Correlação entre produção de feijão e atributos físicos de um Latossolo em Mato Grosso do Sul

Abstract

Correlation between common bean production and physical attributes of an Oxisol in Mato Grosso do Sul State, BrazilIn Brazil, common bean is in one of the most representative economic crops, not only because of its growing area but also because of the economic value of its production. In the crop year 2006/07, in Selvíria (MS), we analyzed the common bean yield as a function of some physical attributes of a Typic Acrustox in minimum tillage and center pivot irrigation system. The aim of this work was to evaluate among the soil physical attributes, under minimum tillage, those that better explain the variability of bean yield using the Pearson and spatial correlations,. A geostatistical grid was installed to collect data from soil and plants, with 117 sampling points in an area of 2025 m 2 and homogeneous slope of 0.055 m m -1 . The results showed a low yield of bean, which occurred probably due to a lower density of plants that the system provided. Thus, for the minimum tillage system, the bean yield could be explained as a function of total porosity and bulk density.Key words: management system, penetration resistance, soil moisture, bulk density, Phaseolus vulgaris L. No Brasil, a cultura do feijoeiro é uma das mais representativas explorações agrícolas, não só pela área de cultivo, como também pelo valor econômico de sua produção. No ano agrícola de 2006/07, no município de Selvíria (MS), foi analisada a produtividade de grãos do feijoeiro, em função de alguns atributos físicos de um Latossolo Vermelho distroférrico, em sistema de cultivo mínimo e irrigado com pivô central. Este trabalho objetivou avaliar, dentre os atributos físicos do solo, sob cultivo mínimo, aqueles que melhor expliquem, pela correlação de Pearson e espacialmente, a variabilidade da produtividade de grãos de feijão. Para tanto, foi instalada uma malha geoestatística, para a coleta de dados do solo e da planta, com 117 pontos amostrais, numa área de 2025 m 2 e declive homogêneo de 0,055 m m -1 , 5%. Os resultados mostraram que houve baixa produtividade de grãos do feijoeiro, ocorrida provavelmente por causa de uma menor densidade de plantas que esse sistema proporcionou. Dessa forma, para o sistema de cultivo mínimo do solo, a produtividade de feijão pôde ser explicada, em função da porosidade total e da densidade do solo.Palavras-chave: sistema de manejo, resistência à penetração, umidade, densidade do solo, Phaseolus vulgaris L.

Inter-relationships of Resistance to Penetration, Moisture and Soil Organic Matter with Irrigated Bean Yield in Mato Grosso do Sul, Brazil

“…Also, the PR1 and PR2 together with OM2 presented very high variability, 49.6%; 30.9%; and 42.3%, respectively. The same results with penetration resistance were found by Montanari et al [6], studying the correlation among bean grain yield and physical properties of an Oxisol in Mato Grosso do Sul, finding variations from 58.1% for RP1, and 51.3% for RP2. Dalchiavon et al [4] found high variation (20.9%) for OM2, when studying the productivity interrelations of the ratoon crops of sugarcane with penetration resistance and the soil moisture and organic matter.…”

“…The total of sample points in this case was 36, and in the data network it was 117. This sampling type using higher density meshes within a larger mesh was also used in studies by Montanari et al [6], Montanari et al [7].…”

Space variability of phenological indicators of common bean crop

“…This type of sampling using higher density grids within a larger mesh was also used in the study conducted by Montanari et al, (2013a and2013b).…”

Physical Quality Indicators of an Oxisol Under Grass in the Agreste Region of Paraiba, Brazil

“…This increase in BD can lead to changes in the physical and hydraulic attributes of the soil, especially the retention and availability of water to the plants. Montanari et al (2013) verified that the increase in BD promoted a decrease in the production of bean pods cultivated on Oxisol in the state of Mato Grosso do Sul. In their interpretation this fact is due to the increase in the compaction degree and reduction of soil porosity.…”