Soil preparation and planting techniques effects on weed biomass production on pineapple culture
Keywords:
Ananas comosus (Stickm.) Men., biomass, weed, planting, tillageAbstract
Wccd control rccomcndations in pineapple cultura are based on soil conventional tillage, but the use of strip-tillage and no-tillage affect botanic weed composition. At Fepagro Litoral Norte, Maquiné-RS (lat. 29°54 1S, long. 50°19'0, alt.46m, 1659mm), in the main plots the one assay (conventional tillage, strip-tillage and no-tillage) and in the subplots two planting techniques (furrow and spear), and weed biomass productivity and botanical composition wcrc cvaluated in two dates: on Aug./ 97, before the treatments application,where 9 wccd spccies wcrc idcntificd, on Nov./97, atter three months,where there were no influente of treatments to biomass production, but thc number of species clevated to 21, because of seed germination stimulation on strip-tillage and conventional tillagc. Digitaria horizontalis, Paspalum noramm,Agerammconyzoides and Cynodon dactilon wcrc prcscnt in all treatments, and contributed with more than 95% of total dry biomass. At Maquiné 9 species(89%) of thc wceds found worldwide on pineapple cultivatios and 14 (66%) of those found more commonly on pineapple cultivatcd in lhe brazilian northeast have been recorded.
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