Avaliação de doses de polímero "hidratassolo" na produção de mudas de sabiá (Mimosa caesalpiniifolia Benth) sob diferentes frequências de irrigação, em dois solos do Cariri cearense

• Ano de defesa: 2006
• Autor(a) principal: GOMES, Eder Cardozo
• Orientador(a): MOURA, Ronaldo Freire de
• Banca de defesa: NOGUEIRA, Rejane Jurema Mansur Custódio, PASSOS, Marco Antônio Amaral, RODRIGUES, José Júlio Vilar, WICOX, Bradford Paul
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• dARK ID: ark:/57462/0013000005nzv
• Idioma: por
• Instituição de defesa: Universidade Federal Rural de Pernambuco
• Programa de Pós-Graduação: Programa de Pós-Graduação em Ciência do Solo
• Departamento: Departamento de Agronomia
• País: Brasil
• Palavras-chave em Português: Sabiá (vegetal); Produção de mudas; Mimosa caesalpiniifolia; Espadossolo; Latossolo
• Palavras-chave em Inglês: Spodossol; Polymer
• Área do conhecimento CNPq: AGRONOMIA::CIENCIA DO SOLO
• Link de acesso: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4934

A greenhouse experiment wasconducted in the Federal Agrotecnica School of Crato-CE, to evaluate the effect of increasing dosages of the polymer “hidratassolo” on the development of sabiá (Mimosa caesalpiniifilia Benth), on a carbic spodossol and red yellow latossol, with irrigation interval of 2, 8 and 16 days. A completely randomized experimental design, was used with seven treatments: “0,0”; “0,05”; “0,10”; “0,15”; “0,20”; “0,25” and “0,30” dag/kg of “hidratassolo” and two soils whith the, presence and absence of cow manure in factorial arrangement of 2x7x2, with five replicates. Simgle samples in the depth of 0 - 140 cm for cárbic spodossol and of 0 - 160 cm for red-yellow latossol were collected, forming a composed sample for the characterization of the soils. Seeds of sabiá were planted in polyetirene trays with 128 cells using the commercial substrate “Plantmax”. When approximately 8,0 cm tall, they were transplanted to plastic bags with a capacity of 3,0 kg. The temperature was monitored daily a 8:00 AM, averaging 20,38ºC for the minimum and 38,05ºC for the maximum. The measured air humidity was 28% for minimum and 80% for the maximum. The following variables were evaluated: plant height stem diameter, leaf number, and stem dry matter. The measurements were done at each interval of irrigation and variance analysis was run and the averages were compared by the Duncan test whith 5% of probability. In the two days interva treatment the spodossol provided a higher development of 12,68% in leaf number than that of the latossolo. In the absence of cow manure the dosages of “hidratassolo” of “0,20”, “0,25” and “0,30” showed higher average development of 28% in the leves dry mass in relation to the control. In the presence of cow manure the control was 21% and 34,41% higher than the second best dosage of “hidratassolo” of “0,05” dag/kg for the leaf and stem dry mass of the respectively. In the eight days irrigation interval the stem mass of the “hidratassolo” treatment in the presence of cow manure presented a better development than “hidratassolo” in the absence of cow manure specially for “the 0,30” and “0,25” dag/kg dosage of “hidratassolo” with 83,6% and 96,8% respectively. The best dosage of “hidratassolo”, in the absence of cow manure was “0,15” dag/kg, for the development of the stem mass, presenting a gain of 39,15% in relation to the control. In the sixteen days irrigation interval, in the absence of cow manure, the increased dosages of “hidratassolo” of “0,20”, “0,25” and “0,30”, caused a reduction in the leaf number in relation to the same dosages of “hidratassolo” in the presence of cow manure. Generally it was verified that high doses of “hidratassolo”, provoked a reduction in the development of the plants, specially in the absence of cow manure.