Biochar application in sandy soil with low organic matter could be an effective tool for improving hydro-physical parameters of the soil economically and ecologically as well. The effect on bulk density, particle density, porosity, saturated hydraulic conductivity and available water content for plants of two biochar types applied at three different particle sizes in a sandy soil was examined. The results confirmed previous studies, showing decreased bulk density, particle density and saturated hydraulic conductivity and partially increased available water content for plants and porosity. Both biochar type and particle size affected the studied soil hydro-physical parameters. After analysis and comparison of two different types of biochar and three particle sizes, the most effective treatment for sandy soil was proved by the biochar produced from willow with the smallest particle size (<125 µm).

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生物炭粒径和原料类型对沙土水物理性质的影响

生物炭作为一种有机改良剂，可以积极改变土壤性质，特别是有机质低和/或结构差的土壤。生物炭在低有机质沙土中的应用可以成为经济和生态改善土壤水物理参数的有效工具。研究了在沙土中以三种不同粒径施用的两种生物炭类型对植物的堆积密度、颗粒密度、孔隙率、饱和导水率和有效水含量的影响。结果证实了之前的研究，显示堆积密度、颗粒密度和饱和导水率降低，植物有效水含量和孔隙率部分增加。生物炭类型和颗粒尺寸都会影响所研究的土壤水物理参数。经过对两种不同类型的生物炭和三种粒径的分析比较，证明以最小粒径（<125 µm）的柳树生产的生物炭对沙土进行最有效的处理。