Effect of potassium sources on potato tuber yield and chip quality

Silva, Giovani O; Bortoletto, Antonio C; Carvalho, Agnaldo DF; Pereira, Arione S

doi:10.1590/S0102-053620180318

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Sumário

Scientific Communication • Hortic. Bras. 36 (3) • Jul-Sep 2018 • https://doi.org/10.1590/S0102-053620180318 copy

Effect of potassium sources on potato tuber yield and chip quality

Efeito de fontes de potássio na produtividade de tubérculos e qualidade de chips de batata

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Many potato producers for fry industry changed from the use of potassium chloride to potassium sulfate, as there is a concept that the use of this source improves tuber quality. The aim of this work was to evaluate the effect of these two potassium sources on yield, specific gravity and chip color of potato chipping cultivars. The experiment was carried out on a Dystrophic Red Latosol, in Canoinhas, Brazil, in spring season 2016. Treatments consisted of two potato cultivars, BRSIPR Bel and Atlantic, and two sources of potassium, chloride and sulfate, applied in the furrow at the planting time, in rates based on soil analysis. Experimental design was a randomized complete block in a split-plot arrangement with four replications. Main plots were cultivars and subplots potassium sources. 100 days after planting each sub-plot was evaluated for yield, specific gravity and chip color. There was no significant effect of potassium source on yield components, specific gravity and chip color of BRSIPR Bel and Atlantic.

Keywords:
Solanum tuberosum; mineral nutrition; fertilizer; BRSIPR Bel; Atlantic

Evaluations	NMT¹	NNMT	TNT	MMT	MNMT	TTM	SG	Cor**
Evaluations	(ha^-1/1000)			(t ha^-1)			SG	Cor**
BRSIPR Bel	61.17 a	237.23 a	298.40 a	11.78 b	16.16 a	27.93 a	1.080 b	7.50 a
Atlantic	89.11 a	107.57 b	196.68 a	18.37 a	8.94 b	27.32 a	1.090 a	6.88 a
K₂SO₄	72.62 a	167.35 a	239.96 a	14.95 a	12.22 a	27.17 a	1.084 a	7.25 a
KCl	77.65 a	177.45 a	255.11 a	15.19 a	12.88 a	28.07 a	1.082 a	7.12 a
	p STATISTIC
Cultivars	12.74^ns	1.96*	6.65^ns	4.46*	3.32*	100.00^ns	0.66*	39.10^ns
Fertilizer	100.00^ns	100.00^ns	100.00^ns	100.00^ns	28.18^ns	100.00^ns	12.75^ns	100.00^ns
Fertilizer x cultivar	100.00^ns	100.00^ns	100.00^ns	100.00^ns	100.00^ns	100.00^ns	100.00^ns	100.00^ns
General mean	75.14	172.40	247.54	15.08	12.55	27.63	1.083	7.19
CV cultivar (%)	35.53	32.86	29.10	26.25	30.70	27.96	0.11	17.39
CV fertilizer(%)	19.64	31.55	26.88	18.58	8.84	13.30	0.18	11.88

Associação Brasileira de Horticultura Embrapa Hortaliças, C. Postal 218, 70275-970 Brasília-DF, Tel. (61) 3385 9099, Tel. (81) 3320 6064, www.abhorticultura.com.br - Vitoria da Conquista - BA - Brazil
E-mail: associacaohorticultura@gmail.com

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[TFN1] *Significant at 5% probability by t test. ^nsNot significant, 5% probability by t test. ¹NMT= number of marketable tubers; NNMT= number of non-marketable tubers; TNT= total number of tubers; MMT= mass of marketable tubers; MNMT= mass of non-marketable tubers; TTM= total tuber mass; SG= specific gravity; Cor= chip color. **notes from 1 (dark color) to 9 (light color).