Yield and return on fertilizer with root and foliar feeding of corn plants

Abstract

The results of the study of the effect of root and foliar nutrition on grain yield of maize hybrids are presented. Field experiments were conducted in 2018-2020 in the zone of sufficient moisture of the Stavropol Territory. Root nutrition of plants was carried out under presowing cultivation (in spring) with ammonium nitrate and nitroammonium phosphate at a dose of 30 kg of active agent. Foliar feeding was applied in the 8-leaf phase with Vuxal Macromix fertilizer at a dose of 2.5 l/ha. Fertilizers were studied on the middle-early hybrid Mashuk 220 MV and the mid-season-ripening Mashuk 355 MV. The highest hybrid grain yield in 2018 was obtained from the leaf application of the Vuxal Makromiks fertilizer at a dose of 2.5 l/ha, the increase relative to the control of the hybrid Mashuk 220 MV was 0.89 t/ha, the hybrid Mashuk 355 MV - 1.44 t/ha. In 2019, the highest hybrid grain yield was obtained from the application of ammonium nitrate phosphate fertilizer at a dose of N30P30K30 under pre-sowing cultivation. The grain yield increase of Mashuk 220 MV hybrid was 0.78 t/ha (11.2%), of Mashuk 355 MV hybrid - 0.90 t/ha (11.7%). In 2020, the highest yield of the grain hybrid Mashuk 220 MV was obtained when feeding the plants through the leaves with the Vuxal Macromix fertilizer at a dose of 2.5 l / ha, the hybrid Mashuk 355 MV when applying ammonium nitrate phosphate fertilizer at a dose of N30 under pre-sowing cultivation, the increase amounted to respectively 0.37 t / ha (8.1%) and 0.29 t / ha (6.6%). On average for 2018-2020, the highest hybrid yields were seen with a 2.5 L/ha application of Vuxal Macromix foliar fertilizer. Increase in grain yield of the hybrid Mashuk 220 MV was 0.60 t / ha (11,0%), the hybrid Mashuk 355 MV - 0.63 t / ha (10,5%). Payback of fertilizers by grain when growing hybrid Mashuk 220 MV was higher in the variant of root feeding of plants by fertilizer Vuxal Macromix 2,5 l/ha, for 1 ruble of costs 0,90 ruble of income was received. When growing the hybrid Mashuk 355 MV with the introduction of ammonium nitrate under pre-sowing cultivation at a dose of N30, 1 ruble of costs received 1.69 rubles of income.