Desempenho de plantas de soja em terras baixas: características agronômicas e qualidade da semente produzida

Abstract

Soybeans, when cultivated in lowlands, are subject to abiotic stresses, due to adverse environmental characteristics, mainly water stress, culminating in the reduction of their productive potential, with variable damage in the functions of the genotype. On the other hand, in the state of Rio Grande do Sul, many areas with these resources are used for the cultivation of this species. The present study aims to evaluate the performance of one of the soybean cultivars produced in the lowlands, the effect of the environment on the agronomic resources and the quality of the seeds produced. We use as cultivars HO Amambay IPRO, HO Jacuí IPRO, HO, Burro IPRO, HO Pirapó IPRO, HO Tereré IPRO, BMX Fibra IPRO, BMX Valente RR, TMG 7260 IPRO, BS 2606 IPRO, SYN 1561 IPRO and TEC IRGA 6070 RR, in two experiments, the first was conducted in a field in two lowland environments in the south of the river in the states of cristal and arambaré, in a randomized block design, with four replications. The second was carried out in the didactic laboratory of seed analysis, belonging to the Federal University of Pelotas, in a randomized open design, aiming to evaluate the quality of the reproduced seed. Observe an intense interaction between genetics, environment and management, causing clear differences in responses, demonstrating a high plasticity of the culture in adapting and testing compensation mechanisms were also observed. However, only in the municipality of Arambaré, if you have a performance compatible with the state average, you will receive a report of the cultivar Ho Pirapó IPRO as well as cultivar HO Jacuí IPRO, BMX Valente RR, HO Tereré IPRO, TMG 7260 IPRO, SYN 1561 IPRO , BS 2606 and TEC IRGA 6070 RR, demonstrating the potential to maintain high productivity even under stress conditions. What is the physiological quality of the absorbed seeds, if the lowest plants and the smallest numbers of nodes produce seeds with the highest physiological quality, in which the two species located will be produced with high quality.