Soil fertility and acidity correction in recovering areas require high doses of correctives and fertilizers. Therefore, the use of low-cost products may be an alternative in infertile areas. The objective of this study was to evaluate the effect of soil fertilization and correction methods on the yield of degraded areas cultivated with Urochloa decumbens and soil chemical attributes. The study was conducted in Orthic Quartzarenic Neosol in Mineiros, Goiás, Brazil, from October 2011 to September 2013. The experiment included soil samples treated with 2 Mg ha-1 of dolomitic limestone, a standard fertilizer (45, 54, and 75 kg ha-1 of N, P, and K, respectively), or 3 Mg ha-1 of turkey litter, and a control sample without correction/fertilization. Each treatment included four replicates in a completely randomized block design. The experimental plots consisted of areas of 4.0 m2 (2.0 ?? 2.0 m). The dry matter yield of forage grass and the following soil chemical attributes were evaluated: organic matter, hydrogen potential (pH in CaCl2), phosphorus (resin), potassium, calcium, magnesium, cation exchange capacity (CEC), and base saturation. The data were subjected to analysis of variance, and the means were compared using Tukey’s test at a level of significance of 0.05. Fertilization did not affect the pH, potassium, and CEC of the soil. Fertilization with turkey litter increased the levels of organic matter, phosphorus, calcium, magnesium, and base saturation compared with soils subjected to standard fertilization or liming. Furthermore, soils fertilized with turkey litter presented higher dry matter yield of Urochloa decumbens compared with unfertilized soils or soils subjected to acidity correction by liming but were not significantly different from soils treated with standard fertilizers. Therefore, fertilization with 3 Mg ha-1 of turkey litter is recommended for improving degraded pastures.

Objetivou-se com a presente pesquisa avaliar os efeitos da adubação orgânica com cama de frango nos atributos biológico e físico-hídricos de um solo ocupado com eucalipto. A pesquisa foi realizada no município de Mineiros-GO em neossolo quartzarênico textura argilosa ocupado com clones de Eucalyptusurograndis GG 100 de seis anos de idade. O experimento foi montado no delineamento inteiramente casualizado, com quatro tratamentos de adubação orgânica (0, 2, 4 e 6 kg planta-1 de cama de frango), uma testemunha (210g planta-1 de NPK20-0-20) e três repetições. Os parâmetros avaliados foram: respiração microbiana, densidade do solo, porosidade total e livre. Os dados foram submetidos às análises de variância, teste de média (Dunnett a 5%), regressão (linear e quadrática) e correlação simples. A dose de 5,5 kg planta-1 de cama de frango maximizou a respiração microbiológica do solo cultivado com eucalipto. A adubação química de 210 g planta-1 de NPK proporcionou maior respiração microbiana em relação ao solo não adubado. A dose de 4 kg planta-1 de cama de frango, em relação à adubação química, proporcionou em geral melhor qualidade físicohídrica ao solo cultivado com eucalipto. A respiração microbiana não se correlacionou com os atributos físico-hídricos do solo cultivado com eucalipto no sudoeste goiano.

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The aimed of this study was to evaluate the effects of different dosages of turkey litter on soil’s chemical attributes and yield of the Urochloa decumbens in classified as degraded pasture. The work was performed at the municipality of Mineiros-GO between October/2011 and September/2013 in Quartzipsamment soil. The treatments consisted in applications of 0, 3, 6, 9 and 12 Mg ha-1 of turkey litter at a randomized-complete blocks design with four replications. Was evaluated the fodder’s productivity and the following soil’s chemical attributes: organic matter, hydrogenionic potential (CaCl2), phosphorus (resin), potassium, calcium, magnesium, cation exchange capacity and base saturation of soil. In general terms, the increase of turkey litter’s doses increased the grass productivity and the supply of nutrients of the soil, maintaining the balance of the soil-plant system. The dosage of 12 Mg ha-1 year-1 of turkey litter ensure higher amounts in the soil’s chemical attributes and in the productivity of dry mass of Urochloa decumbens.