The influence of priming and growth regulators on the symbiotic activity and yield of narrow-leaved lupine (Lupinus angustifolius)

Abstract

Background and Aim. Legumes have high biological potential and the ability to increase soil fertility, which makes them important for the intensification of agriculture in the Republic of Kazakhstan. Narrow-leaved lupine of the Orlovsky kormovoy variety was chosen as the object of the study due to its high yield and protein content. The purpose of the study is to study the effect of growth regulators on the symbiotic activity and productivity of narrow-leaved lupine in the steppe zone of Northern Kazakhstan.
Materials and methods. The study was conducted at the LLP “North Kazakhstan Agricultural Experimental Station”, soil – ordinary black soil. The effect of priming and growth regulators on symbiotic activity and formation of lupine yield was studied. The biometric parameters of the root system, the number, weight and activity of nodules, the dynamics of dry matter accumulation and the formation of productivity elements were measured.
Results. In 2023, drought conditions reduced the symbiotic activity of the root system, while favorable conditions in 2024 contributed to its increase to medium and high levels. Positive correlations were found between the number and weight of nodules and dry matter accumulation (r=0.71 0.83), as well as between the activity of nodule bacteria and yield (r=0.92). The use of growth regulators and seed priming had a positive effect on the growth and development of lupine plants, the maximum yield in 2023 was 15.9 c/ha and 20.9 c/ha in 2024.

Conclusion. The results of the study show the importance of pre-sowing seed treatment for increasing the symbiotic activity of narrow-leaved lupine, increasing its productivity. The data obtained can be useful for developing pre-sowing preparation methods and agrotechnical techniques to increase the yield of this crop.