期刊名称：Akademos: Revista de Ştiinţă, Inovare, Cultură şi Artă
印刷版ISSN：1857-0461
出版年度：2017
卷号：44
期号：1
页码：68
出版社：Academy of Sciences of Moldova
摘要：The use of water from local sources (inland rivers, lakes, ponds) at irrigation raises diffi cult issues becauseof its improper chemical composition and quality indicators. The irrigation of molic gray soil with water from pond withhigh content of magnesium leads to neutralization of actual and hydrolytic reaction, modifi cation of ratio of cationsin the soil solution, contribute to the substitution of exchangeable Ca 2+ and accumulation of Mg 2+ in the adsorptioncomplex. These processes favor adsorption of Na+, thereby intensifying secondary sodiumisation of soil. There wereregistered negative changes in the composition of humus, which refers to the decrease of the ratio between humic andfulvic acids, but also to a signifi cant decrease of content of the fraction of humic acids associated with calcium. Use of”magnesium” water modifi es the content and composition of soluble salts.
关键词：gray soil; base of exchange; soluble salts; humus; decalcifi cation; sodiumisation; water quality for irrigation.
