Atributos do solo com palma forrageira sob adubação orgânica, diferentes espaçamentos e épocas de amostragem

Abstract

The objective of this work was to evaluate the chemical attributes of the soil cultivated with ‘Gigante’ cactus pear under different doses of organic fertilizer, planting spacings and sampling times. The treatments, four doses of organic fertilizer with bovine manure (0, 30, 60 and 90 Mg ha-1 year-1 ), three spacings (1.0 x 0.5, 2.0 x 0.25 and 3.0 x 1.0 x 0.25 m) and three sampling times (0, 390 and 600 days after planting) corresponding to the periods prior to planting, growth and harvest of the first cycle, were arranged in a randomized complete block design factorial scheme 4 x 3 x 3, with three replicates. (B, Cu, Fe, Mn, Zn), parameters of the soil sorption complex (H + Al, SB, CTC, T, V) were determined in water, macronutrients (P, K, Ca, Mg) and micronutrients soil organic matter (MOS). The organic fertilization provided an increase in the values of MOS, P, K, Ca, Mg, SB, CTC, T, V, and H + Al reduction in soils cultivated with ‘Gigante cactus pear at different times. The doses of manure promoted increase of pH and Mn, regardless of season and spacing. The spacings did not influence the chemical attributes of the soil.