Produtividade da soja em função de diferentes fontes e doses de corretivos de solo

Abstract

The objective of this work was to evaluate the surface application of corrective doses at different CTCpH7. The test was carried out in the agricultural year 2021 -2022, at the New Area at the Federal University of Santa Maria, located in the municipality of Santa Maria, Rio Grande do Sul (RS). A randomized block design was used, with six treatments and three replications. The work consisted of the following treatments: T1 (Limestone 3000 kg ha-1 ), T2 (Absolute control), T3 (200 kg ha-1 of Calsite), T4 (400 kg ha-1 of Calsite), T5 (800 kg ha-1 of Calsite), T6 (1600 kg ha-1 of Calsite), applied in two areas with different values at CTCpH7, one considered high and the other low. To understand the effects of treatments on soybean grain yield. Data were analyzed using the R Software (ver. 4.0.4) with the easyanova library (ver. 7.0) and submitted to analysis of variance, applying the Tukey test at 5% probability of error for comparison between treatments. The average productivity in the area with high CTCpH7 was 3240.3 kg ha-1 and in the area with low CTCpH7, it was 1608.7 kg ha-1 . The T6 treatment (Calsite, 1600 kg ha-1 ), showed the highest average grain yield in the area with high CTCpH7, however, this did not differ from the other treatments, although a difference of 8.44 sc ha-1 was observed among these. In the area with low CTCpH7, there was a difference, with the highest productivity observed in T4 (Calsite, 400 kg ha-1 ). All treatments showed good increases in grain yield compared to the control. These results demonstrate that nutrition with calcium is essential to obtain productive increases in soybeans. Calsite application proved to be more efficient than limestone. The management of building soil fertility and raising the CTCpH7 is essential for high soybean yields, in addition to a better response of the crop to the effects of water stress.