EFEITO DOS SISTEMAS CONSERVACIONISTAS DO SOLO E RESIDUAL DO GESSO SOBRE A CULTURA DA SOJA

O experimento obteve o intuito de estudar as sequencias de manejos conservacionistas do solo sobre os atributos de producao da soja. O estudo foi realizado na area experimental da fazenda de Pesquisa e Extensao pertencente a UNESP, Campus de Ilha Solteira - SP. O delineamento experimental foi o de blocos ao acaso, com quatro sistemas de cultivo: Plantio Direto Continuo (SPD-SPD) e Alternado (SPD-CM), Cultivo Minimo Continuo (CM-CM) e Alternado (CM-SPD) com ou sem o uso de gesso. Foram avaliadas as caracteristicas agronomicas da soja. As varias formas e metodos dos sistemas conservacionistas do solo junto a gessagem tiveram por finalidade melhorar as caracteristicas do solo e agronomicas da soja, porem neste trabalho nao foi possivel identificar um melhor manejo do solo com uso do gesso, mas sim demonstrar que independentemente do sistema utilizado, o gesso proporcionou melhores caracteristicas fisicas e quimicas do solo e agronomicas da soja. O sistema de plantio direto continuo proporcionou os maiores valores para a populacao inicial e final. O uso do gesso agricola somente proporcionou maiores valores na massa de 100 graos. Palavras-chave: gesso agricola, Glycine max (L.), manejo do solo. EFFECT OF SOIL CONSERVATIONIST SYSTEMS AND GYPSUM RESIDUE ON SOYBEAN ABSTRACT This experiment was obtained in the aim of studying the sequences of conservation soil management systems on soybean production attributes. The study was conducted at the experimental farm area of Research and Extension belonging to UNESP, Ilha Solteira - SP. The experimental design was a randomized block, with four farming systems: no tillage Continuous (SPD-SPD) and alternating (SPD-CM), Cultivation Continuous minimum (CM-CM) and alternating (CM-SPD) with or without the use of plaster. were evaluated the Agronomic characteristics of soybean . The various forms and methods of soil conservation systems with use plaster were intended to improve the soil characteristics and agronomic of soybean. But this work was not possible to identify a better soil management with the use of plaster, but yes demontar that regardless of the system used, the plaster provides better physical and chemical characteristics of the soil and soybean agronomic The no tillage system continuous provide the highest values for initial and final population. The use of phosphogypsum provided only values greater the weight of 100 grains. Keywords: agricultural gypsum, Glycine max (L.), soil management. DOI: http://dx.doi.org/10.14583/2318-7670.v04n06a05