Evalution of organic substrates for the production of black acacia (Acacia mearnsii of Wild) seedlings.

O presente trabalho teve como objetivo avaliar a produ????o de mudas de ac??cia negra (Acacia mearnsii De Wild), em substratos obtidos a partir de res??duos agroindustriais, compostados e vermicompostados. Ap??s a busca e a aquisi????o dos diferentes res??duos utilizados no trabalho, procedeu-se ?? disposi????o desses materiais isolados e em combina????o em caixas de madeira n??o arom??tica (cedrinho) a fim de realizar o processo de compostagem e posteriormente a vermicompostagem. Ap??s a vermicompostagem estar conclu??da procedeu-se a mistura dos materiais incluindo-se a casca de arroz carbonizada (CAC) que compuseram os seguintes tratamentos: T1(esterco bovino (EB) 50%+ casca de arroz parboilizado (CAC) 50%); T2(esterco ovino (EO) 50%+CAC 50%); T3(restos da agroindustria (RA) 50%+CAC 50%); T4(lodo de arroz parborizado (LP) 50%+CAC 50%); T5(esterco bovino (EB) 25%+LP 25%+CAC 50%); T6(EO 25%+LP 25%+CAC 50%); T7(EB 25%+RA 25%+CAC 50%; T8- EO 25%+RA 25%+CAC 50%); T9(EB 25%+RF 25%+CAC 50%); T10(EO 25%+RF 25%+CAC 50%) e T11(Plantmax??). As vari??veis avaliadas foram: di??metro de colo, altura de plantas, fitomassa fresca da parte a??rea, fitomassa fresca da raiz, fitomassa seca da parte a??rea, fitomassa seca da raiz, ??rea foliar total, composi????o qu??mica das mudas e dos diferentes substratos antes e ap??s a retirada das mesmas. A semeadura ocorreu no dia primeiro de junho de 2006 em tubetes r??gidos (1320 unidades) com capacidade de acondicionar aproximadamente 50 cm3 de substrato. O processo germinativo foi conclu??do no dia 25 do mesmo m??s. Quando as mudas atingiram a altura de dois cent??metros, procedeu-se o desbaste, deixando-se apenas uma muda por recipiente. Durante o experimento as mudas foram irrigadas com a freq????ncia de 6L m-2 dia-1, at?? os 45 dias do plantio. A partir dos 46 dias mudou-se para duas irriga????es totalizando 12L m-2 dia-1, devido ?? eleva????o da temperatura local mantendo-se essa freq????ncia at?? o final das avalia????es em estufa. Aos vinte e tr??s dias do m??s de setembro de 2006 (115 dias a contar da semeadura), deu-se o t??rmino das avalia????es em estufa e todas as mudas foram retiradas e encaminhadas ao laborat??rio para serem realizadas as demais avalia????es. Os resultados obtidos foram submetidos ?? an??lise de vari??ncia, teste de m??dias (Tukey 5%), onde foi poss??vel constatar que o tratamento T11 com substrato comercial Plantmax??, apresentou as melhores respostas agron??micas para mudas de ac??cia negra (ac??cia mearnsii de Wild).The present work had as objective to evaluate the production of seedlings of black wattle (Acacia mearnsii of Wild), in substrata gotten from agro-industrial residues, composted and vermicomposted. After the search and the acquisition of the different residues used in the work, it was proceeded the disposal from these isolated materials and in not aromatical combination in boxes wooden (cedrinho) in order to carry through the composting process later and the vermcomposting. After the vermicomposting to be concluded preceded it mixture from the materials including itself it carbonized rind of rice (CAC). The treatments were: T1 (bovine manure (EB) 50%+ rind of parboilizado rice (CAC) 50%); T2 (ovine manure (EO) 50%+CAC 50%); T3 (agroindustrial residues (FROG) 50%+CAC 50%); T4 (mud of parborizado rice (LP) 50%+CAC 50%); T5 (bovine manure(EB) 25%+LP 25%+CAC 50%); T6 (EO 25%+LP 25%+CAC 50%); T7 (EB 25%+RA 25%+CAC 50%; T8- EO 25%+RA 25%+CAC 50%); T9 (EB 25%+RF 25%+CAC 50%); T10 (EO 25%+RF 25%+CAC 50%) and T11 (Plantmax??). The evaluated variable had been: number of plants, col diameter, height of plants, aboveground biomass (wet and dry), root fitomass (wet and dry), total foliar area, chemistry composition od seedlings and chemistry composition of the substrata before and after the research. The sowing occurred in rigid the first day of June of 2006 in tubetes (1320 units) with capacity conditioning 50 approximately cm3 of substratum. The seeds was concluded the germinative process in day 25 of the same month. When the changes had reached the height of two centimeters, proceded the looping, leaving itselves only one seedlings one for container. During the experiment the changes had been irrigated with the frequency of 6L m-2 day-1, until the 45 days of the plantation. From the 46 days 12L was changed for two irrigations totalizing m-2 day-1, due to rise of the local temperature remaining this frequency until the end of the evaluations in greenhouse. To the twenty and three days of the month of September of 2006 (115 days to count of the sowing), the ending of the evaluations in greenhouse was given and all the changes had been removed and directed to the laboratory to be carried through the too much evaluations. The gotten results had been submitted to the variance analysis, test of averages (Tukey 5%), where it was possible to evidence that the T11 treatment with commercial substratum Plantmax??, presented the best answers for seedlings of black wattle (ac??cia mearnsii of Wild)