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, Astrakhan State University named by V.N. Tatischev, Russia, 414000, Astrakhan, Shaumyana Str., 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