Desenvolvimento de larenjeira 'Pera' Citrus Sinensis (L.) Osbeck enxertada em limoeiro 'Cravo' (Citrus Limonia) e cultivada em pó de balsalto
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Data
2011-06-29
Autores
Lourenço Junior, Benedito Aparecido [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
A nutrição mineral constitui um dos aspectos mais críticos na produção de mudas. Os nutrientes quando fornecidos aos vegetais em dosagens adequadas e equilibradas entre si, possibilitam incrementos de produtividade. Apesar da utilização atual de pó de basalto como fonte alternativa de nutrição, ainda são poucos os estudos com base científica, que avaliem e comparem seus efeitos no desenvolvimento vegetal. O presente estudo objetivou avaliar a translocação orgânica, produtividade e a anatomia foliar da laranjeira Pêra‟ Citrus sinensis (L.) Osbeck enxertadas em limoeiro „Cravo‟ Citrus limonia e cultivadas com variação da fertilização e pó de basalto. O delineamento experimental foi inteiramente ao acaso, com seis repetições, em esquema fatorial 6 x 5, ou seja, 6 tratamentos constituídos por diferentes níveis de basalto em adição à fertilização, e cinco épocas de colheitas, realizadas aos 60, 90, 120, 150 e 180 após a enxertia, onde foi mensurado nº de folhas, diâmetro do caule, altura, massa de matéria seca de folha, caule, raiz e total, além do cálculo dos índices fisiológicos razão de área foliar (RAF), área foliar específica (AFE), taxa de crescimento relativo (TCR), taxa de assimilação líquida (TAL) e razão de massa foliar (RMF). Aos 180 dias após a enxertia e 170 dias de plantio em campo, foram realizadas análises de teores foliares de minerais. Foram mensuradas as trocas gasosas com o auxílio de um sistema aberto portátil de fotossíntese (LI-6400, LI-COR, Lincoln, NE, USA) nas plantas aos 170 dias após o plantio e avaliação anatômica do limbo e nervura foliar principal. De maneira geral, as plantas cultivadas com 36 kg de pó de basalto m-³ de substrato e 2∕3 da fertilização apresentaram desenvolvimento semelhante...
The mineral nutrition is one of the most critical in the production of seedlings. Nutrients to plants when supplied in adequate dosages and balance one another, allow increased productivity. Despite the current use of basalt powder as an alternative source of nutrition, there are few scientific studies that evaluate and compare their effects on plant development. This study aimed to evaluate the translocation organic productivity and leaf anatomy of the Sweet Orange „Pêra‟ Citrus sinensis (L.) Osbeck grafted on Rangpur Lime Citrus limonia cultivated with basalt powder. The experimental design was completely randomized design with six replications in a factorial 5 x 6, or 6 treatments consisting of different levels of basalt in addition to fertilization, and five harvests, performed at 60, 90, 120, 150 e 180 after grafting, when leaf number, stem diameter, height, and leaf, stem, root and total dry matter for growth analysis were measured. At 180 days after grafting and 170 days of planting, were analyzed mineral content in leaves. Gas exchange was evaluated through a closed portable photosynthesis system (LI-6400, LI-COR, Lincoln, NE, USA) on plants 170 days after planting and anatomical assessment of the limbus and the main leaf vein. In general, the plants cultivated with36 kg of basalt powder m-³ and 2∕3 of the fertilization showed development similar or higher in those grown without basalt powder. Anatomical changes can result in greater resistance in the field
The mineral nutrition is one of the most critical in the production of seedlings. Nutrients to plants when supplied in adequate dosages and balance one another, allow increased productivity. Despite the current use of basalt powder as an alternative source of nutrition, there are few scientific studies that evaluate and compare their effects on plant development. This study aimed to evaluate the translocation organic productivity and leaf anatomy of the Sweet Orange „Pêra‟ Citrus sinensis (L.) Osbeck grafted on Rangpur Lime Citrus limonia cultivated with basalt powder. The experimental design was completely randomized design with six replications in a factorial 5 x 6, or 6 treatments consisting of different levels of basalt in addition to fertilization, and five harvests, performed at 60, 90, 120, 150 e 180 after grafting, when leaf number, stem diameter, height, and leaf, stem, root and total dry matter for growth analysis were measured. At 180 days after grafting and 170 days of planting, were analyzed mineral content in leaves. Gas exchange was evaluated through a closed portable photosynthesis system (LI-6400, LI-COR, Lincoln, NE, USA) on plants 170 days after planting and anatomical assessment of the limbus and the main leaf vein. In general, the plants cultivated with36 kg of basalt powder m-³ and 2∕3 of the fertilization showed development similar or higher in those grown without basalt powder. Anatomical changes can result in greater resistance in the field
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Frutas citricas - Cultivo, Enxertia, Basalt powder, Mineral nutrition
Como citar
LOURENÇO JUNIOR, Benedito Aparecido. Desenvolvimento de larenjeira 'Pera' Citrus Sinensis (L.) Osbeck enxertada em limoeiro 'Cravo' (Citrus Limonia) e cultivada em pó de balsalto. 2011. 80 f. Dissertaçao (mestrado) - Universidade Estadual Paulista, Instituto de Biociências de Botucatu, 2011.