Влияние разных посевных сроков на урожайность хлопчатника

Аннотация

Ключевые слова: В условиях Ферганской области хлопчатник сортов Условия, Бухара-8, Султан и С-8290 были посеяны в разные Фергана, сроки (шесть), а при образовании 11-12, 12-13, химия, 13-14 симподиальных ветвей проводилась ручная чеканка урожай, чеканка, хлопчатника. В статье отмечается, что наибольшая хлопок, урожайность была получена при посеве хлопчатника сортов средство, у Бухара-8 в сроки 20-25 апреля, при их чеканке образовались рожай, 12-13 их симподиальных ветвей. рост. It is known that if the basis of any crop is yield, then the main task of any agro- technical measures will be to increase productivity. It should be noted that in the care of cotton, it is possible to achieve higher yields than expected when planting manure, seedling thickness and agronomic measures are carried out by man, if they are carried out in a timely manner. When chasing agronomic measures are taken, the growth of cotton stops, the nutrients from the soil are distributed to the yielding elements, and the yield increases due to the increase in the weight of the pods and their retention in more cotton bushes. In the conditions of Samarkand region, the research conducted by O.Sh. Yuzbashyan F.Х. Xamraev [1-8]. When examining the effect of weeding on the bedding of a cotton plant, it was found that the cause of plant bending is affected by the number of stalks along the plant and their location in the plant. It has been shown that pruning plants is 2-3 times less bent than non-pruning plants and that pruning can be significantly reduced or eliminated by using agronomic techniques that allow the main stem to be strong and the stems to be located below [4]. In this regard, studies have been conducted to study the effect of chasing agronomic measures on cotton yield in late, middle and early cotton varieties depending on different sowing periods. The research was carried out using the manuals “Methods of field experiments with cotton” (1981), “Methods of field experiments” (2007), adopted at UzPITI [1] were analyzed [2]. According to the results of research conducted in the Fergana region for 2017–2019, the highest yield of Bukhara-8 cotton varieties was sown on April 20 for an average of three years. The variant sown on April 25 and pruned on 12-13 harvest branches yielded 35.5 ts/ha, respectively. The lowest yield of seeds in this cotton variety was sown on April 10 and was obtained from the variant with 13-14 yielding branches, which revealed a lower yield of 4.4-3.3 ts/ha compared to the previous variant. In the Sultan cotton variety, the highest yields were obtained from the variants of 12-13 and 11-12 twigs sown on April 20-25, and the average yield over the years was 33.4-33.7 ts/ha. It should be noted that the highest yield in 2018 was obtained when the seed was sown on April 20, while in 2019 the seed was obtained from the variant sown on April 25. This can be explained by the fact that depending on the climatic conditions of the year, high yields can be achieved by stratifying the sowing of seeds. 754 Жамият ва инновациялар – Общество и инновации – Society and innovations Special Issue – 4 (2021) / ISSN 2181-1415 It was also noted that in this cotton variety, when the seeds were sown early, on April 10, the yield was low in all three years of the experiment. In the variant sown on April 10, the yield decreased by 2.8-3.1 ts/ha compared to the variant sown on April 20 and 25 (Fig. 1). Ўртача ҳосил; Бухоро-8 ғўза нави 12-13 ҳосил шохи 20.апр; 36,6 Ўртача ҳосил; Бухоро-8 ғўза нави 12-13 ҳосил шохи 25.апр; 35,5 Ўртача ҳосил; Бухоро-8 ғўза нави 11-12 ҳосил шохи 30.апр; 34,7 Ўртача ҳосил; Султон ғўза нави 12-13 Ўртача ҳ ҳ о о с с и и л л ; ш Бу о х х о и р 1 о 5 - . 8 а п ғў р з ; а 3 н 3 а ,5 ви 13-14 Ўртача ҳосил; Бухоро-8 ғўза навиЎ ртача ҳосил; Султҳоонс иғлўз ша онхаив и2 51.2а-п1р3; 33,7 кимёвий чилпиш 05.май; 33,4 ҳосил шохи 20.апр; 33,4 Ўртача ҳосил; С-8290 ғўза нави 12-13 Ўртача ҳ ҳ о о с с и и л л ; ш Бу о х х о и р 1 о 0 - . 8 а п ғў р з ; а 3 н 2 а ,2 ви 13-14 Ўртача ҳ ҳ о о с с и и л л ш ; С о у х л и т 1 о 5 н . а ғў п з р а ; н 32 а , в 1 и 13-Ў1р4т ача ҳ ҳ о о с с и и л л ш ; С о у х л и т 3 о 0 н . а ғў п з р а ; н 32 а , в 3 и 11-12 ҳосилЎ рштоахчиа ҳ 2ҳ о 5о с .с и аи л пл р ш ;; С о 3- х 28 и ,24 3 9 0 0 . ғ а ў п з р а ; н 3 а 2 в ,0 и 11-12 Ўртача ҳосил; Султон ғўза нави кимёвий чилпиш 05.май; 31,5 Ўртача ҳосил; С-8290 ғўза нави кимёвий Ўртача ҳосил; С-8290 ғўза навчии 1л2п-и13ш 05.май; 31,1 Ўртача ҳосил; Султон ғўза нави 13-14 ҳосил шохи 20.апр; 30,8 ҳосил шохи 10.апр; 30,6 Ўртача ҳосил; С-8290 ғўза нави 13-14 ҳосил шохи 15.апр; 30,2 Ўртача ҳосил; С-8290 ғўза нави 13-14 ҳосил шохи 10.апр; 28,9 Figure 1. Influence of chasing on cotton yield depending on sowing dates in cotton varieties Also, the highest yield of early maturing S-8290 cotton variety was sown on April 25-30, and the yield was 32.4-32.0 ts/ha, respectively, in the variant with pruning on 11-12 branches. The lowest yield of seeds in this cotto