ВПЛИВ БАКОВИХ СУМІШЕЙ ҐРУНТОВИХ ГЕРБІЦИДІВ НА АЗОТФІКСУЮЧІ БУЛЬБОЧКИ, ЗАБУР’ЯНЕНІСТЬ ПОСІВІВ І ВРОЖАЙНІСТЬ НУТУ

Abstract

It was found that the studied tank mixtures of modern soil-applied herbicides in chickpea crops did not cause inhibition of plant growth and development. No negative effect of tank mixtures of soil-applied herbicides on the fresh weight of nitrogen-fixing nodules on the chickpea root at pod filling stage was detected. It was found that when using the tank mixture of Tizer, 2.0 l/ha + Advokat, 0.5 l/ha, fresh weight of nitrogen-fixing nodules per chickpea plant (1.36 g) increased the most. In the variant of application of the herbicide mixture of Tizer, 2.0 l/ha + Panda, 3.5 l/ha, a significant increase in the fresh weight of one chickpea plant (by 87 %) was noticed. Precipitation, which fell immediately after the application of tank mixtures of soil-applied herbicides, led to an increase of herbicide efficiency. The phytotoxic effect of the most tank mixtures in chickpea crops was better with respect to dicotyledonous biennial weeds than annual cereals. At the first accounting it was found that the amount of annual cereals and dicotyledonous biennial weeds in chickpea crops was controlled the best by the tank mixture of herbicides Herb 900, 2.0 l/ha + Kapral, 2.0 l/ha (77 and 93 %, respectively), at the second accounting – Tizer, 2.0 l/ha + Panda, 3.5 l/ha (87 and 91 %, respectively). The fresh weight of annual cereals weeds at the end of the chickpea growing season decreased the most with applying the tank mixture Tizer, 2.0 l/ha + Dual Gold 960 EC, 1.6 l/ha (93 %), and dicotyledonous biennial weeds with applying of Tizer, 2.0 l/ha + Panda, 3.5 l/ha (95 %). The total fresh weight of annual cereal and dicotyledonous biennial weeds in chickpea crops decreased in large measure under the influence of phytotoxic effect of the tank mixtures of herbicides Tizer, 2.0 l/ha + Panda, 3.5 l/ha (by 92 %). When applying the combination of herbicides such as Tizer, 2.0 l/ha + Premium Gold, 3.0 l/ha, and Tizer, 2.0 l/ha + Panda, 3.5 l/ha in chickpea crops, the largest grain yield gain was obtained 0.15 and 0.12 t/ha, respectively. Key words: chickpea, soil-applied herbicides, nitrogen-fixing nodules,weeds, yield