Ampliação da época de semeadura de feijão safrinha para região sudoeste do Paraná

Abstract

The bean crop can be highly influenced by environmental factors, in this way, it is considered a plant of high response to the environment, and may present several adverse factors according to the conditions in which the plants develop. In view of this, the present work has the objective of carrying out an evaluation of productivity and yield components of bean cultivars in four different planting seasons in the off-season period. The factorial experiment consisted of six bean cultivars, sown at four different times with four replications in a randomized block design. The cultivars BRS FC 104, BRS Estilo, IAC Netuno, IAC Milênio, IPR Urutau and IAC Veloz were used. The planting carried out in the last season resulted in a reduction of 56.1% in the productivity of the IPR Urutau cultivar, 63.2% for the IAC Netuno cultivar, 32.95% for the IAC Veloz cultivar, 60.9% of the cultivar BRS FC 104 and a reduction of 32.6% for cultivar BRS Estilo. There was a reduction of 12.3%, 15.6% and 42.9% in productivity in the second, third and fourth epochs, respectively, when compared to the first. From these data, having the date of sowing in the first season as a control, it can be concluded that the delay in sowing in the second season resulted in a reduction of 286.9 kg ha-1, the planting carried out in the third season resulted in a loss of 366.1 kg ha -1 in yield and the delay of the fourth season resulted in a reduction of 1339.3 kg ha-1 in yield. It is advisable to carry out the sowing until the 10/02, where climatic conditions are adequate for yields above 1500 kg ha-1. In the same way that after this period there are high productivity losses, in addition to the increased risk of frost for the southwestern region of Paraná.