Influência de composto orgânico e fósforo sobre sementes de alface

Quadros, Bárbara Rodrigues de; Corrêa, Carla Verônica; Magro, Felipe Oliveira; Cardoso, Antônio Ismael Inácio

doi:10.5433/1679-0359.2012v33supl1p2511

Cited by 8 publications

(15 citation statements)

References 3 publications

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“…In broccoli, which is of the same species as cauliflower, Magro et al (2009) reported, for seed production, higher extraction of all the macronutrients in relation to commercial cultivation. Kano et al (2006Kano et al ( , 2012, Magro et al (2010) and Quadros et al (2012) reported that the amounts of nutrients required for seed production is higher than for obtaining commercial product in species which show longer cycle. Carvalho & Nakagawa (2012) highlight that nutritional requirement for most species becomes more intense at the beginning of the reproductive stage, being more critical during the seed formation, when considerable amounts RESUMO Adubação fosfatada no acúmulo de macronutrientes em plantas de couve-flor destinadas à produção de sementes Devido à escassez de informações relacionadas à quantidade de nutrientes extraídos pelas plantas na produção de sementes de hortaliças e o efeito da adubação nesta extração, nota-se a necessidade de se estudar o acúmulo de nutrientes nos diferentes órgãos das plantas quando se varia a adubação no plantio.…”

Section: Pesquisa / Researchunclassified

Phosphate fertilization over the accumulation of macronutrients in cauliflower seed production

et al. 2016

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Considering the scarce information on nutrient extraction by plants for seed production within vegetable crops, as well as the effect of fertilization over extraction, studying nutrient accumulation in different plant parts under varied fertilization rates is necessary. This study aimed to evaluate the influence of phosphate rates on macronutrient accumulation in cauliflower plants during seed production. Five phosphate rates were studied (0, 300, 600, 900 and 1200 kg/ha P 2 O 5 ), in a randomized complete block design, with four replications. Accumulation of nutrients in the different plant parts was evaluated at the end of the cycle (vegetative and reproductive, the latter divided in seeds and inflorescence). Data were submitted to analysis of variance and regression. Considering only the seeds, a quadratic effect was obtained for the accumulation of all macronutrients, with maximum estimated for rates between 858 and 952 kg/ha P 2 O 5 . Considering the whole plant (total accumulation), a linear increase for P, Ca and S was obtained the higher the P 2 O 5 rates, while the effect was quadratic for N, K and Mg accumulation. The total nutrient accumulation descending order was: K>N>Ca>S>P>Mg, and considering only the seeds was: N>S>K>P>Ca>Mg, S being highlighted as the second most accumulated nutrient in the seeds.

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Section: Pesquisa / Researchunclassified

Phosphate fertilization over the accumulation of macronutrients in cauliflower seed production

et al. 2016

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“…In broccoli, Magro et al (2010) concluded that there was a linear increase in seed production as the doses of organic compost increased up to 120 t ha -1 , without affecting their quality. Also, Quadros et al (2012) observed that there was an increase in the number of lettuce seeds with organic compost fertilization with and without phosphorus addition before planting. Splittings and doses of castor bean cake: seed quality No significant interaction was observed between doses and splittings for mass of one thousand seeds (MTS), first germination count test (FC), germination, root length and seedling shoot mass.…”

Section: Resultsmentioning

confidence: 92%

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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“…The typical response of plants to low fertility soil is the reduction in the amount of seeds produced, causing reduction in seed quality. The reducing of production without affecting the quality of seeds has been observed by many authors who also studied doses of organic and mineral fertilizers in the production of vegetable seeds (Kano et al, 2006;Magro et al, 2010;Quadros et al, 2012). In the current study, we observed effect on seed production, but there was no statistical significant difference for most quality traits.…”

Section: Seed Qualitymentioning

confidence: 86%

Sulphur (S) topdressing and organic compost in production, quality and nutrients accumulation of broccoli seeds at planting time

Corrêa¹,

Gouvêia²,

Lanna³

et al. 2017

Aust J Crop Sci

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Most recent studies have focused to the nutrition and fertilizer recommendations of commercial broccoli production. There are a few studies on effect of fertilization on seed production. Although Brazil is a major producer of vegetables, research on seed production of broccoli is scarce. Therefore, it is necessary to develop research lines that increase the information regarding the nutritional requirements for seed production, since in broccoli; there is a 60 days cycle for production, which leads to the understanding of a greater nutritional need of the crop. It is known that sulphur is the second most accumulated nutrient in broccoli seeds. This study aimed to evaluate the effect of doses of sulphur topdressing; and organic compost fertilization on the production and quality of broccoli seeds at planting. The experimental design was a randomized complete block, with ten treatments (5x2 factorial design) and four repetitions. Treatments consisted of five doses of S topdressing (0, 58, 115, 173 and 230 kg S.ha-1) in the presence or absence of organic compost (100 t ha-1) at planting stage. Seed production (mass and number per plant), mass of thousands of seeds, seed quality (germination, first germination count, germination speed index, seedling length, and seedlings fresh weight); and macronutrients accumulation in the seeds were evaluated. The amount of seeds per plant was 9836 and 8005 seeds per plant in the presence or absence of organic compost, respectively. The seeds fresh mass of 45.7 and 33.1 g of seeds per plant was produced with and without organic compost, respectively. However, the other characteristics, such as total germination (G), first count (FC), germination index rate (GIR), and seedling fresh mass (SFM) did not reach any significant differences. Regarding to the doses of sulphur, a linear increase was detected to the equation for all macronutrients extracted in the absence of organic compost at planting. However, in the presence of organic compost (100 t ha-1) at planting, a linear equation was obtained for P, Mg and S. For the other macronutrients, a quadratic function occurred, with average values of 2329.2, 431.4 and 326, 5 mg plant-1 at the maximum doses estimated in 165.56, 146.50 and 171.42 for N, K and Ca, respectively.

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Influência de composto orgânico e fósforo sobre sementes de alface

Cited by 8 publications

References 3 publications

Phosphate fertilization over the accumulation of macronutrients in cauliflower seed production

Phosphate fertilization over the accumulation of macronutrients in cauliflower seed production

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

Sulphur (S) topdressing and organic compost in production, quality and nutrients accumulation of broccoli seeds at planting time

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