Loading...
Publication
Avaliação do efeito das práticas de controlo de infestantes nas características físico-químicas do solo em Horticultura Biológica
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 2.76 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
Dada a importância económica que tem o controlo das plantas infestantes na
agricultura, nomeadamente na horticultura biológica, é necessário estudar alternativas
eficazes.
No presente trabalho pretendeu-se avaliar e comparar três modalidades de
controlo de infestantes; a monda térmica, a monda mecânica e o corte de infestantes com
roçadora, nas características físico-químicas e biológicas do solo através da determinação
de determinados parâmetros; densidade aparente, taxas de infiltração, textura
granulométrica, análises químicas (sumária e bases de troca, micronutrientes e metais
pesados) e identificação da macrofauna predominante.
O ensaio decorreu entre abril e setembro de 2018, na parcela agrícola da Escola
Superior Agrária, que está certificada em modo de produção biológico e onde foram
instaladas as culturas de pimento (Capsicum annum L) e couve crespa (Brassica
oleraceae L). Foram instaladas 4 repetições por cada 3 linhas de cultura, e por cada
modalidade, perfazendo 24 repetições.
Os resultados obtidos nas modalidades em estudo revelam que, apesar de carecer
da continuidade de observações ao longo dos anos, apontam para que as modalidades
avaliadas possam ser alternativas viáveis e eficazes no controlo de infestantes em
Agricultura Biológica.
Palavras-chave: densidade aparente do solo, horticultura biológica, infestantes,
infiltrómetro de tensão, monda mecânica, monda térmica,
porosidade do solo
Given the economic importance of weed control in agriculture, in particular in organic horticulture, it is necessary to study effective alternatives. In the present work the aim was to evaluate and compare three modalities of weed control: thermal weeding, mechanical weeding and weed cutting with a brushcutter. The trial took place between April and September 2018, on the agricultural plot of the Escola Superior Agrária, which is certified in organic production and where the pepper (Capsicum annum L) and kale (Brassica oleraceae L) crops were installed. Four repetitions were installed for each 3 crop lines, and for each modality, totaling 24 repetitions. The aim was to evaluate the effects of alternative weed control practices in organic horticulture on overall soil fertility and the physical, chemical and biological characteristics of the soil. The parameters evaluated were the apparent density at the soil surface, the rates of soil surface infiltration, soil particle size texture, chemical analyses (summary, exchange bases, micronutrients and heavy metals) and identification of the predominant macrofauna in the soil. The results obtained in the study modalities show that, despite the lack of continuity of observations over the years, they point out that the modalities evaluated may be viable and effective alternatives in weed control in organic agriculture. Keywords: soil bulk density, organic horticulture, weeds, tension infiltrometer, weeding, thermal weeding, soil porosity
Given the economic importance of weed control in agriculture, in particular in organic horticulture, it is necessary to study effective alternatives. In the present work the aim was to evaluate and compare three modalities of weed control: thermal weeding, mechanical weeding and weed cutting with a brushcutter. The trial took place between April and September 2018, on the agricultural plot of the Escola Superior Agrária, which is certified in organic production and where the pepper (Capsicum annum L) and kale (Brassica oleraceae L) crops were installed. Four repetitions were installed for each 3 crop lines, and for each modality, totaling 24 repetitions. The aim was to evaluate the effects of alternative weed control practices in organic horticulture on overall soil fertility and the physical, chemical and biological characteristics of the soil. The parameters evaluated were the apparent density at the soil surface, the rates of soil surface infiltration, soil particle size texture, chemical analyses (summary, exchange bases, micronutrients and heavy metals) and identification of the predominant macrofauna in the soil. The results obtained in the study modalities show that, despite the lack of continuity of observations over the years, they point out that the modalities evaluated may be viable and effective alternatives in weed control in organic agriculture. Keywords: soil bulk density, organic horticulture, weeds, tension infiltrometer, weeding, thermal weeding, soil porosity
Description
Keywords
Densidade aparente do solo Horticultura biológica Infestantes Infiltrómetro de tensão Monda mecânica Monda térmica Porosidade do solo