Macronutrient accumulation curves in potato genotypes in the Brazilian Savanna

Pereira, Gabriel Emiliano; Melo, Jackson Willian Pacheco de; Ragassi, Carlos Francisco; Carvalho, Agnaldo Donizete Ferreira de; Silva, Juscimar da; Silva, Giovani Olegário da; Vilela, Michelle Sousa

doi:10.1590/1983-40632020v5064416

Acessibilidade / Reportar erro

Brasil

Pesquisa Agropecuária Tropical

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Research Article • Pesqui. Agropecu. Trop. 50 • 2020 • https://doi.org/10.1590/1983-40632020v5064416 copy

Macronutrient accumulation curves in potato genotypes in the Brazilian Savanna

Curvas de acúmulo de macronutrientes em genótipos de batata no Cerrado brasileiro

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Knowledge on the nutritional demands of different potato genotypes is necessary for the development of fertilizing recommendations. This study aimed to determine and compare the macronutrient accumulation curves in the Agata, Asterix, BRSIPR Bel and F183-08-01 potato genotypes, in order to subsidize the split fertilization that could meet the specific demands of each genotype. A randomized block design was used, with the treatments (genotypes × plant stages) arranged in a split-plot scheme, with three replications. The genotypes were grown in plots containing 75 plants each. The subplots within a plot contained four plants each and corresponded to the number of days after planting, when destructive samples of whole plants were collected. The plants from the subplots were harvested at 24, 38, 52, 66 and 80 days after planting, to estimate the dry mass accumulated by different parts of the plant (shoots + roots, tubers and whole plants), as well as to determine the macronutrient accumulation curves. F183-08-01 presented the highest total accumulation of N, Ca, Mg and S (141.37, 29.21, 25.16 and 22.36 kg ha^-1, respectively). The highest rates of macronutrient accumulation for all the potato genotypes occurred at 24 days after planting, coinciding with the beginning of the tubers formation.

KEYWORDS:
Solanum tuberosum; nutrient uptake; split fertilization

pH	P	K⁺	Ca²⁺	Mg²⁺	Al³⁺	H + Al	CEC	V	OM
H₂O	^__________ mg dm^-3 ^__________		^{__________________________________} cmol_c dm^-3 ^{__________________________________}					%	g dm^-3
5.2	1.0	46.2	4.6	0.7	0.0	6.2	11.7	47	33.7

Genotypes	Leaves (kg ha^-1)	Shoots + roots (kg ha^-1)	Tubers (kg ha^-1)	Whole plant at 80 DAP (kg ha^-1)
Agata	$y = - 4, 702 - 93.43 x + 1, 449 x^{0.5}$ R² = 0.84^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).	$y = - 661.7 + 38.74 x - 0.3161 x^{2}$ R² = 0.99^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).	$y = - 26, 771 - 305.6 x + 6, 356 x^{0.5}$ R² = 0.89^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).	7,268.27 b⁽¹⁾ (1) Means followed by the same letter in the column did not differ (p = 0.05).
Asterix	$y = - 6, 569 - 140.8 x + 2, 073 x^{0.5}$ R² = 0.75^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).		$y = - 9, 320 + 327.7 x - 1.652 x^{2}$ R² = 0.85^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).	8,505.19 ab
BRSIPR Bel	$y = - 1, 299 + 72.78 x - 0.584 x^{2}$ R² = 0.93^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).		$y = - 7, 972 + 274.1 x - 1, 253 x^{2}$ R² = 0.85^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).	7,511.45 b
F183-08-01	$y = - 4, 781 - 85.33 x + 1, 431 x^{0.5}$ R² = 0.90^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).		$y = - 31, 199 + 8, 678 \ln (x)$ R² = 0.94^ Significant (p = 0.01). y = accumulated dry mass (kg ha-1); x = days after planting (DAP).	9,494.00 a

Escola de Agronomia/UFG Caixa Postal 131 - Campus II, 74001-970 Goiânia-GO / Brasil, 55 62 3521-1552 - Goiânia - GO - Brazil
E-mail: revistapat.agro@ufg.br

Acompanhe os números deste periódico no seu leitor de RSS

[TFN1] P-K: Mehlich-1 extractor.