ISSN 2285-5785, ISSN CD-ROM 2285-5793, ISSN ONLINE 2285-5807, ISSN-L 2285-5785


Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 2
Written by Sviatoslav BALIUK, Maryna ZAKHAROVA, Ludmila VOROTYNTSEVA, Tamara LEAH, Vladimir FILIPCIUC

The humus state of irrigated soils in Ukraine is determined mainly by the structure of sown areas, the specific growth of perennial legumes and the level of organic fertilizers application. A deficit-free humus balance is formed in crop rotations with perennial leguminous herbs (more 21-25%) and manure doses of 8-10 t ha-1. When mineralized waters are used for irrigation, a deficit-free humus balance is achieved in crop rotations with alfalfa and organic fertilizers of 12-15 t ha-1. In crop rotations without perennial leguminous grasses, there is a gradual decrease in the humus content from 3-5% in field crop rotations to 11-23% in vegetables. Research conducted in the conditions of the Republic of
Moldova has shown that the use of weakly mineralized water, with a neutral reaction, has no negative consequences on the humus content of the soil. The humus state of soils is determined by the ratio of humic acid: fulvic acid. This integrated criterion, in the irrigation conditions of chernozems with Dniester water, also remains unchanged. Chernozem irrigated with alkaline mineralized water causes essential changes in the fractional composition of humus.

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