Resposta à adubação com uréia, cloreto de potássio e ácido bórico em mudas abacaxizeiro'Smooth Cayenne'

Coelho, Ruimário Inácio; Carvalho, Almy Júnior Cordeiro de; Marinho, Cláudia Sales; Lopes, José Carlos; Pessanha, Patrícia Gomes de Oliveira

doi:10.1590/s0100-29452007000100033

Cited by 8 publications

(6 citation statements)

References 4 publications

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“…The number of leaves of treatments with potassium rates were fitted to a linear equation, the treatment with the highest rate (200 mg dm -3 ) showing an increase of 21 (55 DAE) and 26% (74 DAE) compared with the treatment without potassium fertilization ( Figure 3B). Potassium fertilization increases the number of leaves due to its contribution to several biochemical processes, such as carbohydrate metabolism, photosynthesis, respiration and enzymatic activation (COELHO et al, 2007).…”

Section: Resultsmentioning

confidence: 99%

Nitrogen and Potassium in Safflower: Chlorophyll Index, Biometric Characteristics and Water Use Efficiency

et al. 2018

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Safflower crops is usually intended for production of seeds to oil extraction. The objective of this work was to evaluate the chlorophyll index, biometric characteristics and water use efficiency of safflower plants grown under different nitrogen and potassium rates and controlled soil water tension. The experiment was conducted in a greenhouse, in pots containing 8 dm3 of a Oxisol. A complete randomized block experimental design in a 5x5 factorial arrangement was used, with four replications, consisting of five nitrogen rates (0, 60, 120, 180 and 240 mg dm-3) and five potassium rates (0, 50, 100, 150 and 200 mg dm-3). The safflower number of leaves, stem diameter, chlorophyll index, number of capitula, shoot, root and total dry weights, water consumption and water use efficiency were evaluated. Data were subjected to analysis of variance (F test) at 5% of probability and to polynomial regression. The nitrogen and potassium fertilization, as independent factors, affected the safflower plants. The chlorophyll index, biometric characteristics and water use efficiency of safflower showed better responses under nitrogen rates of 82 to 168 mg dm-3. The responses of chlorophyll index, biometric characteristics and water use efficiency of safflower increased 10 to 60% with potassium fertilization.

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Section: Resultsmentioning

confidence: 99%

Nitrogen and Potassium in Safflower: Chlorophyll Index, Biometric Characteristics and Water Use Efficiency

et al. 2018

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“…The dry mass of shoots as a function of N doses showed a quadratic response, reaching higher value in crowns treated with 12.88 g urea pot -1 (Table 3). Nitrogen fertilization tends to accelerate growth, reducing the nursery period for pineapple plantlet, as verified by Silva et al (2016) in micropropagated plantlet in the acclimatization phase and by Coelho et al (2007b) in stem section plantlet.…”

Section: Resultsmentioning

confidence: 84%

“…Nitrogen fertilization is one of the factors responsible for the quality of plantlet and vegetative growth, since nitrogen is the nutrient that has an effect on the development of pineapple plants, both in the seedling production and growth, fruit development and productivity (COELHO et al, 2007b;BREGONCI et al, 2008;RIBEIRO et al, 2011;FREITAS et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Production of shoots from ‘Smooth Cayenne’ pineapple crowns with nitrogen fertilization

et al. 2020

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Abstract Pineapple fruit crowns are rarely used as planting material in Brazil. However, they can be used to produce plantlet in situations of scarcity of planting material of adequate quality. The aim of this work was to evaluate the production and nutritional status of early shoots of different sizes produced from ‘Smooth Cayenne’ pineapple crowns with nitrogen fertilization after the removal of its apical meristem. The experimental design adopted was that of randomized blocks in a 4x4 factorial scheme, with four nitrogen doses (5, 10, 15 and 20 g of urea per pot), four minimum shoot lengths at harvesting (10, 15, 20 and 25 cm), with four replicates. Under full sun cultivation conditions, crowns produced 18.11 and 6.83 shoots with 10 and 25 cm in length, respectively, up to 380 days after planting and removal of the apical meristem. Pineapple shoots harvested at 180 days presented better biometric quality and can be harvested up to 380 days after crown planting. Increasing urea doses reduce P, K and Ca levels in the dry mass of shoots.

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“…The direct effect of potassium on leaf growth is not completely understood, but is related to nitrogen. Potassium fertilization increases the LAI due to its contribution to several chemical processes, e.g., K increases the uptake of N by plant roots because K is an accompanying ion for nitrogen nitrates during transport in the xylem (COELHO et al, 2007). According to Cruz et al (2007), N application significantly increases leaf area.…”

Section: Leaf Area Index and Net Assimilation Ratementioning

confidence: 99%

GROWTH CHARACTERISTICS OF SHALLOT var. TINOMBO FOLLOWING APPLICATION OF POTASSIUM FERTILIZER AND MANURE

Muhardi

2022

Rev. Caatinga

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The response of shallot plants to potassium differs substantially depending on the cultivar, organic matter, soil conditions, and weather in the cultivation area. This research aimed to determine some of the growth characteristics of a Tinombo variety of shallot following treatment with an organic fertilizer comprising manure and potassium in the area of Palu, Central Sulawesi. This research took the form of a greenhouse experiment with planting in pots arranged in a completely randomized factorial pattern. The first factor was the application of chicken manure at 0 and 10 tons.ha-1, while the second factor was the dose of KCl fertilizer: 0 kg.ha-1; 30 kg.ha-1; 60 kg.ha-1 and 90 kg K2O.ha-1. Each treatment was replicated three times. The application of potassium and manure significantly affected the accumulation of dry matter and the linear growth rate of shallot var. Tinombo. Manure applied at 10 tons.ha-1 increased the leaf area index when combined with 0 to 60 kg K2O.ha-1. However, the addition of manure increased the net assimilation rate at all doses of potassium fertilizer. The number of bulbs and harvest index were affected by the amount of manure and potassium fertilizer applied, but there was no significant interaction between these two factors. Applying manure and K2O fertilizer resulted in a significantly higher number of bulbs and a better harvest index than in those cases where the two types of fertilizer were not applied.

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Resposta à adubação com uréia, cloreto de potássio e ácido bórico em mudas abacaxizeiro'Smooth Cayenne'

Cited by 8 publications

References 4 publications

Nitrogen and Potassium in Safflower: Chlorophyll Index, Biometric Characteristics and Water Use Efficiency

Nitrogen and Potassium in Safflower: Chlorophyll Index, Biometric Characteristics and Water Use Efficiency

Production of shoots from ‘Smooth Cayenne’ pineapple crowns with nitrogen fertilization

GROWTH CHARACTERISTICS OF SHALLOT var. TINOMBO FOLLOWING APPLICATION OF POTASSIUM FERTILIZER AND MANURE

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