Agronomic traits of white oat treated with the growth regulator trinexapac-ethyl

Fernandes, Carlos Henrique dos Santos; Arruda, Klever Márcio Antunes; Tejo, Débora Perdigão; Zucareli, Claudemir

doi:10.1590/0034-737X202370020011

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Physiology and morphology applied to agriculture • Rev. Ceres 70 (2) • Mar-Apr 2023 • https://doi.org/10.1590/0034-737X202370020011 copy

Agronomic traits of white oat treated with the growth regulator trinexapac-ethyl

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The growth and yield performance of white oat cultivars may vary in response to doses of trinexapac-ethyl (TE) growth regulator. The objective of the work was to evaluate the lodging and productive performance of white oat cultivars under different doses of trinexapac-ethyl growth regulator. The experiments were carried out in a randomized complete block design with four replications, in a 4 x 2 factorial scheme, with four doses of trinexapac-ethyl (0, 50, 100 and 150 g ha^-1) applied in the phenological stage between the 1^st visible stalk node and the 2^nd perceptible node in two white oat cultivars (URS Altiva and URS Corona). The following were evaluated: plant height, panicle length, panicles per m², spikelets per panicle, grains per spikelet, number of grains per panicle, thousand grain weight, plant lodging and grain yield. The application of trinexapac-ethyl at doses 100 and 150 g ha^-1 reduces plant height and panicle components: length, number of spikelets and grains per panicle of the two cultivars. TE doses above 100 g ha^-1 provide a significant reduction in lodging with an increase in the number of panicles per m² and in grain yield for the two white oat cultivars.

Keywords
Avena sativa L.; growth regulator; productivity; yield components

				Mean squares			CV
Year	Variables	Block	Genotype (G)	Dose (D)	D x G	Residue	(%)	Mean
	PL	0.048	20,801^ /*** significant at 5 and 1% probability by the F test, respectively;	9,578^ /*** significant at 5 and 1% probability by the F test, respectively;	0.677^ns ns not significant;	0.334	3.39	17.01
	SPP	1,447	140,281^ /*** significant at 5 and 1% probability by the F test, respectively;	71,864^ /*** significant at 5 and 1% probability by the F test, respectively;	1,197^ns ns not significant;	1,376	3.66	32.09
	GPSt	0.002	1.28^ /*** significant at 5 and 1% probability by the F test, respectively;	0.008^ns ns not significant;	0.003^ns ns not significant;	0.006	3.63	2.18
	GPP	2,041	3612.5^ /*** significant at 5 and 1% probability by the F test, respectively;	142,208^ /*** significant at 5 and 1% probability by the F test, respectively;	22,083^ /*** significant at 5 and 1% probability by the F test, respectively;	2,875	2.37	71.56
2019	Plant height	4,114	1391.281^ /*** significant at 5 and 1% probability by the F test, respectively;	2978.031^ /*** significant at 5 and 1% probability by the F test, respectively;	376447^ /*** significant at 5 and 1% probability by the F test, respectively;	8,138	2.49	114.17
	P/M²	20,281	258781^ /*** significant at 5 and 1% probability by the F test, respectively;	7270.031^ /*** significant at 5 and 1% probability by the F test, respectively;	122,114^ns ns not significant;	41,305	2.08	308.78
	GY	6025.6	192665.2^* */** significant at 5 and 1% probability by the F test, respectively;	551221.3^ /*** significant at 5 and 1% probability by the F test, respectively;	85888.8^ns ns not significant;	34242.2	5.03	3677.59
	TGW	1.74	42.32^ /*** significant at 5 and 1% probability by the F test, respectively;	1337^ns ns not significant;	40,722^ /*** significant at 5 and 1% probability by the F test, respectively;	1182	3.33	32.68
	lodging	9,335	27132.8^ /*** significant at 5 and 1% probability by the F test, respectively;	868.9^ /*** significant at 5 and 1% probability by the F test, respectively;	871.7^ /*** significant at 5 and 1% probability by the F test, respectively;	3324	6.22	29.32
	PL	3.02	67.28^ /*** significant at 5 and 1% probability by the F test, respectively;	40196^ /*** significant at 5 and 1% probability by the F test, respectively;	0813^ns ns not significant;	1,305	6.87	16.63
	SPP	2.25	518.42^ /*** significant at 5 and 1% probability by the F test, respectively;	124.24^ /*** significant at 5 and 1% probability by the F test, respectively;	39.74^ /*** significant at 5 and 1% probability by the F test, respectively;	6931	12.93	20.35
	GPSt	3	0.02^ /*** significant at 5 and 1% probability by the F test, respectively;	0.01^ns ns not significant;	0,002^ns ns not significant;	4	3.21	2.04
	GPP	29708	2016.1^ /*** significant at 5 and 1% probability by the F test, respectively;	360.4^ /*** significant at 5 and 1% probability by the F test, respectively;	227.1^ /*** significant at 5 and 1% probability by the F test, respectively;	31565	13.28	42.31
2020	Plant height	12.86	536.28^ /*** significant at 5 and 1% probability by the F test, respectively;	884.53^ /*** significant at 5 and 1% probability by the F test, respectively;	69.78^ /*** significant at 5 and 1% probability by the F test, respectively;	11436	3.47	97.53
	P/M²	413.86	330281.2^ /*** significant at 5 and 1% probability by the F test, respectively;	25677.6^ /*** significant at 5 and 1% probability by the F test, respectively;	5614.2^ /*** significant at 5 and 1% probability by the F test, respectively;	945959	6.54	470.47
	GY	111997.6	24808.7^ns ns not significant;	45480.0^ns ns not significant;	15753.1^ns ns not significant;	83138.75	6.5	4463.97
	TGM	1765	2881^ns ns not significant;	2124^ns ns not significant;	6776^ns ns not significant;	5271	7.07	32.47
	lodging	66145	3202.01^ /*** significant at 5 and 1% probability by the F test, respectively;	833.28^* */** significant at 5 and 1% probability by the F test, respectively;	544.61^ns ns not significant;	185.51	96.66	14.09

		2019 Harvest				2020 Harvest
Variable^/1 /1 Variable: PL: panicle length (cm); SPP: number of spikelets per panicle; GPSt: number of grains per spikelet; GPP: number of grains per panicle; Plant height (cm); P/M2: number of panicles per m2; GY: grain yield (kg ha-1); TGW: thousand grain weight (grams); Lodging (%).	Cultivar	Trinexapac-ethyl (g ha^-1)				Trinexapac-ethyl (g ha^-1)
		0	50	100	150	0	50	100	150
PL	URS Corona	18.7 a	18.4 a	18.4 a	15.8 a	19.9 a	20.3 a	16.7 a	15.2 a
(cm)	URS Altiva	17.1 b	16.6 b	16.1 b	15.0 a	16.9 b	16.8 b	13.6 b	13.2 b
SPP	URS Corona	35.0 a	35.5 a	35.2 a	30.2 a	29.7 a	29.5 a	20.5 a	17.7 a
SPP	URS Altiva	32.0 b	32.0 b	31.0 b	25.0 b	18.1 b	17.5 b	15.3 b	14.4 a
GPSt	URS Corona	2.37 a	2.40 a	2.45 a	2.32 a	2.01 a	2.07 a	2.01 a	2.07 a
GPSt	URS Altiva	1.97 b	2.00 b	2.00 b	1.97 b	1.97 a	2.05 a	2.02 a	2.01 a
GPP	URS Corona	85.5 a	85.0 a	84.7 a	73.5 a	59.5 a	61.2 a	43.5 a	36.7 a
GPP	URS Altiva	61.2 b	63.0 b	62.5 b	57.0 b	35.5 b	35.7 b	33.0 b	33.2 a
Plant height	URS Corona	132.5 a	132.0 a	129.7 a	90.0 a	105.2 a	102.7 a	89.7 b	76.0 b
Plant height	URS Altiva	127.2 b	122.5 b	96.2 b	85.5 b	108.5 a	106.7 a	99.2 a	92.0 a
P/M²	URS Corona	294.2 a	297.2 a	303.7 a	351.2 a	345.2 b	341.5 b	378.0 b	410.7 b
P/M²	URS Altiva	289.5 a	285.2 b	292.7 b	356.2 a	495.2 a	507.2 a	633.0 a	652.7 a
GY (kg ha^-1)	URS Corona	3336 b	3327 b	3641 a	4094 a	4479 a	4386 a	4500 a	4378 a
GY (kg ha^-1)	URS Altiva	3675 a	3644 a	3690 a	4010 a	4572 a	4335 a	4526 a	4533 a
TGW (g)	URS Corona	29.9 b	30.17 b	30.5 b	35.5 a	32.3 a	33.1 a	33.1 a	30.2 a
TGW (g)	URS Altiva	35.1 a	34.75 a	34.4 a	31.1 b	32.5 a	32.1 a	33.1 a	33.4 a
Lodging (%)	URS Corona	74.2 a	76.0 a	51.5 a	32.0 a	23.7 a	45.0 a	26.7 a	0.81 a
Lodging (%)	URS Altiva	0.17 b	0.20 b	0.20 b	0.22 b	9.27 a	5.32 b	1.57 b	0.17 a

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[1] *Corresponding author: carloshenrique_fernandes_@hotmail.com