Resposta de pinus taeda com diferentes idades à adubação NPK no Planalto Sul Catarinense

Moro, Luciana; Gatiboni, Luciano Colpo; Simonete, Marcia Aparecida; Cassol, Paulo Cézar; Chaves, Djalma Miler

doi:10.1590/s0100-06832014000400014

Cited by 25 publications

(10 citation statements)

References 13 publications

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“…The increment of height, diameter, number of folioles, dry matter and N content in the leaves of African mahogany plants due to higher applied dose of N, that ranged from 30.6% to 168.6% in relation to the control, showed the importance of nitrogen fertilization in the initial plant growth of the species. Similar results were obtained by Moro et al (2014) in Pinus taeda L., but they differed from those obtained by Tucci et al (2011) in plants of Swietenia macrophylla. It is known that N is one of the nutrients required in a higher quantity that performs structural actions in aminoacids, proteins, and photosynthetic pigments and especially takes part in the processes of photosynthesis, respiration, cell multiplication and differentiation (Marques et al, 2006).…”

Section: Discussionsupporting

confidence: 85%

Nitrogen Fertilization in the Initial Growth of Khaya senegalensis A. Juss Plants Under Greenhouse Conditions

Araújo¹,

Júnior²,

Barretto³

et al. 2019

JAS

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African mahogany is an exotic specie and its cultivation has increased in Brazil due to the high value of its timber on the international market. Nutrition with nitrogen is an important factor for species with high biomass production and specific studies on this species are essential. The present study aimed to assess the initial growth of African mahogany plants submitted to nitrogen fertilization. The experiment was set up and carried out in a greenhouse, with 7 dm3 plastic pots using a oxisoil sampled from the surface layer. A completely randomized experimental design was used with five treatments and six replications. The treatments consisted of five N levels: 0, 40, 80, 120 and 160 mg dm-3, using urea as the source. The following were assessed at 180 days: height, stem diameter, leaf, stem, root and total dry matter, N content in the leaves in the African mahogany leaves. The African mahogany seedlings had high N demand and responded positively to the N used and the growth variables was positive with increase in N level. However, as it presented increasing linear effect, the N level can not be estimated, that would provide the maximum initial development for this plant species.

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Section: Discussionsupporting

confidence: 85%

Nitrogen Fertilization in the Initial Growth of Khaya senegalensis A. Juss Plants Under Greenhouse Conditions

Araújo¹,

Júnior²,

Barretto³

et al. 2019

JAS

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“…In general, the growth rate of these species is not excessively compromised when no liming and fertilization are applied, particularly in the first rotations (Reissmann and Wisniewski, 2000). However, positive responses to fertilization were observed under different managements and in different environments (Muniz et al, 1975;Reissmann and Wisniewski, 2000;Ferreira et al, 2001;Moro et al, 2014;Coyle et al, 2016). Moreover, the nutrients exported by the crops must be replenished (Viera et al, 2011), which is a fundamental practice to reduce the environmental impact of any agricultural or forestry crop.…”

Section: Introductionmentioning

confidence: 99%

Tree Growth and Nutrient Dynamics in Pine Plantations in Southern Brazil

Filho

Schumacher

Neves

et al. 2017

Rev. Bras. Ciênc. Solo

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For the development of nutrient budget models to recommend lime and fertilizers for agricultural and forestry crops, curves of plant growth and nutrient accumulation are required. Information about how nutrients are partitioned between the different plant organs is also necessary, but still scarce for pine in Brazil. This study evaluated the growth, biomass partitioning, and nutrient dynamics in pine forests in southern Brazil. To this end, we assessed unthinned 2, 4, 6, and 8-year-old stands of Pinus taeda L. Three plots of 20 × 30 m per stand were delimited, in which three trees of different classes of diameter at breast height (DBH) were chosen. These trees were measured, felled, and the weight of their fresh components (leaves, branches, bark, and wood) was evaluated. Samples of each tree compartment and from the forest litter were taken to determine dry weight and nutrient content. From trees of the mean DBH class, the roots were also collected and the dry weight and nutrient contents determined. The same sampling procedure was carried out with soil for physical and chemical characterization. Regression models were adjusted to estimate growth, nutrient uptake, and nutrient use efficiency of pine trees, based on data collected in this and previous studies. The equations developed in this research can be used in nutrient budget models as well as in other simulation models, to establish recommendations of lime and fertilizers for Pinus taeda stands in southern Brazil.

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“…Décadas de estudos no Brasil mostram que as produtividades mais elevadas do P. taeda são encontradas em solos com maior teor de argila e mais férteis, destacando-se a capacidade de troca catiônica, fósforo e nitrogênio (BIZON, 2005;BOGNOLA et al, 2010;DEDECEK et al, 2008;LASO GARICOITS, 1990;MUNHOZ, 2011). Moro et al (2014), relata que a adição de macronutrientes aumentou o estoque de madeira em plantios com 5 e 9 anos de idade, sugerindo a adubação em plantios já estabelecidos como uma alternativa de manejo para aumentar a produtividade em solos de baixa fertilidade no sul do Brasil.…”

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“…Um dos principais fatores que direciona o tipo de manejo adotado para os plantios florestais é o retorno financeiro. A busca para encontrar o "manejo ideal" das áreas florestais, o qual considera não somente o ganho em produção de madeira mas também o custo-benefício do investimento em melhoramento genético e das atividades silviculturais, é tema de diversos estudos no manejo do Pinus taeda (CARTER;FORSTER, 2006;CARDOSO et al, 2013;CUBBAGE et al, 2007;MAESTRI;SANQUETTA, 1998 CARVALHO et al, 1999;DEDECEK et al, 2008;LASO GARICOITS, 1990;MORO et al, 2014;).…”

Section: Introductionunclassified

Influência dos fatores edafoclimáticos na produtividade e na eficiência do uso dos recursos naturais do <i>Pinus taeda</i> L. sob distintos manejos no Sul do Brasil

Munhoz¹

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Edaphoclimatic factors influence on productivity and efficiency use of natural resources of loblolly pine under different managements in southern Brazil Due to the improvement of silviculture practices and breeding for the selection of more productive genotypes, the loblolly pine productivity in Brazil is recognized as one of the biggest in the world. Even with the high productivity at certain sites, its variation is large. It is known that the availability of water, light and nutrients are essential for the wood production, and that the use efficiency of these resources influences the productivity variation. However, the absence of fertilization in pine plantations is majority in the commercial areas in Brazil due to good growth in low fertility soils and it hardly presents visual nutrient deficiency. To understand which factors influence the production and biomass partitioning, it is necessary to study the production ecology. Thus, the present work has as main objectives: i) to study the influence of different soil classes in loblolly pine growth; ii) to study the productivity response submitted to fertilization and thinning; iii) to evaluate the light interception; and iv) to estimate the growth efficiency (GE), use of light (LUE) and nitrogen (NUE) in loblolly pine stands in southern Brazil. For this study, it was used quadriplots from the experimental network of Pinus Potential Productivity in Brazil program, which composes an edaphoclimatic gradient in Parana and Santa Catarina states. The plots were submitted to the following treatments: control (C), fertilized (F), thinning (T), thinning and fertilized (TF). It was calculated the site index, the annual increment, the mean annual increment, the stand uniformity index, wood net primary productivity and the leaf area index (LAI). The soil (0-20 cm) and foliar analyzes were held. Data from the calculated climate variables was obtained from the closest weather stations to the evaluated sites. The minimum and maximum productivity of control plots were, respectively, 20.3 and 56.9 m³ ha-1 yr-1 with an average age of 13 years. There was a significant effect of F and TF treatments, with maximum gain in volume stock of 33 and 63%, respectively. The response of fertilization and fertilization with thinning occurred in less fertile areas and with lower soil organic matter content. The stands uniformity correlated positively with the basal area in 2014 and the GE, LUE and NUE calculated in 2013. The mean values of GE, LUE and NUE at the average age of 12,4 years were 2.1 Mg ha-¹ LAI-¹, 0.55 g MJ-¹ and 93 kg wood kg-¹ N year-¹, respectively. There was a positive linear relationship of GE, LUE and NUE with the production of total biomass above ground. The soil variables influenced more on the use efficiency of natural resources than climatic variables.

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Resposta de pinus taeda com diferentes idades à adubação NPK no Planalto Sul Catarinense

Abstract: RESUMO

Cited by 25 publications

References 13 publications

Nitrogen Fertilization in the Initial Growth of Khaya senegalensis A. Juss Plants Under Greenhouse Conditions

Nitrogen Fertilization in the Initial Growth of Khaya senegalensis A. Juss Plants Under Greenhouse Conditions

Tree Growth and Nutrient Dynamics in Pine Plantations in Southern Brazil

Influência dos fatores edafoclimáticos na produtividade e na eficiência do uso dos recursos naturais do <i>Pinus taeda</i> L. sob distintos manejos no Sul do Brasil

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