O objetivo deste trabalho foi determinar a acurácia em medidas do potencial mátrico da água no solo (ψ_m) por tensiômetros de punção com cápsulas arredondadas ou pontiagudas, instalados com ou sem “lama de solo”, e comparar o desempenho destes tensiômetros com o de tensiômetros com manômetros de mercúrio. O experimento foi conduzido em Argissolo Vermelho-Amarelo distrófico, em delineamento experimental de blocos ao acaso, em arranjo fatorial, com cinco repetições. Tensiômetros de punção com cápsulas arredondadas, instalados com “lama de solo”, apresentam maior acurácia nas determinações do ψ_m em uma faixa mais ampla de medidas, assemelhando-se aos tensiômetros com manômetros de mercúrio com o secamento do solo.

Termos para indexação:
tensiômetros de punção; cápsula arredondada; lama de solo

Autoria

Hélio Henrique Soares Franco

Universidade Estadual de Maringá, CEP 87020-900, Maringá, PR, Brazil. E-mail: hhsfranco@hotmail.com, catormena@uem.br, camilajbferreira@gmail.comUniversidade Estadual de MaringáBrazilMaringá, PR, BrazilUniversidade Estadual de Maringá, CEP 87020-900, Maringá, PR, Brazil. E-mail: hhsfranco@hotmail.com, catormena@uem.br, camilajbferreira@gmail.com

Alvaro Pires da Silva
(2)In memoriam.

Cássio Antonio Tormena

Camila Jorge Bernabé Ferreira

Márcio Renato Nunes

Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, CEP 13418-260 Piracicaba, SP, Brazil. E-mail: marcio_r_nunes@usp.br, renato_agro_@hotmail.com, pllibard@usp.brUniversidade de São PauloBrazilPiracicaba, SP, BrazilUniversidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, CEP 13418-260 Piracicaba, SP, Brazil. E-mail: marcio_r_nunes@usp.br, renato_agro_@hotmail.com, pllibard@usp.br

Renato Paiva de Lima

Paulo Leonel Libardi

⁽²⁾In memoriam.

SCIMAGO INSTITUTIONS RANKINGS

Figuras

Figuras (2)

Thumbnail

Figure 1.
Linear regressions between soil water matric potential (ψ_m), in modules, measured in the control treatment, and ψ_m, in modules, calculated in the other treatments: A, standard x R-SM; B, standard x R+SM; C, standard x P-SM; and D, standard x P+SM. * and **Significant by the t-test, at 5 and 1% probability, respectively. ^nsNonsignificant. R-SM, puncture tensiometer with rounded porous cup without using “soil mud” in the installation process; R+SM, puncture tensiometer with rounded porous cup using “soil mud” in the installation process; P-SM, puncture tensiometer with pointed porous cup without using “soil mud” in the installation process; P+SM, puncture tensiometer with pointed porous cup using “soil mud” in the installation process; and standard (control), tensiometer with both rounded porous cup and mercury manometer using “soil mud” in the installation process.

Thumbnail

Figure 2.
Means of soil water matric potential (ψ_m), in modules, measured in the experiment in function of soil drying. Letters equal to the control treatment (standard) within the same readings did not differ according to Dunnett’s test, at 5% probability. R-SM, puncture tensiometer with rounded porous cup without using “soil mud” in the installation process; R+SM, puncture tensiometer with rounded porous cup using “soil mud” in the installation process; P-SM, puncture tensiometer with pointed porous cup without using “soil mud” in the installation process; P+SM, puncture tensiometer with pointed porous cup using “soil mud” in the installation process; and standard (control), tensiometer with both rounded porous cup and mercury manometer using “soil mud” in the installation process

Figure 1. Linear regressions between soil water matric potential (ψ_m), in modules, measured in the control treatment, and ψ_m, in modules, calculated in the other treatments: A, standard x R-SM; B, standard x R+SM; C, standard x P-SM; and D, standard x P+SM. * and **Significant by the t-test, at 5 and 1% probability, respectively. ^nsNonsignificant. R-SM, puncture tensiometer with rounded porous cup without using “soil mud” in the installation process; R+SM, puncture tensiometer with rounded porous cup using “soil mud” in the installation process; P-SM, puncture tensiometer with pointed porous cup without using “soil mud” in the installation process; P+SM, puncture tensiometer with pointed porous cup using “soil mud” in the installation process; and standard (control), tensiometer with both rounded porous cup and mercury manometer using “soil mud” in the installation process.

Figure 2. Means of soil water matric potential (ψ_m), in modules, measured in the experiment in function of soil drying. Letters equal to the control treatment (standard) within the same readings did not differ according to Dunnett’s test, at 5% probability. R-SM, puncture tensiometer with rounded porous cup without using “soil mud” in the installation process; R+SM, puncture tensiometer with rounded porous cup using “soil mud” in the installation process; P-SM, puncture tensiometer with pointed porous cup without using “soil mud” in the installation process; P+SM, puncture tensiometer with pointed porous cup using “soil mud” in the installation process; and standard (control), tensiometer with both rounded porous cup and mercury manometer using “soil mud” in the installation process

Como citar

copiar

Embrapa Secretaria de Pesquisa e Desenvolvimento; Pesquisa Agropecuária Brasileira Caixa Postal 040315, 70770-901 Brasília DF Brazil, Tel. +55 61 3448-1813, Fax +55 61 3340-5483 - Brasília - DF - Brazil
E-mail: pab@embrapa.br

Acompanhe os números deste periódico no seu leitor de RSS

Versão para download de PDF

PDF

Inglês

Versões e tradução automática

Versão original do texto

English

Tradução automática

Google Translator
Microsoft Translator

Como citar

RIS

BIBTEX

Outros formatos de citação e exportação:

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
E-mail: scielo@scielo.org

Leia a Declaração de Acesso Aberto

Métricas

Mensagem

[1] ⁽²⁾In memoriam.