Crescimento inicial, níveis críticos de fósforo e frações fosfatadas em espécies florestais

Fernandes, Luiz Arnaldo; Neto, Antônio Eduardo Furtini; Fonseca, Fernando; Vale, Fabiano Ribeiro do

doi:10.1590/s0100-204x2000000600016

Cited by 43 publications

(45 citation statements)

References 11 publications

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“…That happens because under conditions of low availability of phosphorus the plant allocates greater growth potential to the root system (Soares et al, 2007). Fernandes et al (2000) observed a greater production of SDM in relation to RDM in seedlings of aroeirinha (Schinus terenbinthifolius Raddi), paineira (Chorisia speciosa A.St.-Hil.) andjambolão (Syzygium jambolanum (Lam.)…”

Section: Discussionmentioning

confidence: 93%

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EFFECT OF PHOSPHATE FERTILIZATION AND BASE SATURATION OF SUBSTRATE ON THE SEEDLINGS GROWTH AND QUALITY OF Plathymenia foliolosa Benth.

et al. 2017

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-This study aimed to evaluate the growth and quality of seedlings of Plathymenia foliolosa Benth in response to base saturation of substrate and phosphate fertilization. The treatments were arranged in a factorial design of 6 P levels (0, 120, 240, 360, 480 and 600 mg dm -3 ) by 5 base saturation levels (3.5, 25, 40, 55, 70 %), in randomized blocks with four replications. The height of aerial part, neck diameter, shoot dry matter, root dry matter and total dry matter were determined at 118 days after the transplanting. It was still calculated the relation shoot dry matter/root dry matter and the Dickson Quality Index. There were significant effects of the phosphate fertilization for all studied variables. The base saturation had influence on all studied variables, except for the shoot dry matter/root dry matter relation. No significant effect of the interaction between base saturation of substrate and phosphate fertilization was observed on seedlings growth and quality. For the studied conditions, it is recommended 300 mg dm -3 of P for the production of quality seedlings of Plathymenia foliolosa without the necessity of liming.Keywords: Phosphorus; Seedlings Production; Liming. EFEITO DA ADUBAÇÃO FOSFATADA E SATURAÇÃO POR BASES DO SUBSTRATO SOB O CRESCIMENTO E A QUALIDADE DE MUDAS DEPlathymenia foliolosa Benth. RESUMO -O objetivo deste estudo foi avaliar o crescimento e a qualidade de mudas de Plathymenia foliolosaBenth. (vinhático-da-mata) em resposta à adubação fosfatada e saturação por bases do substrato. Os tratamentos foram representados por um fatorial de seis níveis de fósforo (0, 120, 240, 360, 480 e 600 mg dm -3 ) por cinco níveis de saturação por bases do substrato (3,5, 25, 40, 55, 70%), sendo dispostos no delineamento em blocos ao acaso, com quatro repetições. Aos 118 dias após a repicagem, foram obtidas a altura da parte aérea (H), o diâmetro do coleto (D), a massa de matéria seca da parte aérea (SDM), de raízes (RDM) e total (TDM), e calculada a relação SDM/RDM e o índice de qualidade de Dickson (DQI). A adubação fosfatada teve efeito significativo para todas as variáveis estudadas. O efeito da saturação por bases também foi significativo, exceto para a SDM/RDM. Não foi observado efeito significativo para a interação entre saturação por bases e adubação fosfatada. Para as condições estudadas, recomenda-se a aplicação de 300 mg dm -3 de P, sem necessidade de calagem, para a produção de mudas de vinhático-da-mata.Palavras-chave: Fósforo; Produção de mudas; Calagem.

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Section: Discussionmentioning

confidence: 93%

“…Given the current scenario, the priority of the recovery projects is to replant with native species the sites that have been degraded by mining, construction, construction of hydroelectric plant reservoirs, or even the use of land for agricultural purposes (Fernandes et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF PHOSPHATE FERTILIZATION AND BASE SATURATION OF SUBSTRATE ON THE SEEDLINGS GROWTH AND QUALITY OF Plathymenia foliolosa Benth.

et al. 2017

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“…em função do modelo linear ajustado que não permitiu a determinação do ponto máximo de crescimento. Fernandes et al (2000) ao avaliarem o crescimento inicial, níveis críticos de fósforo e frações fosfatadas nas espécies florestais aroeirinha, paineira e jambolão, conseguiram ajustar, equação quadrática em função das doses de P (que variaram entre 0 e 600 ppm), apenas para a matéria seca total, ao passo que para a matéria seca da parte aérea e matéria seca do sistema radicular, apenas conseguiram ajustar modelos lineares, o que esteve relacionado com o fato de as doses de P não serem suficientes para atingir a máxima produção. A única exceção foi para a espécie paineira o que, segundo os mesmos autores, sugere que a espécie seja eficiente nutricionalmente, uma vez que sua produção de biomassa foi mais elevada do que as demais espécies em função das doses de P.…”

Section: Resultsunclassified

Adubação fosfatada para a produção de mudas de mogno (Swietenia macrophylla King)

Santos

Tucci²,

Hara³

et al. 2008

Acta Amaz.

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RESUMOo mogno (Swietenia macrophylla King), pelo elevado valor comercial da sua madeira, é uma das espécies mais exploradas na Amazônia, sendo ameaçada de extinção por não haver renovação dos estoques através de reflorestamento com a espécie. o objetivo deste trabalho foi avaliar o efeito da adubação fosfatada sobre o desenvolvimento de mudas de mogno. o estudo foi conduzidos em casa-de-vegetação e o solo utilizado para compor o substrato foi latossolo Amarelo de textura muito argilosa. os tratamentos constituiram-se de doses crescentes de fósforo de 0, 25, 30, 75, 100, 150 e 200 kg.ha -1 de P. o delineamento experimental foi o de blocos casualizados com 4 repetições, num total de 28 parcelas. Cada parcela foi formada por 2 mudas, cultivadas em sacos com capacidade de 4 dm 3 . verificaram-se respostas positivas às doses de fósforo para todas as características de crescimento, bem como na absorção da maioria dos macronutrientes. Para as características de crescimento a dose de 200 kg.ha -1 de fósforo, foi a que proporcionou máximo crescimento para as mudas de mogno, no intervalo de 90 dias.PalavRaS-chavE: Mogno, fertilidade do solo, fertilizante, fósforo Phosphated fertilization to produce mohogany seedlings (Swietenia macrophylla King)aBSTRacT Due to the high value of mohogany woods (Swietenia macrophylla King), this specie is one of the most explored in the Amazon region. that explains the reason why mahogany is almost extinct.the present work evaluates the effect of phosphated fertilization on the mahogany seedlings under the increased doses of phosphorus. the experiment happened in a greenhouse and the soil used to compose the substratum was a yellow oxisoil with a very argillaceous texture. the treatments were made by doses of P: 0, 25, 30, 75, 100, 150 and 200 kg.ha -1 of P the experimental design consisted of four randomized blocks, for a total of 28 parcels. Each parcel was formed by 2 seedlings, cultived in bags with 4 dm 3 of soil. it was noticed positive answers by seedlings cultivated species for all the biometric characters analyzed and, in the same way, for the contents of almost the analyzed nutrients. For the growth characteristics, 200 kg.ha -1 was the dose that provided the high growth for mohogany, on the interval of 90 days.

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“…On the other hand, some plants do not respond to irrigation or fertilization, as is the case of pequi (Alves . In addition, tree species have nutrient demand variation depending on the species, development stage and climatic conditions (Fernandes et al, 2000).…”

Section: Ntroductionmentioning

confidence: 99%

African Mahogany Submitted to Drip Irrigation and Fertilization

et al. 2017

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African mahogany (Khaya ivorensis A. Chev.) is a tree species that has been increasing in Brazilian commercial planting. However, the lack of water and nutrition are great obstacles for crop production. The aim of this study was to evaluate the growth of young mahogany plants submitted to drip irrigation and topdressing. The experimental design was of randomized blocks, with three repetitions in subdivided plots. Treatments consisted of drippers: 1, 2 and 3plt-1; flows: 2, 4 and 8L h-1, and a treatment without irrigation. For topdressing, subplots levels were, as follows: 1) 17.5 and 25.2; 2) 35.1 and 50.1; 3) 52.5 and 75.0; 4) 70.0 and 100.2; and 5) 87.5 and 125.1 g plant-1 N and K2O, respectively, divided into five bimonthly applications, which started in the 4th month after planting. Plant height, diameter at root collar and at breast height (DBH), and stem height were evaluated. Results showed statistically significant differences (P>0.05) between irrigated and non-irrigated plants. Mean plant height ranged (from 2 to 20 months in field) from 0.33 to 3.25 and 2.67m for irrigated and non-irrigated plants, respectively. Mean stem height ranged from 0.23m to 0.87 and 0.71m for irrigated and non-irrigated plants, respectively. Thus, irrigation with 1 dripper per tree and flow of 2L h-1 was able to supply mahogany water requirements in the first two years in field. Trees have not responded to N and K topdressing at the beginning of the cycle.

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Crescimento inicial, níveis críticos de fósforo e frações fosfatadas em espécies florestais

Cited by 43 publications

References 11 publications

EFFECT OF PHOSPHATE FERTILIZATION AND BASE SATURATION OF SUBSTRATE ON THE SEEDLINGS GROWTH AND QUALITY OF Plathymenia foliolosa Benth.

EFFECT OF PHOSPHATE FERTILIZATION AND BASE SATURATION OF SUBSTRATE ON THE SEEDLINGS GROWTH AND QUALITY OF Plathymenia foliolosa Benth.

Adubação fosfatada para a produção de mudas de mogno (Swietenia macrophylla King)

African Mahogany Submitted to Drip Irrigation and Fertilization

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