Manzura Nurullaeva’s research while affiliated with Urgench State University and other places

The article describes the application period and standards of various stimulants on photosynthetic and symbiotic activity of the nontraditional leguminous plant Indigofera (Indigofera tinctoria L.) during its cultivation in the conditions of the meadow alluvial soils of the Khorezm region of the northern are of Republic of Uzbekistan. When Indigofera is applied with Geohumat stimulator for at the rate of 1.0 l/t along with planting and 1.6 l/ha during the 3-4 true leaves and pruning periods of the growing season, the intensity of development increased, and it has been substantiated that the area of the leaf surface in one plant was 3675.0 cm², compared to the control variant without the stimulant was 1286.3 cm²/plant. and 397.5 cm2/plant compared to the variant where Geohumat stimulator was used only with planting, photosynthetic potential has increased up to 92766.0 cm2/plant. In addition, when Geohumat stimulator is applied at acceptable rates along with planting and during the period of 3-4 true leaves of the growing season, up to 70 nodular bacteria are formed in one Indigofera root, and its positive effect on improving soil fertility is explained.

In this article, the influence of the non-traditional legume Crotalaria (Crotalaria juncae L.) as the main crop on its growth, development and productivity in conditions of degraded meadow alluvial soils of Khorezm region is described. That is, the highest indicators of seed germination were observed on May 1-5 of crotalaria in the version where 18 kg/ha of germinating seeds were planted, and increasing the sowing rates in all planting periods increased seed germination by 3-5%; as of July, when crotalaria was planted on April 20-25, the plant height was 10-14 cm higher than the options planted in other periods; in the case of September, when the plant was planted at 14 kg/ha on April 20-25, the number of leaves formed was 265.0, which was 85.0 more than when planted early and 15 more than when planted late, and the number of leaves when 14 kg/ha of seed was planted was 10 85.0 units per kg/ha compared to the variant planted with seeds, 111 units compared to the variant planted with 18 kg/ha; the higher seed yield of crotalaria in 20-25.04 when 14 kg/ha of seed is planted is 18.0 t/ha, compared to the option planted in the early period, 5.9 t/ha; 3.7 ts/ha compared to the option planted in the late period; 2.4 ts/ha compared to the option with 10 kg/ha of seeds; Compared to option 6, where 18 kg/ha of seeds were planted, 4.8 ts/ha of additional grain yield was scientifically justified. Key words: Crotalaria juncae, grassland alluvial soil, legume, duration, rate, fertility, seed, hay, productivity.