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Supressão de plantas daninhas utilizando plantas de cobertura do solo

Authors: Borges, W. L. B.; Freitas, R. S.; Mateus, G. P.; Sá, M. E.; Alves, M. C.;

Supressão de plantas daninhas utilizando plantas de cobertura do solo

Abstract

Este trabalho foi realizado com o objetivo de avaliar a cobertura do solo e o efeito supressivo sobre plantas daninhas utilizando plantas de cobertura, em diferentes densidades de semeadura. Os experimentos foram instalados em Votuporanga-SP e Selvíria-MS, em março de 2008, após o preparo convencional do solo. O delineamento experimental utilizado foi o de blocos casualizados com quatro repetições, onde as plantas de cobertura com diferentes densidades de semeadura constituíram os tratamentos: Sorghum bicolor : 6, 7 e 8 kg ha-1; Pennisetum americanum: 10, 15 e 20 kg ha-1; Sorghum sudanense: 12, 15 e 18 kg ha-1; híbrido de S. bicolor com S. sudanense: 8, 9 e 10 kg ha-1; Urochloa ruziziensis: 8, 12 e 16 kg ha-1; e um tratamento controle com vegetação espontânea. Após o manejo das coberturas, foi semeada a soja. Avaliou-se a biomassa seca e densidade das plantas daninhas no momento do corte/colheita das plantas de cobertura. Em Votuporanga, também foi feita uma avaliação das plantas daninhas aos 35 dias após a semeadura da soja. A cobertura do solo proporcionada pelas coberturas foi avaliada no momento da dessecação e no florescimento da cultura da soja. Concluiu-se que U. ruziziensis e S. sudanense reduziram a infestação das plantas daninhas em mais de 90% e mantiveram a cobertura do solo superior a 80% até o florescimento da cultura da soja.

Keywords

571, QH301-705.5, germinação, Botany, Germinação, Germination, Urochloa ruziziensis, Sorghum bicolor, Sowing density, germination, densidade de semeadura, QK1-989, sowing density, Sorghum sudanense, Pennisetum americanum, Biology (General), Densidade de semeadura

  • BIP!
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    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    16
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
16
Top 10%
Top 10%
Average
Green
gold