potencial de espécies utilizadas como adubo verde no manejo integrado de plantas daninhas potential of species used as green manure in the integrated weed management

Clicks: 281
ID: 235646
2004
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Abstract
O presente trabalho foi conduzido na Estação Experimental da Universidade Federal do Tocantins, Gurupi-TO, Brasil. O experimento foi instalado com o objetivo de avaliar durante 60 dias, em campo, a interferência de oito espécies utilizadas freqüentemente como adubos verdes (Mucuna aterrima, Mucuna pruriens, Crotalaria ochroleuca, Crotalaria spectabilis, Canavalia ensiformis, Cajanus cajan, Pennisetum americanum e Sorghum bicolor, híbrido BR304) sobre a comunidade infestante. As espécies de plantas daninhas mais freqüentes na área do experimento foram: Digitaria horizontalis, Hyptis lophanta e Amaranthus spinosus. Foram realizadas amostragens aos 15, 30, 45 e 60 dias após a formação da cobertura, utilizando um quadrado de amostragem equivalente a 0,25 m². As plantas daninhas foram devidamente identificadas, coletadas, secas e pesadas. O delineamento experimental utilizado foi inteiramente casualizado e constou de nove tratamentos, com quatro repetições cada. Verificou-se que as espécies C. spectabilis, S. bicolor, C. ochroleuca, M. aterrima e M. pruriens reduziram significativamente o número e o peso da matéria seca da população das plantas daninhas avaliadas (D. horizontalis, H. lophanta e A. Spinosus), principalmente as duas últimas, enquanto P. americanum mostrou-se a menos eficiente nesse aspecto.
This work was carried out at the Experimental Station of the University of Tocantins, Gurupi-TO, Brazil, to evaluate the interference of eight species frequently used as green manure (Mucuna aterrima, Mucuna pruriens, Crotalaria ochroleuca, Crotalaria spectabilis, Canavalia ensiformis, Cajanus cajan, Pennisetum americanum and Sorghum bicolor, hybrid BR304) in the weed community, for sixty days under field conditions. The most frequent weed species in the experimental area were Digitaria horizontalis, Hyptis lophanta and Amaranthus spinosus. Samplings were made at 15, 30, 45 and 60 days after formation of green manure covering, using a square sampler of 0.25 m². The weeds were identified, collected, dried and weighed. The experimental design consisted of nine treatments distributed in randomized blocks with four replicates. It was verified that C. spectabilis, S. bicolor, C. ochroleuca M. aterrima and M. pruriens reduced significantly the number and dry matter weight of the weeds evaluated, especially H.lophanta and A. spinosus, while P. americanum was the least efficient.
Reference Key
erasmo2004plantapotencial Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;E.A.L. Erasmo;W.R. Azevedo;R.A. Sarmento;A.M. Cunha;S.L.R. Garcia
Journal anti-cancer agents in medicinal chemistry
Year 2004
DOI
10.1590/S0100-83582004000300002
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582004000300002
Keywords
competition allelopathy alelopatia

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