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| Registros recuperados: 10 | |
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| Pereira,Natanael S; Alves Júnior,Antônio Roberto; Celedônio,Wilma F; Rodrigues,Esiana A; Chaves,Sérgio WP; Medeiros,José Francismar. |
| ABSTRACT Studies on nutrient uptake are important to understand nutritional needs of crops, which demand may also be influenced by fertilization management, particularly P fertilization. Thus, the aim of this study was to evaluate macronutrient accumulation and distribution in watermelon cv. Magnum, under two forms of phosphate fertilization. The experiment was carried out in a sandy-textured Argisol in Mossoró-RN. The experimental design was a randomized block design, arranged in split plot in time, with four replicates. We evaluated dose of 137 kg ha-1 of P2O5 under two forms of fertilization [pre-planting (F0) and pre-planting + topdressing (F1)]. Triple superphosphate (SFT) was used for pre-planting applications and topdressing applications were done... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrullus lanatus; Nutrient accumulation; Phosphorus. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300346 |
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| Dalastra,Cleiton; Teixeira Filho,Marcelo CM; Silva,Marcelo R da; Nogueira,Thiago AR; Fernandes,Guilherme Carlos. |
| ABSTRACT The optimum flow rate of nutrient solution in hydroponic system can better nourish the crops, allowing healthy and faster growth of lettuce. However, flow also interferes with electric power consumption, so further researches are necessary, mainly on the effect of flow rate, nutrient accumulation and lettuce production. In this context, the aim of this study was to evaluate nutrition and production of head lettuce in relation to the nutrient solution flow in NFT hydroponic system. The treatments consisted of nutrient solution application at the flow rates 0.5; 1; 2, and 4 liters per minute in each cultivation channel. Five replicates per treatment consisted of 15 plants each. The flow in hydroponic systems to produce head lettuce alters the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Foliar nutrients contents; Foliar diagnosis; Nutrient accumulation; NFT hydroponic system. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000100021 |
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| Magolbo,Luis Augusto; Carmo,Ezequiel Lopes do; Garcia,Emerson Loli; Fernandes,Adalton Mazetti; Leonel,Magali. |
| Abstract:The objective of this work was to evaluate the effect of nitrogen fertilization on the growth and yield of arracacha (Arracacia xanthorrhiza), as well as on the plant's nutrient uptake, distribution, and removal. The experiment was carried out in a typical Oxisol, with sandy texture. A randomized complete block design was used, with four replicates. The treatments consisted of five N rates: 0, 50, 100, 200, and 400 kg ha-1. The plots were composed of three 8-m-length rows, spaced at 0.60 m between rows and 0.40 m between plants. The plants were harvested after an 8-month cycle. Nitrogen fertilization significantly increased the proportion of N and S accumulated in stems, and of Ca, Mg, Fe, and Mn in leaves. N supply increased Zn distribution to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arracacia xanthorrhiza; Dry matter allocation; Nutrient accumulation; Nutrient concentration; Storage root. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000800669 |
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| Covre,André Monzoli; Partelli,Fábio Luiz; Bonomo,Robson; Tomaz,Marcelo Antônio; Ramalho,José Cochicho. |
| Abstract: The objective of this work was to evaluate the concentrations and accumulation of macronutrients in conilon coffee (Coffea canephora) fruit, and their concentrations in leaves, over two years, in irrigated and nonirrigated coffee plants. Three-year-old conilon coffee plants of the cultivar Emcapa 8111 genotype 02 were used. An experimental design was carried out in randomized complete blocks, in a split-plot arrangement, with 14 replicates. The main plot factor was irrigation versus nonirrigation of coffee plants, and the split-plot factor was different fruit and leaf collection times. Collections began 10 days after the beginning of flowering and were performed on average every 28 days, until full fruit ripening. At each sampling date, five... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffee; Mineral nutrition; Nutrient accumulation; Water deficit. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000901025 |
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| Catuchi,Tiago Aranda; Soratto,Rogério Peres; Francisquini Júnior,Amarildo; Guidorizzi,Fernando Vieira Costa; Tiritan,Carlos Sérgio. |
| Abstract: The objective of this work was to evaluate the nutrition, accumulation of nutrients in residual straw, pure seed yield, and seed quality of the tropical forage grasses 'Mombaça' and 'Xaraés' subjected to topdressing with nitrogen fertilizer management. Field experiments were carried out in the municipalities of Rancharia and Presidente Prudente, in the state of São Paulo, Brazil. The treatments included a control (without N topdressing) and four N fractionation forms at different forage stages: 150 kg ha-1 N, at the vegetative phase (VP); 150 kg ha-1 N, at the beginning of the reproductive phase (RP), between panicle initiation and the prebooting stages; 100 kg ha-1 N, at VP plus 50 kg ha-1 N at RP; and 50 kg ha-1 N at VP plus 100 kg ha-1 N at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Megathyrsus maximus; Urochloa brizantha; Nitrogen fertilization; Nutrient accumulation; Time of application. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102501 |
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| Crusciol,Carlos Alexandre Costa; Carmeis Filho,Antonio Carlos de Almeida; Fernandes,Adalton Mazetti; Alvarez,Rita de Cássia Félix. |
| ABSTRACT Upland rice cultivars manifest different nutritional demands. A field study was conducted to quantify the extraction, distribution, and removal of micronutrients and silicon by the upland rice cultivars. The experiment was arranged in a randomized complete block-split plot design. Plots consisted of three cultivars (Caiapó – traditional, BRS Primavera – intermediate, and Maravilha – modern) of upland rice. Split-plots consisted of plant samplings, which occurred at 39, 46, 55, 67, 75, 83, 92, 102, 111, 118, and 125 days after emergence (DAE). Up to the end of tillering (46 DAE), all cultivars exhibited low demand for most micronutrients and Si, and took up less than 24 % of the total B, Cu, and Si, but around 31 % of the total Zn. The period of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Nutrient accumulation; Uptake rates; Nutritional requirement. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100522 |
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| Vieira,José Luís Vilela; Nardi,Kaue Tonelli; Silva,Gabriel Rodrigues Anastácio; Moreira,Lílian Angélica; Zavaschi,Eduardo; Moura,Thiago Augusto; Otto,Rafael. |
| ABSTRACT: Determining nutrient uptake and accumulation rates by cotton crops is important to define management strategies, especially for transgenic varieties, which are cultivated using high-technology approaches that require substantial investment to maximize yield. Currently in Brazil, the states of Bahia and Mato Grosso are responsible for 84.4 % of the total cotton growing area. In the present study, two trials were conducted in 2013, one that involved planting FM 940 GLT, FM 980 GLT, and FM 913 GLT varieties in the state of Bahia and the other which involved FM 940 GLT and FM 980 GLT varieties in the state of Mato Grosso. The aim of the two trials was to represent the two regions that currently encompass the largest areas of cotton cultivation.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum; Nutrient accumulation; Cotton nutrition; Uptake rate. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100506 |
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| Ros,Clovis Orlando Da; Matsuoka,Marcia; Silva,Rodrigo Ferreira da; Silva,Vanderlei Rodrigues da. |
| ABSTRACT The distribution of phosphorus (P) in the soil interferes with the availability of the nutrient and can affect plant growth. The aim of this study was to compare the growth and accumulation of P in maize, soybean and sunflower plants in vertical gradients of the nutrient in the soil, with and without water stress. The design was completely randomised with five replications, in a 3 x 2 factorial scheme: three soil depth gradients of P (decreasing, increasing and nil) and two conditions of soil water availability (with and with no water stress). The depth gradients of P were in decreasing doses of P2O5 (300, 200, 100 and 0 mg dm-3), increasing doses (0, 100, 200 and 300 mg dm-3) and equal doses (150 mg dm-3) applied to the intermediate layers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil water; Roots; Dry weight; Nutrient accumulation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300419 |
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| Registros recuperados: 10 | |
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