plantas daninhas de uma pastagem cultivada de baixa produtividade no nordeste paraense weeds of pasture low yielded areas of northeastern in the pará state

Clicks: 255
ID: 251704
1999
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Abstract
Atualmente existem 23 milhões de hectares de pastagens cultivadas em área originalmente sob floresta na Amazônia. Desse total, em torno de cinco milhões de hectares encontram-se com baixa produtividade ou em vias de degradação, infestados de plantas daninhas. Com o objetivo de identificar as plantas daninhas que ocorrem em área de pastagem de baixa produtividade em Terra Alta, PA ( 0º 58” S e 47º 52” W. Gr. ), foram efetuados levantamentos botânicos qualitativos, pelo método visual e coleta de todas as espécies presentes na área. Foram registradas 34 famílias, representadas por 118 espécies, destacando-se as famílias Leguminosae, Gramineae, Malvaceae, Myrtaceae, Cyperaceae e Asteraceae com 21, 16, 8, 7, 6 e 6 espécies, respectivamente. As plantas daninhas consideradas mais importantes foram: Borreira verticillata, Rolandra argentea, Desmodium canum, Davilla rugosa, Vismia guianensis e Imperata brasiliensis.
Presently there are 23 million hectares of cultivated pasture in forest ecosystem of the Amazon Region. From that area, 5 million hectares are low yield or in some stage of degradation and invaded by weeds. Aiming to identify the weed species that occur in degraded pastures of Terra Alta, state of Pará (0º 58” S e 47º 52” W. Gr. ), a botanical survey was carried out, colleting samples of all weed species presents in the area. Thirty-four families were recorded represented by 118 species, being Leguminosae, Gramineae, Malvaceae, Myrtaceae, Cyperaceae and Asteraceae the most important families with 21, 16, 8, 7, 6 and 6 species respectively. The most important weed species were: Borreira verticillata, Rolandra argentea, Desmodium canum, Davilla rugosa, Vismia guianensis e Imperata brasiliensis.
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Authors ;Raimundo E. B. Mascarenhas;Moisés de S. Modesto Júnior;Saturnino Dutra;Antonio P. da S. Souza Filho;José F. Teixeira Neto
Journal anti-cancer agents in medicinal chemistry
Year 1999
DOI
10.1590/S0100-83581999000300008
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581999000300008
Keywords
weeds amazonia amazonybiology (general)botany

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