Factors of efficient use of water resources during drip irrigation of carrots in the conditions of the Lower Volga region

Abstract

Every year, the volume of imports of vegetables, including table carrots, is growing. The  above  is  the  main  indicator  of  the  existence  of  a  problem  in  providing  the  domestic  market with  domestically  produced  products.  This  is  primarily  due  to  the  amount  of  resources  expended and their high cost, which does not allow domestic producers to meet the population’s need for vegetables. The purpose of the study is to identify the degree of influence of various factors on the efficiency of water resources use during drip irrigation of carrots with the formation of 90-130 t/ha of standard root crops. The experiment was carried out on the territory of the Volgograd region on the fields of the peasant farm of Zaitsev V.A. Three factors are defined in the scheme of the experiment: A – water supply conditions, B – mineral nutrition, C – sowing density. A change in the quantitative indicators of the main crop-forming factors leads to a change in the yield of marketable carrot products. Improved conditions created during the years of research (2019-2021) on variants with the maximum dose of applied nutrients under a regime of differentiated soil moisture of 70-80% HB in a layer of 0.4 m made it possible to obtain the highest yields (up to 114-115 t/ha), however, the lowest consumption of irrigation moisture was noted for each year of research on the variant with maintaining the specified regime in a layer of 0.4 m, applying mineral fertilizers  at  a  dose  of  N210P95K260  and  differentiated  distribution  of  seed  material  in  the  tape,  where the amount of the resulting product reached 105-113 t/ha.