Efeito da luminosidade e da adição de nitrogênio no crescimento de plantas de Ilex paraguariensis St. Hil.

Mazuchowski, Jorge Zbigniew; Silva, Eduardo Teixeira da; Maccari, Agenor

doi:10.1590/s0100-67622007000400006

Cited by 10 publications

(7 citation statements)

References 4 publications

(2 reference statements)

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“…In the area of Lebon Régis, the treatment of 0-20 % cover showed plants with the greatest height when compared with the intermediate treatment (20-40 %), which did not differ from the treatment of 40-60 % cover. This behavior differs from the results reported by several authors (DA SILVA et al, 2007;MAZUCHOWSKI et al, 2007), which identified the greatest heights in seedlings exposed to intense shading. In these studies, the observed behavior is justified by a phenomenon known as Shade-avoidance Syndrome (SAS), as described by Ballaré (2014), when plants are exposed to shading conditions based on the response of photoreceptors, a series of reactions start and they result in the transcription of growth-promoting hormones.…”

Section: Yerba Matecontrasting

confidence: 99%

Effect of cover on the development and production of secondary compounds of Maytenus ilicifolia and Ilex paraguariensis in agroforestry systems

Borges

Boff²,

Mantovani³

et al. 2019

Ciênc. Florest.

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Effect of cover on the development and production of secondary compounds of Maytenus ilicifolia and Ilex paraguariensis in agroforestry systemsEfeito da cobertura do dossel no desenvolvimento e produção de compostos secundários de Maytenus ilicifolia e Ilex paraguariensis em sistemas agroflorestais AbstractThe Midwest regions of Santa Catarina state, in Brazil, include a great diversity of forest essences with medicinal application; however, many of these resources are poorly exploited or managed in an extractive manner. This research aimed to assess the effects of canopy cover in agroforestry systems on development and production of secondary composites of espinheira-santa (Maytenus ilicifolia) and yerba mate (Ilex paraguariensis). Two experimental areas were planted following the same spacing and arrangement for the plants. Experimental blocks were set up by pruning the pioneer plants, with three variable levels of canopy cover (0-20 %, 20-40 % and 40-60 %). Plants of espinheira-santa and yerba mate were monitored for development and their marketable vegetative parts were harvested, processed and aqueous extracts were prepared for the analysis of presence of secondary compounds. The yerba mate showed the highest production of marketable biomass under high cover. By contrast, the biosynthesis of the secondary compound, theobromine, was greater in the lowest cover, while chlorogenic acid and caffeine were higher in the cover (40-60 %). Espinheira-santa showed no difference in either development or yield among the assessment treatments and, the production of phenols was lower in the cover above 40 %.

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Section: Yerba Matecontrasting

confidence: 99%

Effect of cover on the development and production of secondary compounds of Maytenus ilicifolia and Ilex paraguariensis in agroforestry systems

Borges

Boff²,

Mantovani³

et al. 2019

Ciênc. Florest.

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“…They further state that that there is a nursery effect on survival and early growth of seedlings in the field. This behavior is in agreement with Lemos et al (2007) and Mazuchowski et al (2007), who suggest that the increased rate of stem elongation occurs in proportion to the level of shading. Morais et al (2003) found a greater height growth of the coffee (Coffea arabica L.) under shade of gandu (Cajanus cajan (L.) Millsp.…”

supporting

confidence: 93%

Seedling emergence of five varieties of citric rootstocks grown in environments with different levels of shading

Martins¹,

Coelho²,

Marçal³

et al. 2014

Plant Sci Today

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The emergence of citrus seedlings is influenced by several factors. One is the degree of brightness. The objective of the experiment was to evaluate the influence of four environments in the emergence of seedlings of five citrus varieties rootstocks. The work was carried out on private property located in the city of Alegre-ES, located at 20° 49' south latitude and 41° 32' west longitude and 322 m altitude. The experimental design was completely randomized in a split plot, with four rooms consisting of 0, 30, 50 and 80% shading in the plot and five varieties of rootstocks subplots, with four repetitions and twenty-five seeds per replicate. The rootstocks used were the Rangpur lime, lemon Volkameriano, Poncirus trifoliata, 'Swingle' citrumelo and Flying Dragon. After 60 days of sowing, emergence rate index, emergence percentage, leaf number and height were evaluated. At 124 days, leaf area, total chlorophyll (a + b), root dry mass and shoot were evaluated. The citric rootstocks tested responded differently when subjected to shading, and can use physiological and morphological mechanisms to maintain or even improve the emergence and seedling vigor. It was observed that the P. trifoliata rootstock obtained better performance when compared to others and that 50% shading can be adopted in this stage of citrus seedling production since it reduces seedling time in the tubes and does not affect the seedling quality.

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“…Cada compartimento foi posto em sacos de papel devidamente identificados, sendo estes levados à estufa de circulação forçada na temperatura de 60 °C até atingir peso constante (SILVA et al, 2007;RESENDE et al, 2011). Posteriormente, pesou-se o material em balança de precisão, para obtenção do peso da matéria seca.…”

Section: Methodsunclassified

Eficiência de conversão da radiação fotossinteticamente ativa interceptada em fitomassa de mudas de eucalipto

et al. 2012

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RESUMO -A produção de fitomassa é uma função da eficiência de conversão da radiação solar fotossinteticamente ativa interceptada em fotoassimilados, variando conforme as condições em que as plantas são cultivadas. Assim, este trabalho teve como objetivo quantificar a eficiência de conversão da radiação solar fotossinteticamente ativa interceptada em fitomassa -εb -de mudas de Eucalyptus grandis W. Hill ex Maiden (eucalipto) quando submetidas a diferentes tamanhos de tubetes e densidades de plantas. Para tanto, foi conduzido um experimento, em delineamento de blocos ao acaso, para estudar a produção de mudas em dois tamanhos de tubetes (pequeno e médio) e duas densidades de plantas na bandeja (alta com 100% de ocupação da bandeja e média com 50%), em que foram determinados a radiação fotossinteticamente ativa interceptada (RFAi), o índice de área foliar e a fitomassa seca total das mudas. O volume do tubete não interferiu nos valores de eficiência, mas, sim, a densidade de plantas, pois o índice de área foliar é quem determina tal valor. A εb foi de 7,33 g.MJ -1 em tubete médio e pequeno em densidade alta e de 3,26 g.MJ -1 em tubete médio e pequeno em densidade média.Palavras-chave: Ocupação da bandeja, Densidade de plantio e Radiação fotossinteticamente ativa. EFFICIENCY OF THE CONVERSION OF PHOTOSYNTHELICALLY ACTIVE RADIATION DRY BIOMASS IN EUCALYPTUS SEEDLINGS

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Efeito da luminosidade e da adição de nitrogênio no crescimento de plantas de Ilex paraguariensis St. Hil.

Cited by 10 publications

References 4 publications

Effect of cover on the development and production of secondary compounds of <i>Maytenus ilicifolia</i> and <i>Ilex paraguariensis</i> in agroforestry systems

Effect of cover on the development and production of secondary compounds of <i>Maytenus ilicifolia</i> and <i>Ilex paraguariensis</i> in agroforestry systems

Seedling emergence of five varieties of citric rootstocks grown in environments with different levels of shading

Eficiência de conversão da radiação fotossinteticamente ativa interceptada em fitomassa de mudas de eucalipto

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