Resposta do coqueiro à adubação com uréia, superfosfato simples e cloreto de potássio em dois solos do nordeste do Brasil

Sobral, Lafayette Franco; Leal, M. L. S.

doi:10.1590/s0100-06831999000100011

Cited by 9 publications

(6 citation statements)

References 2 publications

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“…Houve redução na massa dos frutos e no número de frutos por cacho proporcional às doses de N. De outra forma, a aplicação de potássio aumentou a massa média dos frutos. Sobral & Leal (1999), diferentemente, observaram que tanto a aplicação de N como de K determinaram aumento significativo no número de frutos produzidos.…”

Section: Resultsunclassified

Adubação com NPK em coqueiro-anão-verde (Cocos nucifera L.) rendimento e qualidade de frutos

Teixeira¹,

Bataglia

Buzetti

et al. 2005

Rev. Bras. Frutic.

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A produção de coco para extração de água no Estado de São Paulo está em expansão. Entretanto, faltam informações básicas sobre o manejo desta cultura. Desse modo, instalou-se um experimento de campo em Pereira Barreto (20º47'S; 51º01'W), visando ao estudo da resposta do coqueiro à adubação com NPK de set/2000 a fev/2004. Empregou-se o esquema fatorial fracionado 1/2 (4³), sendo os tratamentos formados pelas combinações de doses anuais de N (0; 120; 240 e 360 kg ha¹ de N), P (0; 100; 200 e 300 kg ha¹ de P2O5) e K (0; 120; 240 e 360 kg ha¹ de K2O). Como fontes de N, P e K, respectivamente, aplicaram-se NH4NO3, superfosfato triplo e KCl, fracionadamente, durante a época das chuvas. A aplicação de N causou diminuição no volume de água e massa média dos frutos e na quantidade de frutos por cacho; inversamente, a adubação potássica teve efeito positivo nestas características. Os teores de P e K da água de coco aumentaram com a aplicação de P e K, entretanto não houve efeito dos tratamentos nos resultados da avaliação sensorial. A aplicação de P não teve efeito significativo na produção de frutos.

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Section: Resultsunclassified

Adubação com NPK em coqueiro-anão-verde (Cocos nucifera L.) rendimento e qualidade de frutos

Teixeira¹,

Bataglia

Buzetti

et al. 2005

Rev. Bras. Frutic.

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“…Although little assessed in plant nutrition studies, chlorine plays an essential role in photosynthesis and osmoregulation (MARSCHNER, 2012), which is more noticeable in plants from the family Areaceae (FERNANDES et al, 2002). Species of this family are tolerant to high salinity levels caused by Cl (FERNANDES et al, 2003), also their productive potential is increased when this micronutrient is supplied through fertilization (SOBRAL; LEAL, 1999). Common visual symptoms of Cl deficiency occur in more mature tissues due to chlorine mobility from tissues of residence to developing tissues and are related to growth reduction, wilting and premature senescence of leaves, generalized chlorosis and necrosis, as well as to root system atrophy (FAÇANHA;CANELLAS;DOBBS, 2008).…”

Section: Introductionmentioning

confidence: 99%

Symptoms of deficiency and growth of peach palm seedlings due to omission of macronutrients

Matos¹,

Fernandes²,

Carvalho³

2013

RCA

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Peach palm (Bactris gasipaes H.B.K.) presents multiple economic uses especially regarding its heart-of-palm production; however, this species nutritional requirement should be better elucidated. In this study, we evaluated the visual symptoms of micronutrient omission, dry matter yield and nutrient contents of peach palm plants. The study was carried out in a greenhouse with randomized block experimental design with four replicates. The following treatments were adopted: complete (macro and micronutrients); complete with individual omission of B, Cu, Fe, Mn, Zn and Cl. Visual symptoms of deficiency occurred in all omission treatments. Decrease in plant size and leaf morphological alterations were observed. Dry matter yield of leaves, stem, roots and total decreased approximately 50%, with major limitation caused by Cu and B; root/shoot ratio was (Fe > B > Zn = Cl > Mn > Cu > complete) and relative growth presented the order (complete > Mn > Cl > Zn > Fe > B > Cu). Foliar nutrient contents in complete solution were (Cl > Fe > Mn > Zn > Cu). Chlorine appeared to be important for peach palm development. The most limiting micronutrients were Cu and B. RESUMO: A pupunheira (Bactris gasipaes H.B.K.) apresenta múltiplos usos econômicos, destacando-se a produção de palmito; entretanto, a demanda nutricional da espécie ainda deve ser mais bem elucidada. Foram avaliados os efeitos das omissões de boro (B), cobre (Cu), ferro (Fe), manganês (Mn), zinco (Zn) e cloro (Cl) nos sintomas visuais, na produção de matéria seca e nos teores de nutrientes em plantas de pupunheira. O experimento foi realizado em casa de vegetação, utilizando-se mudas em vasos contendo soluções nutritivas. O delineamento experimental foi em blocos ao acaso, com quatro repetições. Os tratamentos foram: completo (macro e micronutrientes) e completo com omissão individual de B, Cu, Fe, Mn, Zn e Cl. Os sintomas visuais de deficiência se manifestaram para todos os tratamentos de omissão dos micronutrientes, permitindo-se constatar redução do porte das plantas e alterações morfológicas nas folhas. A produção da matéria seca de folhas, caule e raízes, e total reduziu-se cerca de 50% com a omissão dos micronutrientes, sendo a maior limitação ocasionada por Cu e B; a relação parte aérea/raiz foi Fe > B > Zn = Cl > Mn > Cu > completo; e o crescimento relativo apresentou a ordem completo > Mn > Cl > Zn > Fe > B > Cu. Os teores foliares em solução completa foram Fe > Mn > Zn > Cu > Cl. O Cl mostrou-se importante para o desenvolvimento da pupunheira. Os micronutrientes mais limitantes foram o Cu e o B.

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“…On the other hand, the mean P content was not changed in response to N rates and K (Figure 3), indicating that the P rate applied at the plant base was sufficient to meet the growing plant demand until the second year, with no dilution effect. Increasing N-P-K rates on coconut were tested, with no yield response to the P increase (Sobral and Leal, 2005). This suggests palms are little responsive to increasing P applications.…”

Section: Discussionmentioning

confidence: 97%

“…The continuous growth of coconut (Cocus nucifera L.) results in the removal of large quantities of nutrients that need to be replenished by fertilization (Sobral and Leal, 2005). The nutrients extracted from the soil at highest quantities by palms are mostly nitrogen and potassium (Pillai and Davis, 1963;Ouvrier, 1984;Corley and Tinker, 2003;Sobral and Leal, 2005). Ollivier et al (1999) evaluated the nutritional status of commercial coconut plantations in New Guinea and also identified N and K as the most yield-limiting elements of this palm tree.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitrogen and Potassium Rates on Early Development of Macaw Palm

Pimentel

Bruckner

Martínez

et al. 2015

Rev. Bras. Ciênc. Solo

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the economic exploitation of macaw palm [Acrocomia aculeate (Jacq.) lodd. ex mart.] is currently in transition, from extractivism to agricultural cultivation, thus requiring studies on the fertilization of the crop. this study evaluated the response of three genotypes of macaw palm to increasing rates of nitrogen and potassium, grown in the field until the 2 nd year and to establish reference contents of mineral nutrients in the leaf. the experiment was a split-plot randomized block design with five main treatments (N and K rates) and three secondary treatments (genotypes), with three replications, each plot containing three plants. Plant height, leaf number, vigor, and nutrient contents in leaf tissues were evaluated at the end of 2 nd year of cultivation. differential responses were observed among genotypes, indicating that some genotypes are more efficient in the use of mineral inputs. There was a differentiated and positive response to increasing side-dressed N and K rates in the vegetative development of macaw genotypes until the 2 nd year of field cultivation, indicating variability in the species in terms of nutrient use efficiency. The N and K fertilization rate corresponding to 360 g N + 480 g K 2 o per plant, in four split applications over the two years of cultivation, was insufficient to induce maximum vegetative development in the three macaw genotypes. there was no variation in macro-and micronutrient contents in leaf dry matter of the three macaw genotypes.

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Resposta do coqueiro à adubação com uréia, superfosfato simples e cloreto de potássio em dois solos do nordeste do Brasil

Abstract: RESUMO

Cited by 9 publications

References 2 publications

Adubação com NPK em coqueiro-anão-verde (Cocos nucifera L.) rendimento e qualidade de frutos

Adubação com NPK em coqueiro-anão-verde (Cocos nucifera L.) rendimento e qualidade de frutos

Symptoms of deficiency and growth of peach palm seedlings due to omission of macronutrients

Effect of Nitrogen and Potassium Rates on Early Development of Macaw Palm

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