Viabilidade do uso do sistema de blocos prensados na produ??o de mudas de tr?s esp?cies arb?reas nativas

• Main Author: Keller, Luciano
• Other Authors: Leles, Paulo Sergio dos Santos
• Format: Others
• Language: Portuguese
• Published: Universidade Federal Rural do Rio de Janeiro 2016
• Subjects: qualidade de mudas; inga; caroba; Ip?-felpudo.; seedlings quality; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::CONSERVACAO DA NATUREZA
• Online Access: https://tede.ufrrj.br/jspui/handle/tede/479

Made available in DSpace on 2016-04-28T14:56:19Z (GMT). No. of bitstreams: 1 2006 - Luciano Keller.pdf: 334126 bytes, checksum: 61f193dcc02e3911711ef2d11e41f545 (MD5) Previous issue date: 2006-04-27 === Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior === The objective was to evaluate the viability use of the system of blocks pressed for the production of seedlings of Inga marginata, Jacaranda puberula and Zeyheria tuberculosa. It was used as containers pressed block (440 cm3/ seedlings), plastic sacks (11x15 cm) and the tubetes of circular section (280 cm3). They were made evaluations of the seedlings, planting simulation in the nursery and definitive planting in the field in ciliary area to river Guand? s margins. It was used as substratum organic composition, ground coal and loamy soil, in the proportion volumetric, 6:2:2. For the making of the blocks, the substratum was moistened, put in metallic form with dimensions of: 60 x 40 x 20 cm (length, width and height) on a wood box with screen bottom (0,5 mm) and pressed by 15 minutes with a hydraulic monkey. After the presage, the blocks presented height of 12 cm. The seeds were sowed in sand and transplanted for the containers, selecting themselves plantules more homogeneous. The comparison was made by the characteristics of the produced seedlings and for his/her acting powder-planting in bags of 20 liters and in the field. At that time of expedition of the seedlings for the field (150 days after the sowing), the seedlings of the three studied species presented satisfactory growth, when produced in the system of blocks pressed unlike the seedlings produced in the tubetes, 150 days after the repicage. Seedlings of Jacaranda puberula produced in tubetes presented estiolation. That was not observed in seedlings of Inga marginata and Zeyheria tuberculosa. In condition of planting controlled seedlings of Inga marginata produced in tubetes presented smaller values of lap diameter and dry weight of the radicular system and seedlings of Jacaranda puberula produced in the pressed blocks presented smaller height values, lap diameter and dry weight of the radicular system, however that no repeating in the field. After the planting in the field mute of Jacaranda puberula produced in tubetes presented smaller survival taxes. There was not difference among the systems of production of the seedlings, when appraised the height and the diameter of lap of the plants 10 months after the planting. The system of pressed blocks was shown technically viable for the production of seedlings of native forest essences. === O objetivo do estudo foi avaliar a viabilidade uso do sistema de blocos prensados para a produ??o de mudas de Inga marginata, Jacaranda puberula e Zeyheria tuberculosa. Utilizou-se como recipientes bloco prensado (440 cm?/muda), sacos pl?sticos (330 cm3) e tubetes de se??o circular (280 cm3). Foram feitas avalia??es das mudas, simula??o de plantio no viveiro e plantio definitivo no campo em ?rea ciliar ?s margens do Rio Guandu, Serop?dica/RJ. Utilizou-se como substrato composto org?nico, moinha de carv?o e solo argiloso, na propor??o volum?trica, 6:2:2. Para a confec??o dos blocos, o substrato foi umedecido, colocado em forma met?lica com dimens?es de: 60 x 40 x 20 cm (comprimento, largura e altura) sobre uma caixa de madeira com fundo de tela (0,5 mm) e prensado por 15 minutos com um macaco hidr?ulico. Ap?s a prensagem, os blocos apresentaram altura de 12 cm. As sementes foram semeadas em areia e transplantadas para os recipientes, selecionando-se as pl?ntulas mais homog?neas. A compara??o foi feita pelas caracter?sticas das mudas produzidas e por seu desempenho p?s-plantio em sacolas de 20 litros e no campo. Na ?poca de expedi??o das mudas para o campo (150 dias ap?s a semeadura), as mudas das tr?s esp?cies apresentaram crescimento satisfat?rio, quando produzidas no sistema de blocos prensados ao contr?rio das mudas produzidas nos tubetes. Mudas de Jacaranda puberula produzidas em tubetes apresentaram estiolamento. Isso n?o foi observado em mudas de Inga marginata e Zeyheria tuberculosa. Em condi??es de plantio controlado mudas de Inga marginata produzidas em tubetes apresentaram menores valores de di?metro de colo e peso seco do sistema radicular e mudas de Jacaranda puberula produzidas nos blocos prensados apresentaram menores valores de altura, di?metro de colo e peso seco do sistema radicular, por?m isso n?o se repetiu no campo. Ap?s o plantio no campo as plantas de Jacaranda puberula produzidas em tubetes apresentaram menores taxas de sobreviv?ncia. N?o houve diferen?a entre os sistemas de produ??o das mudas, quando avaliada a altura e o di?metro de colo das plantas 10 meses ap?s o plantio. O sistema de blocos prensados mostrou-se tecnicamente vi?vel para a produ??o de mudas de ess?ncias florestais nativas.