Soil preparation and planting techniques effects on weed biomass production on pineapple culture
Abstract
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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