Совершенствование технологии возделывания сортов зернового сорго на светло-каштановых почвах приморско-каспийской подпровинции республики Дагестан

Abstract

According to many authors, the main source of replenishment of concentrated, succulent and roughage, along with corn in many irrigated areas of the North Caucasian Federal District, can be sorghum. At the same time, it should be noted that this crop in many regions (including the Republic of Dagestan) has not received proper distribution, due to the lack of high-yielding varieties and insufficient development of cultivation technology elements. In this regard, the study of the comparative productivity of grain sorghum varieties against the background of treatment with various growth regulators, on slightly saline light chestnut soils of the Primorsko-Caspian subprovince of Dagestan, is relevant. The purpose of the research is to study the productivity of grain sorghum varieties depending on the treatment with various growth regulators in the Primorsko-Caspian sub-province of Dagestan. Studies have shown that the highest values of leaf surface area, NPP and dry matter accumulation were observed when treated with growth regulator Megamix (dose 2 l/t) - respectively 48.8 thousand m2/ha, 2.94 g/m2 day and 7, 0 t/ha. The difference with control (treatment with water) was 6.3; 9.3; 11.1%, with the data of the second variant (Mival-agro) - 2.3; 2.4 and 4.5%, and compared with the plots where the treatment was carried out with Albit, respectively 4.3; 5.0 and 9.4%. The maximum photosynthetic activity of the grain sorghum variety was formed with the double application of growth regulators. Against the background of the use of growth regulators Mival-agro and Megamix, the maximum yield data was noted. The varieties Ataman and Velikan formed the highest grain yield.