YIELD POTENTIAL OF LENTIL VARIETIES DEPENDS ON AGRICULTURAL TECHNOLOGY ELEMENTS UNDER CLIMATE CHANGE

Abstract

The purpose of the study is to determine the effect of herbicides on the level of weediness of the crop, the leaf surface area and the productivity of the lentil varieties Antonina, Serpanok, Darynka. Field tests were carried out at the experimental field of the Odessa State Agricultural Experimental Station of the Institute of Climate-Oriented Agriculture of the National Academy of Sciences of Ukraine in 2023–2025 in order to improve the elements of agrotechnology for growing lentils in southern Ukraine under climate change. The experimental field is located in the village of Khlibodarske, Odessa district, Odessa region, 46°29′5″ N. lat. 30°35′31″ E. The use of manual weeding is the most effective method for ensuring maximum individual productivity of lentil plants, but also the most costly. To combat segetal vegetation on lentil crops, among the options for applying herbicides, the most effective is the use of a mixture of herbicides Imazamox + Bentazon. To increase the photosynthetic activity of lentil varieties, it is advisable to use mixtures of herbicides Imazamox + Bentazone, which provides a leaf surface area in the flowering phase of 31,9–32,2 thousand m2/ha. The maximum leaf surface area was observed in the Darynka variety during manual weeding: 20,9 thousand m2/ha (branching phase) – 35,8 thousand m2/ha (flowering phase). The maximum yield of lentil seeds of the Darynka variety was obtained in experimental plots where herbicides in the combination of Imazamox + Bentazone and manual weeding were used. On average, over the years of research, when herbicides in the combination of Imazamox + Bentazone were used, the yield index was 2,49 t/ha, which exceeds the control by 0,56 t/ha or 29,11%. The use of the herbicide Imazamox alone increased the yield by 0,24 t/ha or 12,4%, the herbicide Bentazon – by 0,48 t/ha or 24,8%. The maximum yield of seeds of the Darynka variety was observed on the site with manual weeding – 2,55 t/ha, the yield increase – 0,62 t/ha or 32,1%.