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      Disponibilidade hídrica e distinção de ambientes para cultivo de cafeeiros Translated title: Water availability and landscape distinction for coffee cultivation

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          Abstract

          Este estudo foi realizado nos municípios de São Roque de Minas e Vargem Bonita, MG, com o objetivo de distinguir ambientes cultivados com cafeeiros quanto à disponibilidade hídrica para a cultura. A umidade de oito glebas de cafeeiro foi monitorada e em cinco delas determinadas a disponibilidade de água para as plantas e a densidade do solo. As glebas estão situadas em áreas de Latossolo e Cambissolo e em uma gleba de cada classe foi realizado estudo da distribuição do sistema radicular do café no perfil do solo. A umidade foi monitorada no período de abril de 2008 a fevereiro de 2009, com frequência de 30 a 40 dias, amostradas as profundidades de 0,2; 0,4; 0,8; 1,2 e 1,6 m nas posições linha e entrelinha da cultura. Observou-se que a umidade do solo é menor na linha da cultura em relação à entrelinha. A classe de solo e a idade da lavoura também influenciaram a umidade do solo e a disponibilidade de água para as plantas. O sistema radicular do cafeeiro atingiu a camada de 1,5 a 1,7 m de profundidade de ambas as classes de solo estudadas. Por meio da análise de componentes principais separaram-se os 50 tratamentos em 4 grupos referentes à classe de solo e ao manejo.

          Translated abstract

          This study was conducted in the districts of São Roque de Minas and Vargem Bonita, MG, with the aim to distinguish landscapes for coffee growing, with higher water available to the crop. Soil moisture was monitored in eight plots of coffee, and in five of them being also determined water availability for plants and soil bulk density. The plots are located in areas of Latosols and Cambisols. In one plot of each soil class, the distribution of the root system of coffee in the soil profile was studied. Soil moisture was monitored from April 2008 to February 2009, in the interval of 30 to 40 days. The soil depths of 0.2, 0.4, 0.8, 1.2 and 1.6 m were sampled, in line and between the lines of the coffee. The combination of the five plots, two sampling positions (line and between the lines) and five depths, formed the 50 Treatments used in the multivariate analysis. It was observed that soil moisture is lower in the line of coffee compared to between lines. The class of soil and plant age influence soil moisture and water availability to plants. The root system of coffee reached the depth of 1.5 to 1.7 m, in both studied soil classes. The 50 Treatments were grouped into 4, by means of the principal component analysis, according to the soil class and management.

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          A Closed-form Equation for Predicting the Hydraulic Conductivity of Unsaturated Soils1

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            Sisvar: a computer statistical analysis system

            Sisvar is a statistical analysis system, first released in 1996 although its development began in 1994. The first version was done in the programming language Pascal and compiled with Borland Turbo Pascal 3. Sisvar was developed to achieve some specific goals. The first objective was to obtain software that could be used directly on the statistical experimental course of the Department of Exact Science at the Federal University of Lavras. The second objective was to initiate the development of a genuinely Brazilian free software program that met the demands and peculiarities of research conducted in the country. The third goal was to present statistical analysis software for the Brazilian scientific community that would allow research results to be analyzed efficiently and reliably. All of the initial goals were achieved. Sisvar gained acceptance by the scientific community because it provides reliable, accurate, precise, simple and robust results, and allows users a greater degree of interactivity.
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              Methods of Studying Root Systems

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                Author and article information

                Journal
                rbeaa
                Revista Brasileira de Engenharia Agrícola e Ambiental
                Rev. bras. eng. agríc. ambient.
                Departamento de Engenharia Agrícola - UFCG (Campina Grande, PB, Brazil )
                1415-4366
                1807-1929
                April 2013
                : 17
                : 4
                : 362-370
                Affiliations
                [01] Cáceres MT orgnameInstituto Federal de Educação, Ciência e Tecnologia de Mato Grosso : milson.serafim@ 123456cas.ifmt.edu.br
                [02] Lavras MG orgnameUFLA orgdiv1DCS jmlima@ 123456dcs.ufla.br
                [03] Curitiba PR orgnameUFPR orgdiv1Depto. de Estatística walmes@ 123456ufpr.br
                [04] Almenara MG orgnameInstituto Federal de Educação, Ciência e Tecnologia do Norte de Minas vico.lima@ 123456ifnmg.edu.br
                Article
                S1415-43662013000400002 S1415-4366(13)01700400002
                78ec7ee1-dacc-45a4-8463-3d625c8255e4

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 25 January 2013
                : 29 March 2012
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 29, Pages: 9
                Product

                SciELO Brazil

                Categories
                Manejo de Solo, Água e Planta

                manejo conservacionista,water availability,root system,conservation management,perfil cultural,disponibilidade hídrica,sistema radicular,cultural profile

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