Characterization of soils cultivated with cassava under different managements/Caracterizacao de solos cultivados com mandioca sob diferentes manejos.

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Publisher: ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior
Document Type: Article
Length: 5,443 words

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Abstract :

HIGHLIGHTS: The predominant textural class in the different areas cultivated with cassava is sandy clay loam. Cassava agricultural areas with different managements have low fertility and organic matter concentration. The chemical attributes of the soil were the most significant to distinguish the different areas cultivated with cassava. Although cassava is an undemanding crop in terms of soil chemical fertility, the scarcity of nutrients affects crop productivity and it is common to cultivate it in soils with low natural fertility as occurs in Coastal Tablelands. In this context, the present study aimed to evaluate the physical and chemical attributes of soils cultivated with cassava under different managements. The study was carried out in the municipality of Sao Felipe, located in the landscape unit of Coastal Tablelands, Bahia state, Brazil. Fifteen properties were selected to evaluate the characteristics of soils cultivated with cassava under different types of management. Soil sampling was carried out during the months of October and November 2018, a dry period in the region. The medium-textured soil was predominant in the different areas of management of cassava cultivation. Most areas showed pH below the recommended range for cassava (5.5 to 6.5), base saturation below 50% and low phosphorus, potassium, calcium, and magnesium contents, according to the crop's nutritional needs. The first two principal components explained 84.65% of the total variance. Thus, it was possible to verify that the diversity of management of cassava production areas results in high or very high variability of soil chemical attributes. The attributes pH, P, Al, H + Al, V, CEC and OM are the most representative in the distinction of soils of the cassava cultivation areas evaluated. Key words: Manihot esculenta Crantz, mineral fertilization, organic fertilization, agricultural practices Embora a mandioca seja uma cultura pouco exigente em termos de fertilidade quimica do solo, a escassez de nutrientes afeta a produtividade da cultura, sendo comum o seu cultivo em solos de baixa fertilidade natural, como ocorre nos Tabuleiros Costeiros. Nesse contexto, o presente estudo teve como objetivo avaliar os atributos fisicos e quimicos de solos cultivados com mandioca sob diferentes manejos. O estudo foi realizado no municipio de Sao Felipe, inserido na unidade paisaglstica Tabuleiros Costeiros, Bahia, Brasil. Quinze propriedades foram selecionadas para avaliar as caracterlsticas dos solos cultivados com mandioca sob diferentes manejos. As coletas de solo foram realizadas durante os meses de outubro e novembro de 2018, periodo de seca na regiao. A textura media do solo foi predominante nas diferentes areas de manejo de cultivo de mandioca. A maioria das areas apresentou pH abaixo da faixa recomendada para mandioca (5,5 a 6,5), saturacao por base abaixo de 50% e baixo teor de fosforo, potassio, calcio e magnesio, de acordo com as necessidades nutricionais da cultura. Os dois primeiros componentes principais explicaram 84,65% da variancia. Assim, foi possivel verificar que a diversidade de manejo das areas de producao de mandioca resulta em alta ou muito alta variabilidade dos atributos quimicos do solo. Os atributos pH, P, Al, H + Al, V, CEC e MO sao os mais representatives na distincao dos solos das areas de cultivo de mandioca avaliadas. Palavras-chave: Manihot esculenta Crantz, adubacao mineral, adubacao organica, praticas agricolas

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Gale Document Number: GALE|A674989395