Cultivation of sorts and hybrids of sweet corn as the main crop in Karakalpakstan

The aim of the study was to determine the growth, development and yield of sweet corn varieties and hybrids as vegetables during the soil-climatic conditions of Karakalpakstan. Methods. The 8 cultivars and 8 hybrids studied were evaluated for growth, development and yield in Karakalpakstan in 2017-2019. Selection work was carried out on varieties and hybrids. Varieties and hybrids with a positive result based on the selection results were recommended for use in subsequent experiments. Results. After sowing the seeds of the studied 8 varieties and 8 hybrids of vegetable (sweet) corn, the duration of the germination period was 7-9 days. Relatively early germination between cultivars and hybrids Zamin, Can. Pedro 2 Inta, Berys varieties, relatively late germination was recorded in 9 days in SPV 1022, Leonard's Early, Honey Bontam F1, Spirit F1, Megaton F1, Baron F1, Soyan F1, Hybrid F1. It has been established that the period from germination to the stage of leaf formation (7 leaves) is 13-16 days, the period from the stage of leaf formation (7 leaves)to the panicle formation is 23-33 days, the period from the panicle formation to flowering is 4-6 days, the period from flowering to the cob formation is 9-15 days. In the studied varieties and hybrids, the period from the cob formation to milky ripeness was 13-18 days, from milky ripeness to waxy ripeness lasted up to 4-8 days.The study of the duration of the development phases of varieties and hybrids showed that the growth period from germination to milky-wax ripeness is 75-85 days. Early yield was observed in hybrids Baron F1, Sweet star F1, Spirit F1, Soyan F1, vegetation period 73-77 days, relatively early yield was observed in varieties and hybrids Zamin, Sentinel F1, SPV 1022, Osnova 209, Hybrid F1, Can Pedro 2 Inta, Clx3349ys clause, growing season 79-81 days.The selection of varieties and hybrids most appropriate to the soil and climatic conditions of Karakalpakstan was carried out and recommended for cultivation by farmers and dekhkan farms.