Assessment of the use of photosynthetically active radiation by soybean on irrigated lands in Rostov region

Purpose: assessment of the use photosynthetically active radiation (PAR) by soybeans while using improved cultivation technology on irrigated lands in Rostov region. Materials and methods. The studies were carried out at Bessergenevskoe Agricultural Enterprise LLC 2019–2021. laying field experiments soybean crops, recording observations according to methods VNIIMK All-Union Scientific Research Institute soybean. In experiments, following varieties sown: SK Optima, Riana, Selecta 201, 302, Veda. method A. Nichiporovich was used calculate PAR. Indicators solar determined data meteorological station Gigant. Results. As a result research, indicators necessary for calculating capacity utilization (CU, an analogue Efficiency) PAR under conditions region specified: duration vegetation total this period, core product yield by-products biomass, ratio seed by-products, energy value by-products. It has been found that level average three years research varies within range 3.96–4.66 t/ha, maximum indicator obtained cultivar Riana. Conclusions. allowed determining mass plants, including product: studied is from 3.96 4.66 by-product 4.79 5.64 t/ha absolutely dry with 1:1.21, content Kfar. Calculations showed Kfar factors depend received substance synthesized plants reach 1.43 1.48 % cultivars Optima Veda, respectively (this characterizes crops these as ordinary) 1.61; 1.62 1.67 302 good).