Efeito das lâminas de irrigação em diferentes variações do preparo convencional do solo, no cultivo do amendoim.

Abstract

With the water deficit in semi-arid regions, research seeking alternatives to water and soil management, aiming at the efficiency and productivity of peanut cultivation, have been topics of researchers' concern to alleviate the consequences of prolonged droughts and ways of living with drought. In this context, the present research was carried out to evaluate the effect of irrigation slides and soil preparation systems on peanut crop productivity BR-1. The experiment was conducted in the field in the municipality of Petrolândia -PE, semi-arid region of Northeast Brazil. A randomized block experimental design was used, and the plots were arranged in a strip in 4 replications, with soil preparation arranged in the main plot and irrigation slides in the secondary plots, thus distributed. Soil preparation with disk plow followed by leveling grid (SP1); Soil preparation with harrow (SP2); Soil preparation with ripening plow followed by leveling grid (SP3); Soil preparation with ripening plow followed by plow grating (SP4). The irrigation slides used were: 50, 75, 100 and 125% of the crop water requirement (ETc). Peanut growth and production in the 1st and 2nd cycle, soil physical attributes and mechanized set were analyzed. The 75% ETc blade had higher plant height at 60 DAE, with about 20 cm and SP2 with 100% ETc slides had 28% of pods with 2 grains, in the 1st cycle. In the second cycle SP3 is the type of preparation indicated to obtain a higher production increase, obtaining around 177 bags. The consecutive increases of the irrigation slides resulted in an increase in productivity. The higher efficiency of water use was observed with the 50% slide in both cycles. For soil porosity density SP2 was the one that obtained the best field yield for the mechanized system.