Fertilização potássica na cultura do alho vernalizado

Büll, Leonardo Theodoro; Bôas, Roberto Lyra Villas; Fernandes, Dirceu Maximino; Bertani, Rosemary Marques Almeida

doi:10.1590/s0103-90162001000100024

Cited by 8 publications

(4 citation statements)

References 3 publications

(8 reference statements)

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“…The increase in potassium content may have favored competition for the cationic absorption site, and thus resulted in a reduction in calcium content. This same trend was observed by Büll et al (2001) and by Araújo et al (2015) regarding the cultivation of noble garlic and zucchini, respectively. Another explanation is that this nutrient is poorly mobile in the plant (MALAVOLTA, 2006), being more accumulated in the leaves, which have a large surface of perspiration, whereas the fruits have a small surface.…”

Section: Resultssupporting

confidence: 84%

Castor bean cake in top-dressing application as a source of nitrogen on the production and quality of zucchini organic seeds

et al. 2020

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Studies in vegetables show that fertilization influences seed production positively, however, when the quality of the seeds is analyzed, the results are mostly inconsistent. The objective of this study was to evaluate the effect of castor bean cake (CBC) dose splitting in top-dressing application on the production and quality of zucchini organic seeds, as well as its effect on the macronutrient content of fruits and seeds. The experimental design was a randomized block design and four replications. There were 13 treatments with four doses of CBC in top-dressing (1.7, 3.4, 5.1 and 6.8 t ha-1) per three applications (33.3-33.3-33.3%, 50-50% and 33-50-17%) and the control treatment without any kind of top-dressing fertilization. The study evaluated the number of ripe fruits per plant, the production (number and mass) of seeds per fruit and per plant, the mass of one hundred seeds, seed germination, first germination count, and macronutrient content in the diagnosis leaf, in mature fruits (without seeds) and seeds. The number of ripe fruits per plant was not affected by the CBC doses in top-dressing, neither by the splitting of the applications. It was observed that the number of seeds per fruit, mass of seeds per fruit and mass of seeds per plant showed quadratic behavior. Regarding seed quality, only the 1.7; 3.4 and 5.1 t ha-1 doses produced seed with superior quality than the other doses. In conclusion, the CBC doses increased the number of seeds per fruit, mass of seeds per fruit and per plant up to the 4.5t ha-1 dose, approximately.

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Section: Resultssupporting

confidence: 84%

Castor bean cake in top-dressing application as a source of nitrogen on the production and quality of zucchini organic seeds

et al. 2020

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“…Potassium fertilization is usually carried out under topdressing method as described by Raij et al (1997), and should be divided according to the efficient use of the nutrient by plants and avoiding wounding the leaves due to their salt content. Büll et al (2001) verified that the elevation of potassium levels at the planting-soil provided an increase in the production of bulbs on garlic crop, and this was not influenced by changing potassium levels fertilization on topdressing.…”

Section: Introductionmentioning

confidence: 57%

Potassium Fertilization and Yield Parameters of Carrot

Zanuzo

Bonetti

Josefer

et al. 2017

BJA

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O objetivo deste estudofoi avaliar diferentes doses de potássio em adubações de cobertura e sua influência sobre fatores de crescimento, sanidade, parâmetros de qualidade, desenvolvimento e produtividade na cultura da cenoura. O experimento foi conduzido na área experimental da Universidade Federal de Mato Grosso em delineamento de blocos casualizados com oito tratamentos, sendo 64, 128, 192, 256, 320, 384, 448 e 512 kg ha-1 de K2Ocomtrês repetições. Foram avaliados comprimento e diâmetro de raiz, área foliar e altura de folha, teor de açúcar (oBrix), acidez total titulável, produtividade além da incidência da doençaMancha de Alternária (Alternaria dauci). A dose de 448 kg ha-1de K2O foi a que mais influenciou no crescimento de raiz. A produtividade apresentou aumento linear em relação às doses de K, sendo que 448 kg ha-1 de K2O representou a maior produtividade, tendo alta correlação com o aumento do comprimento de raiz.A acidez e o teor de açúcar não foram influenciados pelas doses de K2O e a incidência de Mancha de Alternaria (Alternaria dauci) diminuiu em função do aumento das doses de K.

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“…This can be explained by the absorption site competition between potassium and magnesium, so that excess potassium, especially through the use of coffee husk, prevents the absorption of magnesium, which is unavailable to the plant by the interionic competitive inhibition effect (Malavolta, 1980). Studies on garlic (Büll et al, 2001) and pumpkin (Sampaio Araújo et al, 2012) also report similar behavior, where excess potassium inhibits magnesium absorption by plants.…”

Section: Resultsmentioning

confidence: 78%

Soil chemical attributes in coffee growing with different agronomic techniques

Voltolini

Silva

Alecrim

et al. 2020

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The objective was to evaluate the chemical attributes in a coffee growing area, according to different agronomic techniques used and their associations. The experiment was conducted in the field, from January 2016 to October 2018. Coffee was planted in January 2016, with Mundo Novo IAC 379-19 coffee seedlings, with a spacing of 3.6 m between rows and 0.75 m between plants in the planting row. The factors under study were arranged in a 3x2x5 factorial scheme, making a total of 30 treatments. In the plots, three soil managements were randomized (soil cover with polyethylene film, soil cover with brachiaria-grass and conventional management of spontaneous vegetation). In the subplots, two types of fertilizers (conventional and increased-efficiency fertilizer). In the sub-subplots, four soil conditioners (coffee husk, phosphogypsum, water retention polymer, organic compost), and the control without conditioner. Aimed to evaluate soil chemical attributes in coffee growing with different agronomic techniques through the evaluation of: soil pH, phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), aluminum saturation (m) and base saturation (V%). The use of fertilizers combined with the application of organic compost or coffee husk, provide increased soil pH, as well as the use of ecological management of brachiaria-grass. The use of organic compost as a soil conditioner increases phosphorus availability in the soil. Coffee husk, as a soil conditioner, is an efficient potassium source for the coffee crop. The use of organic compost and phosphogypsum increases the calcium and magnesium contents in the soil. The use of organic compost and coffee husk was efficient in increasing the base saturation grown with coffee. The use of organic compost, coffee husk and phosphogypsum reduced aluminum saturation in the soil. Treatments associated with the use of organic compost improve calcium, phosphorus and magnesium levels, increase pH and base saturation, besides decreasing aluminum saturation.

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Fertilização potássica na cultura do alho vernalizado

Cited by 8 publications

References 3 publications

Castor bean cake in top-dressing application as a source of nitrogen on the production and quality of zucchini organic seeds

Castor bean cake in top-dressing application as a source of nitrogen on the production and quality of zucchini organic seeds

Potassium Fertilization and Yield Parameters of Carrot

Soil chemical attributes in coffee growing with different agronomic techniques

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