AGROCHEMICAL PROPERTIES OF SVETLO-KASHTANOVYYE SOILS OF AGRICULTURAL LANDS IN THE SEMI-DESERT ZONE

Gulin Alexander V.  -  Ph. D. (Agriculture), Director, All-Russian Research Institute of irrigated vegetable and melon growing – branch of the FSBSI "Caspian Agrarian Federal Center of the Russian Academy of Sciences", Russia, 416341, Astrakhan region, Kamyzyak, Lyubicha Str., 16 , vniiob@mail.ru

Yakovleva Lyudmila V.  -  D. Sc. (Biology), Associate Professor, Head of the Department of biotechnology, aquaculture, soil science and land management, Federal State Budgetary Educational Institution of Higher Education “Astrakhan State University name after V.N. Tatishchev”, Russia, 414000, Astrakhan, Shaumyana Sq., 1, yakovleva_lyudmi@mail.ru

Khasanova Amina Khanpashaevna  -  Jr. Researcher at the Laboratory of Biotechnology, Microbiology and Soil Science, Astrakhan State University named after V.N. Tatishchev, Russia, 414056, Astrakhan, Tatishchev str. , 20a,

The article presents the results of studies conducted in the semi-desert zone of the Astrakhan region on light chestnut soils used in agricultural activities. An agrochemical analysis of the soil cover was carried out in three areas: arable land, hayfield and long-term fallow land. It was found that the amount of organic matter in the studied soils under various agricultural uses is very low - from 0.5% to 1.8%. The total reserves of humus in arable soils range from 8.57 t/ha to 20.95 t/ha, in haymaking - from 4.76 t/ha to 26.66 t/ha, in fallow soils from 9.04 t/ha to 31 .41 t/ha. Soils on arable land are characterized by a low supply of mobile compounds phosphorus (37-70 mg/kg) and potassium (156-189 mg/kg). Soils in haymaking and fallow lands have an average supply of mobile phosphorus (89-94 mg/kg) and potassium (176–244 mg/kg).

Key words: svetlo-kashtanovyye soils, Astrakhan region, arable land, hayfield, fallow land, fertility, soil cover