RESPONSE OF BEET TO PHOSPHORUS RATES IN OXISOL WITH HIGH CONTENT OF THE NUTRIENT

PASSOS, DANILO DOS REIS CARDOSO; CECÍLIO FILHO, ARTHUR BERNARDES; CARLOS, TANCREDO JOSÉ; BARBOSA, ANNE JUCIELY VIEIRA

doi:10.1590/1983-21252022v35n312rc

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Agronomy • Rev. Caatinga 35 (3) • Jul-Sep 2022 • https://doi.org/10.1590/1983-21252022v35n312rc copy

RESPONSE OF BEET TO PHOSPHORUS RATES IN OXISOL WITH HIGH CONTENT OF THE NUTRIENT

RESPOSTA DA BETERRABA A DOSES DE FÓSFORO EM LATOSSOLO COM ALTO TEOR DO NUTRIENTE

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

An experiment was carried out aiming to evaluate the effect of phosphorus rates on beet, in an Oxisol with high phosphorus (P) content, in Jaboticabal city, São Paulo, Brazil. The treatments were arranged in a factorial scheme, in a randomized block experimental design with four replicates. The factors evaluated were P rates (0, 120, 240, 360 and 480 kg ha^-1 P₂O₅) and cultivar ('Early Wonder' and 'Kestrel'). At 50 days after transplanting the seedlings, foliar nitrogen (N), P, potassium (K) and boron (B) contents were evaluated, and there was no effect of the interaction between factors on foliar nutrient contents. The accumulation of these four nutrients was evaluated at harvest. All evaluated nutrients accumulated to higher levels in ‘Early Wonder’ than in 'Kestrel' both in the shoots and tuberous root. N, P and B accumulated more in the tuberous root whilst K accumulated more in the shoots. P dose did not influence the yield. Therefore, phosphate fertilization is not recommended for beet crop when cultivated in an Oxisol with a high content (88 mg dm^-3) of available P.

Keywords:
Beta vulgaris; Phosphate fertilization; Phosphorus excess; Mineral nutrition; Cultivar

Month	maxT (⁰C)	minT (⁰C)	averT (⁰C)	HR (%)	Rainfal (mm)	RDN
June	27.3	11.4	18.9	63.9	0	0
July	28.8	8.1	18.0	58.7	0	0
Augost	34.8	9.8	21.0	58.3	17.1	4
September	34.9	12.6	24.4	36.5	0	0
Average	31.5	10.5	20.6	54.4	-	-

Sources of variation	F values
Sources of variation	N	P	K	B	Yield
Cultivar (C)	13.7**¹	36.9**	0.1^ns	4.8*	1.90^ns
P dose (P)	1.6^ns	0.7^ns	1.3^ns	2.3^ns	0.23^ns
C x P	0.9^ns	0.3^ns	2.3^ns	1.7^ns	0.23^ns
CV (%)	9.9	9.8	16.8	29.9	16.52

Cultivar	Means
Cultivar	g kg^-1			mg kg^-1	kg ha^-1
‘Early Wonder’	25.2 a	7.7 a	60. 6 a	44.8 a	33011 a
‘Kestrel’	22.5 b	6.4 b	61. 6 a	36.4 b	30717 a
MSD	1.5	0.5	6.6	7.9	3416

P-P₂O₅ dose (kg ha^-1)	Means
P-P₂O₅ dose (kg ha^-1)	g kg^-1			mg kg^-1	kg ha^-1
0	23.9	6.7	57.1	40.3	30298.6
120	22.1	6.9	67.0	36.8	32034.6
240	24.1	7.2	60.7	38.2	32123.7
360	24.3	7.1	57.7	51.8	32488.0
480	24.9	7.2	63.1	35.9	32378.2
MSD	3.4	1.0	15.0	17.7	7689.1

Sources of variaton	F values
Sources of variaton	N-S	P-S	K-S	B-S	N-TR	P-TR	K-TR	B-TR
Cultivar (C)	16.9**¹	64.2**	44.7**	27.2**	5.7*	20.7**	5.1*	5.5*
P dose (P)	0.45^ns	0.7^ns	1.6^ns	0.8^ns	0.2^ns	1.4^ns	0.6^ns	3.2*
C x P	1.5^ns	1.3^ns	1.0^ns	0.7^ns	2.1^ns	0.5^ns	2.4^ns	1.^ns
CV (%)	35.1	18.7	23.8	33.4	16.3	18.8	27.3	15.4

Cultivar	Means (mg plant^-1)
‘Early Wonder’	150.3 a	40.9 a	590.1 a	0.17 a	223.3 a	45.0 a	230.7 a	1.06 a
‘Kestrel’	94.5 b	25.2 b	353.4 b	0.10 b	197.5 b	34.3 b	189.9 b	0.94 b
MSD	27.9	4.0	73.0	0.03	22.3	4.9	37.2	0.10

P-P₂O₅ dose (kg ha^-1)	Means (mg plant^-1)
0	108.8	30.3	394.2	0.15	210.6	35.1	184.0	0.89
120	116.3	32.4	509.9	0.15	210.8	39.0	216.3	0.93
240	119.3	34.7	503.3	0.14	212.5	42.4	210.7	1.05
360	130.4	34.1	506.7	0.13	217.3	42.7	218.8	1.03
480	136.6	33.8	446.8	0.12	200.8	39.2	221.5	1.13
MSD	62.7	9.1	164.2	0.07	50.2	10.9	83.7	0.23

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