impedÂncia mecÂnica em substratos hortÍcolas mechanical impedance in horticultural substrates

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ID: 188983
1999
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Ranked #177 of 193 articles by views in proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006

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Abstract
O poder de penetração das raízes no solo tem sido estudado com vistas a cultivos agrícolas, porém não há dados no que se refere a substratos em recipientes. Neste trabalho avalia-se a impedância mecânica de: areia, perlita, turfa, fibra-de-coco e misturas do mercado internacional: Fafard nº 2, Fafard 2P, Jiffy 7 e Oasis. Amostras secas e saturadas foram analisadas sob quatro níveis de compactação. Jiffy 7 e Oasis foram analisados na densidade original, conforme fabricação. Avaliou-se a impedância através de um pino metálico acoplado em micropenetrômetro digital. A pressão de penetração correlaciona-se com a compactação do substrato, apresentando interação significante entre grau de compactação e nível de umidade.
The penetration power of the roots into the soil has been studied in relation to field crops but not to container media. In this work the mechanical impedance of sand, perlite, peat, coir and commercial mixtures were evaluated: Fafard, no 2, Fafard 2P, Jiffy 7 and Oasis. Dry and saturated samples were analyzed under four levels of compactation. Jiffy 7 and Oasis were analyzed only in the original density of the manufactured products. The impedance was measured by a metal probe and a digital micropenetrometer. The penetration pressure is correlated to the level of compactation of the media, with significant interaction between compactation and moisture level.
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Authors ;ATELENE NORMANN KÄMPF;PAUL ALLEN HAMMER;TERRI KIRK
Journal proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006
Year 1999
DOI
10.1590/S0100-204X1999001100024
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999001100024
Keywords
Agriculture (General)

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