Growth regulator on oat yield indicators

Krysczun, Dionatan K.; Silva, José A. G. da; Marolli, Anderson; Trautmann, Ana P. B.; Lucio, Alessandro D.; Carbonera, Roberto

doi:10.1590/1807-1929/agriambi.v21n12p828-833

Acessibilidade / Reportar erro

Brasil

Revista Brasileira de Engenharia Agrícola e Ambiental

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

ARTICLE • Rev. bras. eng. agríc. ambient. 21 (12) • Dec 2017 • https://doi.org/10.1590/1807-1929/agriambi.v21n12p828-833 copy

Growth regulator on oat yield indicators

Regulador de crescimento sobre os indicadores de produtividade da aveia

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Growth regulator in oat can reduce lodging with effects on yield indicators. The objective of the study is to define the optimum dose of growth regulator to reduce lodging in oats under different conditions of nitrogen (N) fertilization (reduced, high and very high) and the effects on yield indicators in the succession systems. In each succession system (soybean/oats and corn/oats), two experiments were conducted, one to quantify biomass yield and the other to estimate grain yield and lodging. In the four experiments, the design was randomized blocks with four replicates in 3 x 4 factorial scheme, for N-fertilizer doses (30, 90 and 150 kg ha^-1) and growth regulator doses (0, 200, 400 and 600 mL ha^-1), respectively. Growth regulator reduces lodging in oat plants, with the ideal doses of 500 mL ha^-1 in the soybean/oat system and 400 mL ha^-1 in the corn/oat system, regardless of the reduced, high and very high N doses. There is a linear reduction of biological and straw yields, and a quadratic trend in the expression of grain yield and harvest index as a function of the growth regulator doses, regardless of succession systems (soybean/oats and corn/oats).

Key words:
Avena sativa; trinexapac-ethyl; lodging; nitrogen

Source of variation	DF	Mean Square
		BY	GY	SY	HI	LD (%)
		(kg ha^-1)				LD (%)
Block	3	Soybean/oat system
Nitrogen dose (N)	2	36745150*	1275662*	34726431*	0.03042*	301.56*
Growth regulator dose (GR)	3	9703069*	915162*	6782673*	0.00512*	10066.66*
N x GR	3	874573^ns	54497^ns	610077^ns	0.00022^ns	95.31^ns
Error	33	189175	27229	109855	0.00009	45.83
Total	47
Overall mean		10814	3354	7459	0.31	60
CV (%)		4.02	4.91	4.44	3.03	15
Block	3	Corn/oat system
Nitrogen dose (N)	2	10162250*	1164984*	15194564*	0.02577*	114.89*
Growth regulator dose (GR)	3	9937254*	231764*	10838519*	0.00892*	3453.29*
N x GR	6	1517728^ns	67582^ns	1688651^ns	0.00129^ns	123.09^ns
Error	33	510836	50864	290710	0.0001	44.46
Total	47
Overall mean		11035	3248	7787	0.29	20
CV (%)		6.48	6.94	6.92	3.41	27.95

N dose (kg ha^-1)	GR dose (mL ha^-1)	BY	GY	SY	HI	LD (%)
N dose (kg ha^-1)	GR dose (mL ha^-1)	(kg ha-¹)				LD (%)
	Soybean/oat system
30	0	9972 a	3371 a	6629 a	0.37 a	65 a
	200	8969 b	3343 a	5758 b	0.35 b	59 a
	400	8948 b	3289 a	5663 b	0.34 c	30 b
	600	7568 c	2905 b	4598 c	0.33 c	10 c
90	0	12195 a	3937 a	8532 a	0.35 a	76 a
	200	12023 a	3919 a	8104 a	0.32 b	55 b
	400	11126 b	3662 a	7188 b	0.32 b	30 c
	600	9863 c	3200 b	6662 c	0.29 c	5 d
150	0	14313 a	3463 a	11013 a	0.30 a	85 a
	200	12538 b	3392 a	9074 b	0.27 a	62 b
	400	11320 c	3299 a	8236 b	0.24 b	31 c
	600	10964 c	2728 b	7927 b	0.23 b	16 d
	Corn/oat system
30	0	11225 a	3167 a	8085 a	0.30 a	35 a
	200	11213 a	3163 a	8046 a	0.28 b	22 b
	400	10457 b	3140 a	7993 b	0.28 b	13 c
	600	9874 b	2828 b	7045 b	0.28 b	5 c
90	0	11116 a	3645 a	7774 a	0.37 a	39 a
	200	10751 a	3588 a	7188 a	0.36 a	26 a
	400	10048 b	3563 a	6460 b	0.32 c	10 b
	600	9956 b	3342 b	6211 b	0.30 c	5 b
150	0	13955 a	3363 a	11007 a	0.30 a	46 a
	200	12414 a	3280 a	9265 b	0.28 b	26 b
	400	11020 b	3250 a	7652 c	0.25 c	12 c
	600	10397 b	2948 b	7417 c	0.23 c	8 c

N dose (kg ha^-1)		Equation Y = a ± bx ± cx²	R² (%)	P (b_ix)	Ideal dose (mL ha^-1)	y_E
		Soybean/oat system
30		$L D = 59 - 0.10 x$	95	*	490	10
		$B Y = 9949 - 3.61 x$	84	*		8180
		$G Y = 3355 + 0.61 x - 0.0022 x^{2}$	80	*		3125
		$S Y = 6590 - 3.09 x$	98	*		5075
		$H I = 0.33 + 0.00022 X - 0.34 \cdot 10^{- 6} x^{2}$	84	*		0.35
90		$L D = 65 - 0.11 x$	91	*	500	10
		$B Y = 12485 - 3.9 x$	99	*		10535
		$G Y = 3636 + 3.04 x - 0.0062 x^{2}$	96	*		3606
		$S Y = 8600 - 3.26 x$	98	*		6970
		$H I = 0.29 + 0.00026 x - 0.36 \cdot 10^{- 6} x^{2}$	92	*		0.33
150		$L D = 71 - 0.12 x$	98	*	508	10
		$B Y = 13973 - 5.63 x$	92	*		11112
		$G Y = 3281 + 2.21 x - 0.005 x^{2}$	98	*		3113
		$S Y = 10484 - 4.73 x$	91	*		8081
		$H I = 0.22 + 0.00039 x - 0.59 \cdot 10^{- 6} x^{2}$	93	*		0.26
Overall GR dose			-	-	≅ 500	-
	Corn/oat system
30	$L D = 29 - 0.05 x$		99	*	380	10
	$B Y = 11413 - 2.4 x$		80	^ns		10501
	$G Y = 3125 + 0.89 x - 0.0022 x^{2}$		90	^ns		3145
	$S Y = 8198 - 1.93 x$		89	^ns		7465
	$H I = 0.27 + 0.000081 x - 0.11 \cdot 10^{- 6} x^{2}$		53	^ns		0.28
90	$L D = 38 - 0.07 x$		93	*	400	10
	$B Y = 11068 - 2.0 x$		85	*		10268
	$G Y = 3327 + 1.87 x - 0.0023 x^{2}$		71	^ns		3707
	$S Y = 7646 - 2.45 x$		81	*		6666
	$H I = 0.29 + 0.00028 x - 0.30 \cdot 10^{- 6} X^{2}$		93	*		0.35
150	$L D = 36 - 0.06 x$		94	*	433	10
	$B Y = 13757 - 6.0 x$		96	*		11159
	$G Y = 2916 + 2.3 x - 0.0036 x^{2}$		82	^ns		3236
	$S Y = 10692 - 6.19 x$		92	*		8012
	$H I = 0.20 + 0.00038 x - 0.41 \cdot 10^{- 6} X^{2}$		94	*		0.29
Overall GR dose			-	-	≅ 400	-

Departamento de Engenharia Agrícola - UFCG Unidade Acadêmica de Engenharia Agrícola, UFCG, Av. Aprígio Veloso 882, Bodocongó, Bloco CM, 1º andar, CEP 58429-140, Campina Grande, PB, Brasil, Tel. +55 83 2101 1056 - Campina Grande - PB - Brazil
E-mail: revistagriambi@gmail.com

Acompanhe os números deste periódico no seu leitor de RSS

[1] marollia@yahoo.com.br (Corresponding author)