Redução da adubação e doses e parcelamento de nitrogênio no crescimento e produtividade de batata

Kawakami, Jackson

doi:10.1590/s0102-053620150000200006

Cited by 13 publications

(12 citation statements)

References 21 publications

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“…In fact, other authors have also observed higher DW percentage in marketable tubers of cultivar BRS Camila (clone F63-01-06) in relation to Ágata on the three trials held in their study (Silva et al, 2015). Plants submitted to higher doses of NPK have their percentage of DW reduced, mainly due to nitrogen (Kawakami, 2015). Moreover, the increment of potassium dose may result in the accumulation of this element in the tuber, promoting the reduction of the osmotic potential and increment of water absorption, what results in the dilution of DW content of tubers (Pauletti & Menarim, 2004).…”

Section: Marketable Tuber Crop Seasonmentioning

confidence: 76%

“…Moreover, the utilization of doses higher than the optimum dose carries negative consequences to the quality of tubers. There are studies reporting that the increase in nitrogen (Kawakami, 2015) and potassium fertilization (Laboski & Kelling, 2007) result in lower percentage of tuber dry weight, a negative characteristic in the evaluation of tuber quality destined to industry. On the other hand, studies verified that on soils of low phosphorus availability, phosphate fertilization increases starch content (Fernandes et al, 2015) or specific gravity (Laboski & Kelling, 2007) of tubers.…”

Section: Scientific Communicationmentioning

confidence: 99%

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New national potato genotypes: yield response to different doses of 4-14-8 NPK fertilizer

et al. 2018

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The fertilization of potato crops generally does not take into account the genotype, although genotypes may respond differently to fertilization. This study aimed to determine the yield of new potato genotypes (cultivar BRS Camila and clone CL 02-05), as well as the cultivar Ágata, submitted to four NPK 4-14-8 fertilizer doses (0, 2, 4 and 6 t ha-1) in the crop seasons of 2013/14 and 2014/15. We evaluated the total and marketable tuber yield, total and marketable tuber number, percentage of marketable tuber dry weight, average marketable tuber weight and plant growth period. The experimental design was randomized blocks in split plot scheme, with fertilizer doses allocated as main plots and genotypes as subplots, with three replications. We did not observe significant interaction for any analyzed variable. The clone CL 02-05 showed higher total and marketable tuber yield compared to the other cultivars, mainly due to its higher production of tuber number. However, we observed a high amount of tubers not suited for commercialization from the clone CL 02-05. Cultivar BRS Camila produced fewer marketable tubers than cultivar Ágata in crop season 2014/15, but without difference in marketable yield. On the other hand, plants of cultivar BRS Camila had a longer growth period of 7 days and the tubers of this cultivar accumulated higher percentage of dry weight compared to cultivar Ágata. The new tested genotypes had yield response similar to cultivar Ágata when submitted to doses of 4-14-8 NPK fertilizer. Therefore, the fertilization management of these new genotypes may be similar to that used with cultivar Ágata.

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Section: Marketable Tuber Crop Seasonmentioning

confidence: 76%

Section: Scientific Communicationmentioning

confidence: 99%

New national potato genotypes: yield response to different doses of 4-14-8 NPK fertilizer

et al. 2018

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“…Fertilizer recommendations for the potato crop in Brazil indicate massive applications of N and K in the planting furrows, along with all P fertilizer, and N sidedressing before hilling [17][18]. Brazilian potato farmers traditionally have used high fertilizer rates at planting (e.g., 3-4 Mg ha -1 4-14-8 N-P2O5-K2O, regardless of soil fertility), to prevent lack of nutrients for the plants and consequent financial profitability drop [19]. This traditional fertilization practice is not in accordance to the initial nutritional demands of the 'Atlantic' potato cultivar, which takes up only 16% N and 20% K before tuber initiation [2].…”

Section: N×k Interactionsmentioning

confidence: 99%

Agronomic and Economic Interactions between Sidedressed Nitrogen and Potassium Fertilizations on ‘Atlantic’ Potato

Yagi

Nazareno²,

Soratto

2020

Braz. arch. biol. technol.

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Nitrogen (N) and potassium (K) in potato crop planting synergistically increase tuber yield, but there are no studies on this interaction in sidedressing. In two experiments with 'Atlantic' potato combinations of four N rates (0, 50, 100, and 150 kg ha-1) with four K2O rates (0, 100, 200, and 300 kg ha-1) were applied in sidedressing in a 4×4 factorial scheme with three replications in a completely randomized design. Adjacent commercial fields were sampled to economic comparisons with experimental results. Significant interaction between N and K sidedressing rates with tuber yields increase also was confirmed and classified as Liebigsynergism. Compared to the isolated N and K applications in sidedressing, joint N and K fertilizations, respectively, increases by 11% and 48% marketable tuber yields in the summer-fall experiment, and 12% and 7% in the spring experiment. Joint N and K applications as sidedressing was more profitable than planting fertilization, mainly at higher N and K rates. The response of specific gravity of 'Atlantic' potato tubers to the N and K sidedressing rates was mediated by interactions between edaphoclimatic conditions and inputs of N and K. The combined application of N and K sidedressing rates increased specific gravity in the summerfall experiment, but had a negative effect in the spring experiment. Therefore, our results provide strong evidence that the fertilization management for potato crop in Brazil can be modified by applying higher amounts of N and K in sidedressing to match nutritional needs of the crop.

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“…In order to meet the nutritional needs of the crop and to achieve high yields, it is necessary to apply high amounts of inputs, especially in tropical soils with a low fertility characteristic [13], which leads to an increase in production costs, promoting a impact on the environment [14]. In view of this, potato farmers opt for high fertilization investments to avoid possible nutrient deficiencies during the crop cycle [15], since plants are not necessarily able to use these nutrients effectively by the root system. Thus, more and more, there is a need to search for genotypes that are more adapted to the Brazilian climate conditions, in order to optimize the available inputs.…”

Section: Introductionmentioning

confidence: 99%

Agronomic Performance of New Potato Genotypes Submitted to Increasing Doses of NPK

Santos

Gabardo

Kawakami

et al. 2019

JEAI

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Aims: Estimate the morphological characteristics of potato genotypes grown with different doses of NPK fertilizer 4-14-8. Study Design: The experiment was conducted in randomized blocks with subdivided plots and three replicates. Place and Duration of Study: The experiment was carried out in the municipality of Guarapuava – PR, Brazil, during the growing seasons of 2013/2014 and 2014/2015. Methodology: In the main plots the doses of 0, 2, 4 and 6 t ha-1 of NPK fertilizer 4-14-8 were arranged and in the subplots the genotypes (Ágata, BRS Camilla and clone C0205). Were evaluated: The leaf area index (LAI), percentage of light absorption, number of tubers, fresh mass of tubers. In the first agricultural year the evaluations were performed at 25 and 45 days after the emergency (DAE) and in the second seasson at 28 and 48 DAE. Interaction between potato genotypes and fertilizer rates for LAI was observed at 45 DAE in 2013/14 and absorbance at 25 DAE in 2013/14. For the seasson 2013/14, the genotypes showed a significant difference for LAI, absorbance, number of tubers and fresh mass of tubers at 25, LAI and fresh mass of tubers at 45 DAE, clone C0205 presented the largest differences for these characteristics. Fertilizer doses did not influence LAI, absorbance at 25 DAE and 45 DAE in 2013/14 and, at 2014/15 at 28 DAE, there was no response for tuber number and LAI, and at 48 DAE for tuber number, absorbance. There was no significant interaction between fertilizer doses and potato plant genotypes for the data on number of primary stems and number of secondary stems in both seassons The genotypes responded to NPK fertilizer doses 4-14-8 for LAI, and clone C0205 presented the best results. The genotypes responded to the light absorption percentage, with C0205 presenting the best results, so that plants with greater leaf area presented greater light absorption. The genotype C0205 presents greater productive capacity when compared to the Agata and Camila genotypes, being evident the greater number and fresh mass of tubers produced.

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Redução da adubação e doses e parcelamento de nitrogênio no crescimento e produtividade de batata

Cited by 13 publications

References 21 publications

New national potato genotypes: yield response to different doses of 4-14-8 NPK fertilizer

New national potato genotypes: yield response to different doses of 4-14-8 NPK fertilizer

Agronomic and Economic Interactions between Sidedressed Nitrogen and Potassium Fertilizations on ‘Atlantic’ Potato

Agronomic Performance of New Potato Genotypes Submitted to Increasing Doses of NPK

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