Cardinal temperatures and modeling of vegetative development in guava

Ferreira, Mábele de C.; Martins, Fabrina B.; Florêncio, Gabriel W. L.; Pasin, Liliana A. A. P.

doi:10.1590/1807-1929/agriambi.v23n11p819-825

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Articles • Rev. bras. eng. agríc. ambient. 23 (11) • Nov 2019 • https://doi.org/10.1590/1807-1929/agriambi.v23n11p819-825 copy

Cardinal temperatures and modeling of vegetative development in guava

Temperaturas cardinais e modelagem do desenvolvimento vegetativo em goiabeira

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The aim of this study was to estimate cardinal temperatures (base, optimum, and maximum), and simulate the vegetative development of guava crop through phyllochron (linear) and Wang and Engel (nonlinear) models at the seedling phase. The experiment was conducted in Itajubá, MG, Brazil (22° 24’ 46.43” S 45° 26’ 48.94” W), for two years in a completely randomized design with twelve sowing dates and five experimental units per treatment, totaling sixty experimental units. The cardinal temperatures were estimated using twelve methods described in the literature and the values were: base, 10.9 °C, optimum, 17.3 °C and maximum, 51.2 °C. The phyllochron model was superior to Wang and Engel’s model for simulation of vegetative growth of guava, with root mean square error of 1.5 leaves.

Key words:
Psidium guajava L.; leaf appearance; degree days

Sowing date (month/day/year)	Seedling emergence * (month/day/year)	End of the seedling phase ** (month/day/year)	Seedling phase duration (days)	Air temperature (ºC)
Sowing date (month/day/year)	Seedling emergence * (month/day/year)	End of the seedling phase ** (month/day/year)	Seedling phase duration (days)	Minimum***	Medium***	Maximum***
E1, 05/12/2015	06/15/2015	12/23/2015	192	15.0	20.4	27.6
E2, 06/12/2015	07/17/2015	12/30/2015	167	15.8	21.2	28.3
E3, 07/10/2015	08/05/2015	01/27/2016	176	16.7	21.9	28.8
E4, 08/11/2015	09/04/2015	01/16/2016	135	17.7	22.6	29.1
E5, 09/10/2015	09/30/2015	03/09/2016	162	18.3	23.0	29.4
E6, 10/09/2015	10/28/2015	03/16/2016	141	18.2	23.0	29.3
E7, 11/13/2015	12/04/2015	04/07/2016	126	18.0	22.6	29.0
E8, 12/11/2015	12/30/2015	05/12/2016	135	16.9	22.0	28.7
E9, 01/12/2016	02/02/2016	06/23/2016	143	14.7	20.1	27.2
E10, 02/11/2016	02/29/2016	07/21/2016	144	12.8	18.6	26.2
E11, 03/11/2016	03/30/2016	08/25/2016	149	11.3	17.6	25.9
E12, 04/12/2016	04/28/2016	09/22/2016	154	10.6	17.3	25.7

Sowing date	Phyllochron (°C d leaf^-1)
E1	93.57 b
E2	82.14 c
E3	106.60 a
E4	88.59 b
E5	115.53 a
E6	93.98 b
E7	76.06 c
E8	76.86 c
E9	62.20 d
E10	44.49 e
E11	49.60 e
E12	23.24 f
Mean	76.07

Sowing date	Simulation model	Tests
Sowing date	Simulation model	RMSE	BIAS	r	SD	SD_obs	MSE	F
E6	FIL	0.5995	0.0145	0.9941	4.62^ns	4.92	0.36	ns
E6	WE	2.1374	-0.1757	0.9941	3.74^ns	4.92	4.57	ns
E7	FIL	1.6223	-0.1101	0.9963	4.40^ns	5.59	2.63	ns
E7	WE	3.1595	-0.2595	0.9962	3.66^ns	5.59	9.98	ns
E8	FIL	1.6163	-0.1207	0.9971	4.70^ns	5.62	2.61	ns
E8	WE	3.3703	-0.2710	0.9971	3.89^ns	5.62	11.36	ns
E9	FIL	1.9433	-0.1362	0.9956	5.02^ns	6.07	3.78	ns
E9	WE	3.8241	-0.2857	0.9959	4.14^ns	6.07	14.62	ns
E10	FIL	2.3739	-0.1455	0.9927	4.44^ns	5.92	5.64	ns
E10	WE	4.1729	-0.2901	0.9910	3.80^ns	5.92	17.41	ns
E11	FIL	0.8735	-0.0222	0.9846	4.79^ns	4.94	0.76	ns
E11	WE	2.0926	-0.1739	0.9994	4.19^ns	4.94	4.38	ns
E12	FIL	1.5002	0.0867	0.9947	4.18^ns	5.34	2.25	ns
E12	WE	1.8837	-0.0660	0.9916	3.62^ns	5.34	3.55	ns

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[1] Mábele de C. Ferreira - E-mail: mabeleferreira@yahoo.com.br(Corresponding author)