EFEITO DA PLANTA MATRIZ, ESTAÇÃO DO ANO E AMBIENTE DE CULTIVO NA MINIESTAQUIA DE Pinus radiata

Corrêa, Paula Rachel Rabelo; Schultz, Bruno; Auer, Celso Garcia; Higa, Antônio Rioyei

doi:10.5380/rf.v45i1.32793

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Several factors affect the quality of forest cuttings and minicuttings, mainly the physicochemical characteristics of the substrate (Silva et al, 2012;Kratz et al, 2015), besides climatic characteristics, particularly regarding rooting and root vigor (Corrêa et al, 2015). Due to its production steps, the definition of an ideal substrate for clonal propagation is not always simple.…”

Section: Introductionmentioning

confidence: 99%

Quality of clonal plants of Piptocarpha angustifolia in different renewable substrates and seasons of the year

Stuepp

Wendling

Koehler

et al. 2016

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of different compositions of renewable substrates and seasons of the year on the quality of Piptocarpha angustifolia clonal plants. The experiment was carried out in a completely randomized design in a 4x6 factorial arrangement (four seasons x six substrate compositions). The analyzed substrates were: S1, commercial substrate with pine bark and coconut fiber base (CF); S2, carbonized rice husk (CRH); S3, fibrous and grainy CF; S4, 50% CF and 50% CRH; S5, 30% CF and 70% CRH; and S6, 70% CF and 30% CRH. Minicuttings of 8±1 cm were planted in tubes of 110 cm 3 and placed in a greenhouse, during the four seasons of the year. The evaluated variables were: survival and number of roots at 70 days; survival and emission of shoots at 100 days; rooting, shoot height, stem diameter, and their ratios; easiness of removal from tubes; aggregation to the substrate; and multiplication rate at 130 days. The highest CRH/CF ratio favored the development of better-quality plants, and S5 was the most adequate substrate. Spring is more favorable to the survival and quality of cuttings, and, together with summer, favors the highest multiplication rates. The S5 substrate has better physical and chemical quality and improves P. angustifolia clonal plants.Index terms: agro-industrial residues, clonal forestry, forest plant quality, production of minicuttings, "vassourão-branco". Qualidade de mudas clonais de Piptocarpha angustifolia em diferentes substratos renováveis e estações do anoResumo -O objetivo deste trabalho foi avaliar o efeito de diferentes composições de substratos renováveis e estações do ano na qualidade de mudas clonais de Piptocarpha angustifolia. O experimento foi conduzido em delineamento inteiramente casualizado, em arranjo fatorial 4x6 (quatro estações do ano x seis composições de substratos). Os substratos avaliados foram: S1, substrato comercial à base de casca de pinus e fibra de coco (FC); S2, casca de arroz carbonizada (CAC); S3, FC fibrosa e granulada; S4, 50% FC e 50% CAC; S5, 30% FC e 70% CAC; e S6, 70% FC e 30% CAC. Miniestacas de 8±1 cm foram plantadas em tubetes de 110 cm 3 e acondicionadas em casa de vegetação, nas quatro estações do ano. Avaliaram-se as variáveis: sobrevivência e número de raízes aos 70 dias; sobrevivência e emissão de brotos aos 100 dias; enraizamento, altura da parte aérea, diâmetro do coleto e suas relações; facilidade de retirada dos tubetes; agregação ao substrato; e taxa de multiplicação aos 130 dias. A maior relação CAC/FC favoreceu o crescimento de mudas com melhor qualidade, e S5 foi o substrato mais adequado. A primavera é mais favorável à sobrevivência e à qualidade das mudas e, juntamente com o verão, favorece as maiores taxas de multiplicação. O substrato S5 apresenta melhor qualidade física e química e proporciona melhores mudas clonais de P. angustifolia.Termos para indexação: resíduos agroindustriais, silvicultura clonal, qualidade de mudas florestais, miniestaquia, vassourão-branco.

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Section: Introductionmentioning

confidence: 99%

Quality of clonal plants of Piptocarpha angustifolia in different renewable substrates and seasons of the year

Stuepp

Wendling

Koehler

et al. 2016

Pesq. agropec. bras.

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Propagação vegetativa de Juniperus chinensis

et al. 2015

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Juniperus chinensis L. var. kaizuka, belonging to the Cupressaceae family and known as kaizuka is a species widely used in landscaping, being different from the other varieties of the species mainly because of its tortuous growth habits. The sexual reproduction of Juniperus chinensis has disadvantages and its propagation by cuttings can facilitate the production of seedlings. Thus, this study aimed to evaluate the effect of three different concentrations of the synthetic auxin indolebutyric acid (0, 1500 and 3000 mg L-1) to promote rooting of Juniperus chinensis var. kaizuka, collected in the basal (0.5 to 2.0 m), middle (2.1 to 3.5 m) and apical (3.6 to 5.0 m) portions of the stock plant, during winter, spring and autumn of 2012, with the intent to subsidize the development of a propagation protocol for the species. After 140 days in the greenhouse, it was observed that choosing the proper season to collect cuttings is essential for the viability of vegetative propagation technique for Juniperus chinensis var. kaizuka, with the recommendation of spring as the more suitable season for rooting development. However, although the application of AIB and the collection height in the stock plant have shown significant effects on some variables, it wasn’t observed a standard, related to these factors, producing a greater induction of the radicial system of the species.

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EFEITO DA PLANTA MATRIZ, ESTAÇÃO DO ANO E AMBIENTE DE CULTIVO NA MINIESTAQUIA DE Pinus radiata

Cited by 2 publications

References 5 publications

Quality of clonal plants of Piptocarpha angustifolia in different renewable substrates and seasons of the year

Quality of clonal plants of Piptocarpha angustifolia in different renewable substrates and seasons of the year

Propagação vegetativa de Juniperus chinensis

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