Avaliação do crescimento inicial de plantas de sabiá (Mimosa caesalpiniifolia Benth) sob diferentes níveis de adubação orgânica.

Abstract

Thesystematic eliminationof forest coverthrough thesavannabiomemodelextractionand misuseof landhas causedserious environmental problemsinsemiaridnortheast.TheSabiáis a kindused for varioususes,such aspoles,fence posts, firewood and charcoal, as a pioneer plantand presentrapid growth.This workaimed tostudy the influence ofphosphatefertilizer, potassium andorganic matter in theinitial growth ofSabiáplants(Mimosa caesalpiniifoliaBenth) developing in thesemiarid regionof Paraíba.The study areais located onFazendaCachoeira de São Porfírio,in the municipality ofVárzea- PB, under the coordinates7°2'20''south latitude and37º 26'43''longitude west of Greenwich. The experiment, which lasted seven months, was installedin April2011, the first samples collectedforty-three daysafter installation.The resultsshow that thebasal diameterwas influencedonly byplant sabiá,this could haveoccurred onlyby the naturaldevelopment of the species. The joint applicationof manureand potassium in thehigher dosageprovidedagreaterrate ofincrease in thediameter of thesabiáplants. The number of ácarosinthe topsoil(0.0 to 5.3 cm) was lower than that obtainedin thesubsequentlayer(5.3 to 10.6). Thephosphorusalong withorganicgrowthwasbeneficial forplant heightinsabiá.