The Effect of the Agro-Master Microfertilizer on the Yield and Quality of Potato Tubers

Abstract. The purpose of the work is to study the influence of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on the photosynthetic productivity of the potatoes of the Barna variety based on the results of field experiments in the forest-steppe zone Republic of North Ossetia-Alania. Methods. Studies on the tasks were carried out in 2018–2020. at the experimental site of the NCRIMFA branch of the VSC of RAS in the conditions of the forest-steppe zone Republic of North Ossetia-Alania according to generally accepted methods. The soil of the experimental plot is medium-power heavy loamy leached chernozem, lined with pebbles. Results. It is established, that biological products under identical soil and weather conditions assisted different progress of plants and approach of phases of vegetation. For all variants of the experiment, the number of stems increased by 0,3–0,7 pcs., the height of the stems of potato plants – by 3,8–4,9 cm in comparison with the control. An intense increase in the mass of tops occurred when using a tank mixture (growth regulator “Regoplant” (25 ml/ha) + microfertilizer “Ultramag Combi” (0,75 l/ha)) – by 74 g/bush, or 15.5 % compared with the control variant. During the growing season, the sum of the photosynthetic potential (FP) was 1,070 thousand m2 •days/ha in the control, and on average 1198–1406 thousand m2•days/ha in the experimental variants. The greatest accumulation of dry matter was noted when using a tank mixture – 917 g/m2. The maximum pure photosynthetic productivity was observed in experimental variant IV – 6,52 g/m2•day compared to the control option. Scientific novelty. For the first time in the forest-steppe zone Republic of North Ossetia-Alania the effect of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on photosynthetic activity of potatoes was studied. Practical significance. The studies carried out make it possible to recommend in potato production the use of a tank mixture of an effective growth regulator “Regoplant” at a dose of 25 ml/ha and microfertilizer “Ultramag Combi” at a dose of 0,75 l/ha, as an ecologically safe and low-cost agricultural method when processing vegetative plants, providing an increase in yield and quality of tubers.

Influence of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on photosynthetic activity of potatoes in the forest-steppe zone Republic of North Ossetia-Alania

Ikoeva¹,

Haeva²

2021

Photosynthetic activity of potatoes depending on the methods of using a growth stimulator in the foothill zone of the Republic of North Ossetia-Alania

Ikoeva¹,

Haeva²

2022

Abstract. The purpose of the work is to study the effect of the growth stimulant “Epin-Extra” on the photosynthetic activity of potato crops of the Nevskiy variety according to the results of field experiments. Methods. The studies of the tasks were carried out on the experimental section of the North Caucasus Research Institute of Mountain and Piedmont Agriculture – branch of the VSC of RAS in the conditions of the foothill zone of the Republic of North Ossetia-Alania according to generally accepted methods during 2019–2021. The soil of the experimental site is medium-powerful heavy loamy leached black earth, underlain by pebbles. Results. The results of the study indicate a positive effect of the use of the growth stimulant “Epin-Extra” in the cultivation of potatoes of the Nevskiy variety in the conditions of the foothill zone of the Republic of North Ossetia-Alania. The drug of the growth stimulant “Epin-Extra” contributes to an increase in the biometric indicators of potatoes: the height of plants by 1.4–3.3 cm, the number of main stems is 0.3–0.7 pcs. per bush compared to the control. It is established, that growth factor “Epin-Extra” strengthens process of formation of the area of leaves and keeps them during vegetation. On all skilled versions the area of leaves above a control version on 8.01; 4.54; 10.7 %, accordingly. The greatest sheet surface is noted at complex use of a growth factor in comparison with other skilled versions, the increase has made 8.2 and 6.0 %. The photosynthetic potential on skilled versions on the average varied from 1.32 up to 1.45 mln m2/ha days, which is 0.11; 0.19; 0.24 mln m2/ha days is more than the control option. The biological preparation “Epin-Extra” has a polyfunctional effect on potato plants. Scientific novelty. For the first time in the foothill zone of the Republic of North Ossetia-Alania it was the effect of the growth stimulator “Epin-Extra” on potato plantings was studied Nevskiy variety. Practical significance. The studies carried out make it possible to recommend the use of an effective growth stimulant “Epin-Extra” in the production of potatoes in the foothill zone in the pre-planting treatment of potatoes at a dose of 10 ml/t and when spraying plant leaves at a dose of 60 ml/ha in the budding phase, as an environmentally safe and low-cost agricultural technique that provides an increase in yield, the quality of potato tubers and resistance to late blight.

Dependence of yield and quality of potato tubers on the action of a growth regulator in the foothill zone of the Republic of North Ossetia-Alania

Ikoeva¹

2023

Abstract. The aim of the work was to study the effect of the growth regulator “Epin-Ekstra” on the yield and quality indicators of potato tubers Nevskiy variety by the results of field experiments. Methods. The studies on the set objectives were carried out of the conditions in the foothill zone of the Republic of North Ossetia-Alania on the experimental section of the North Caucasus Scientific Research Institute of Mountain and Foothill Agriculture – branch of the Federal Center “Vladikavkaz Scientific Center of the Russian Academy of Sciences” on according to generally accepted methods during 2019–2021. The soil of the experimental plot is leached, heavy loam, medium thickness, underlain by pebbles. Results. The results of the study of the yield of potato Nevskiy variety testify to the positive impact of the growth regulator “Epin-Ekstra” in the conditions of the foothill zone of the Republic of North Ossetia-Alania. Pretreatment of tubers with the growth regulator “Epin-Ekstra” (10 ml/t) and treatment of crops by spraying in the phase of budding growth regulator “Epin-Ekstra” (60 ml/ha) contributed to the formation of the highest yield – 29.6 t/ha, 88,0 % marketability, which is 10,3 t/ha more than control, 4.8 t/ha more than in variant II and 6.1 t/ha – variant III. The best qualitative indicators of potato tubers were observed at complex processing: the content of dry matter – 22.2 %, starch – 12.9 %, vitamin C – 10.4 mg%. The lowest nitrate content of 89 mg/kg in tubers of Nevskiy potato variety was observed in the pre-budding treatment of tubers and the treatment of crops in the phase of budding with the growth regulator “Epin-Ekstra”. Calculations of economic efficiency show that the costs are recouped in all variants of the experience. The highest level of profitability 290,8 %. Cancelled at the complex treatment, which is 110,2 % more than the control variant. Scientific novelty. For the first time in the foothill zone of the Republic of North Ossetia-Alania the effect of the growth regulator “Epin-Ekstra” on the yield and quality of tubers of Nevskiy potato variety was studied. Practical significance. The conducted studies allow us to recommend the use of an effective growth stimulant “Epin-Ekstra” in potato preplanting treatment at a dose of 10 ml/t and when spraying the leaves of plants at a dose of 60 ml/ha in the phase of budding, as environmentally safe and low-cost agricultural practices that ensure increased productivity and quality of potato tubers of the conditions in the foothill zone of the Republic of North Ossetia – Alania.