Desenvolvimento vegetativo de porta-enxertos de citros produzidos em diferentes recipientes

Teixeira, Paulo de Tarso Lima; Schäfer, Gilmar; Souza, Paulo Vítor Dutra de; Todeschini, Abel

doi:10.1590/s0103-84782009005000122

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Plants in plastic tubes with a non-pruned radicular system may have reached their bases faster, thus, growth of the main root may have stopped and growth of secondary roots may have been stimulated. In citrus, for instance, when the main pivot root reaches the basis of the plastic tube, there is swelling in the apical region and root ramification, followed by subdivision of the radicular system, the so-called morphological anomalies, caused by root guidance to the basis of the tube, where roots end up being exposed to growth restrictions imposed by its walls (BALDASSARI et al, 2003;TEIXEIRA et al, 2009). Such phenomenon may be seen if pecan rootstocks are kept longer in their plastic tubes than the period proposed by the experiment.…”

Section: Resultsmentioning

confidence: 99%

Root pruning of pecan rootstocks in different containers

et al. 2022

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Quality pecan rootstocks that ensure genetic and phytosanitary safety, besides having good vegetative development, are extremely important to implant a successful orchard. Rootstocks with vigorous radicular systems affect plant growth. This study aimed at evaluating rootstock growth as the result of root pruning and the use of different containers to grow pecan rootstocks in an organic system. The experiment was conducted with “Barton” rootstocks in the experimental area at the Embrapa Clima Temperado in Pelotas, RS, Brazil, in 2018, 2019 and 2020. Rootstocks were evaluated in plastic bags and tubes and in the soil, associated with root pruning. Evaluation 280 and 480 days after transplant comprised the following: height of the aerial part, length of primary and secondary radicular systems, stem diameter, leaf area, dry mass of the aerial part, dry mass of the radicular system, dry mass of secondary roots and the Dickson Quality Index. The use of plastic bags to produce pecan rootstocks was found to coil roots at the bottom of the container. Neither containers nor root pruning affected stem diameter, an important parameter to carry out grafting. Pecan rootstocks with a non-pruned radicular system grown in plastic bags developed large main root and aerial part. Pruning of pecan radicular systems in containers and in the soil leads to increase in the number of main roots but decreases root length.

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Section: Resultsmentioning

confidence: 99%

Root pruning of pecan rootstocks in different containers

et al. 2022

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Produção De Mudas De Citros Com Diferentes Combinações Copa E Porta-Enxerto Em Viveiro Protegido

et al. 2016

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RESUMO O objetivo deste trabalho foi avaliar a produção de mudas de laranjeiras doces ‘Pera’ e ‘Westin’, tangerineira-tangor ‘Piemonte’ e limeira-ácida ‘Tahiti’ enxertadas em 14 porta-enxertos de citros em viveiro protegido. As mudas de laranjeiras-doces ‘Pera D-6’ e ‘Westin’, tangerineira-tangor ‘Piemonte’ e limeira-ácida ‘Tahiti CNPMF-02’ foram avaliadas em viveiro protegido após a enxertia, em 11 porta-enxertos híbridos: citrandarins ‘Indio’, ‘Riverside’ e ‘San Diego’, citrumelo ‘Swingle 4475’, HTR-051, TSKC x (LCR x TR)-040 e 059, LVK x LCR-010 e 038, TSKC x CTTR-002 e TSKC x CTSW-041, além de trifoliata ‘Flying Dragon’, limoeiro ‘Cravo Santa Cruz’ e tangerineira ‘Sunki Tropical’. Coletaram-se variáveis biométricas e fisiológicas, sendo o delineamento experimental em blocos ao acaso, em parcelas subdivididas, com 56 tratamentos, três repetições e dez plantas na parcela. Independentemente do porta-enxerto, a limeira-ácida ‘Tahiti CNPMF-02’ foi a copa mais vigorosa em viveiro, seguida da tangerineira-tangor ‘Piemonte’ e, por fim, pelas laranjeiras ‘Pera-D6’ e ‘Westin’. A tangerineira ‘Sunki Tropical’ induziu maior crescimento vegetativo e de sistema radicular em combinação com todas as copas estudadas. O trifoliata ‘Flying Dragon’ e o híbrido HTR-051 necessitam de maior período para a formação das mudas em função do menor vigor desses genótipos, em combinação com todas as variedades copas avaliadas. Não se observaram quaisquer sintomas de incompatibilidade entre as variedades no viveiro.

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Method to evaluate the efficiency of manual overhead irrigation in citrus rootstock liner production

et al. 2016

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Brazil produces grafted citrus seedlings in closed screen houses to reduce pest and disease incidence. Irrigation is usually performed by hand using either breaker nozzles or drilled polyvinyl chloride (PVC) pipe wands on garden hoses. Rootstocks are produced in cone-shaped containers filled with soilless potting mix. Since the containers have a small upper diameter, nutrient solution capture is reduced with the potential to cause environmental contamination from inefficient fertigation. This study provides a method to assess the efficiency of manual overhead irrigation systems used in liner production. The method consists of determining both the volume of water applied and volume lost (i.e., directly and by percolation) in order to obtain an estimate of the percentage of water loss, irrigation efficiency, and the drainage fraction. The method was tested in a commercial facility under standard production practices. The method's attributes included simplicity, quick sampling and data collection, and accuracy. The evaluated nursery was found to have low irrigation efficiency (27.14%) and excessive nutrient solution losses (72.86%). Considering an average production of 300,000 liners per year on 20,000 m 2 , we determined an annual solution loss of 221.8 m 3 with an average environmental release of 158.9 kg of fertilizer. Therefore, more efficient irrigation systems are necessary for sustainable citrus rootstock liners production.

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Desenvolvimento vegetativo de porta-enxertos de citros produzidos em diferentes recipientes

Abstract: II Desenvolvimento vegetativo de porta-enxertos de citros produzidos em diferentes recipientes

Cited by 3 publications

References 7 publications

Root pruning of pecan rootstocks in different containers

Root pruning of pecan rootstocks in different containers

Produção De Mudas De Citros Com Diferentes Combinações Copa E Porta-Enxerto Em Viveiro Protegido

Method to evaluate the efficiency of manual overhead irrigation in citrus rootstock liner production

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