Ash content, carbon and C/N ratio in paricá in function of NPK fertilization

VIEIRA, CRISTIANE R.; WEBER, OSCARLINA L.S.; SCARAMUZZA, JOSÉ FERNANDO

doi:10.1590/0001-3765201820150519

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Agrarian Sciences • An. Acad. Bras. Ciênc. 90 (01) • Jan-Mar 2018 • https://doi.org/10.1590/0001-3765201820150519 copy

Ash content, carbon and C/N ratio in paricá in function of NPK fertilization

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Fertilization in areas of forest plantations is needed to supplement plants´ nutritional needs until harvest. An experiment was performed to check the influence of fertilization on levels of ash, carbon and C/N relation in Schizolobium amazonicum. Soil liming was performed and fertilization occurred after 15 days of incubation. S. amazonicum seedlings were produced and submitted to fertilization with N, P and K: N = 0, 40, 80 and 120 kg ha^-1; P₂O₅ = 0, 50, 100 and 200 kg ha^-1; K₂O = 0, 50, 100 and 200 kg ha^-1. The plants were measured after 180 days. The seedlings of 20 treatments with the highest increase in height and diameter were transplanted to the field. Soil was fertilized and limestone was spread; seedlings were distributed into randomized blocks, with six replications. After 12 months, the plants were removed to determine ash, organic carbon, C/N relation contents. The ashes were submitted to digestion to determine nutrient concentrations. Fertilization influenced the levels of ash and organic carbon and C/N relation in S. amazonicum. Results indicate that the species has a potential for energy production.

Key words:
Forest nutrition; inorganic compounds; Schizolobium amazonicum; vegetal charcoal

pH	H+Al	Al	Ca²⁺	Mg²⁺	K	P	SB	T(pH7.0)	t	V%	m%
CaCl₂	cmol_c dm^-³			mg dm^-³			cmol_c dm^-³
4.39	4.22	1.03	1.0	0.50	13.56	13.9	1.53	5.75	2.56	26.5	40.2

Treatment	In field	N-P-K	Height (cm)	Diameter (mm)
1	B1T1	0-0-0	58	6.6
2	B1T10	0-100-50	82	7.3
3	B1T11	0-100-100	84	8.4
4	B1T13	0-200-0	93	9.2
5	B1T16	0-200-200	64	7.9
6	B1T15	0-200-100	88	9.1
7	B1T14	0-200-50	78	7.1
8	B2T13	40-200-0	92	7.9
9	B2T16	40-200-200	78	8.7
10	B2T15	40-200-100	92	9.2
11	B3T8	80-50-200	89	8.6
12	B3T2	80-0-50	90	10.3
13	B3T3	80-0-100	78	8.4
14	B3T4	80-0-200	83	8.3
15	B3T5	80-50-0	63	7.6
16	B3T7	80-50-100	80	9.5
17	B3T14	80-200-50	66	7.8
18	B3T15	80-200-100	80	12.1
19	B4T4	120-0-200	79	5.2
20	B4T7	120-50-100	90	7.7

Treatment	NPK	Ash rates	Carbon	C/N
T1	0-0-0	0.85 a	61.04 a	304.37 a
T2	0-100-50	0.84 a	60.38 a	342.22 a
T3	0-100-100	0.88 a	60.35 a	317.24 a
T4	0-200-0	0.89 a	56.57 a	360.08 a
T5	0-200-200	0.93 a	59.86 a	379.52 a
T6	0-200-100	0.83 a	60.17 a	369.85 a
T7	0-200-50	0.84 a	59.73 a	421.83 a
T8	40-200-0	0.87 a	57.98 a	364.35 a
T9	40-200-200	0.93 a	58.99 a	284.52 a
T10	40-200-100	0.87 a	61.42 a	361.04 a
T11	80-50-200	0.86 a	62.82 a	116.94 b
T12	80-0-50	0.82 a	61.62 a	142.74 b
T13	80-0-100	0.82 a	58.65 a	166.26 b
T14	80-0-200	0.85 a	58.22 a	246.70 b
T15	80-50-0	0.68 b	61.77 a	216.31 b
T16	80-50-100	0.92 a	59.06 a	317.28 a
T17	80-200-50	0.93 a	60.90 a	333.67 a
T18	80-200-100	0.90 a	59.36 a	190.98 b
T19	120-0-200	0.84 a	51.90 b	172.91 b
T20	120-50-100	0.90 a	51.64 b	128.56 b
CV (%)		8.90	5.77	35.87

Treat.	NPK	N	P	K	Ca	Mg	B
T1	0-0-0	1.30 d	3.70 c	0.50 i	2.25 b	0.60 a	28.55 b
T2	0-100-50	0.70 d	1.15 c	0.00 j	1.00 c	0.35 a	6.67 c
T3	0-100-100	1.32 d	10.07 b	4.30 f	3.75 a	0.55 a	14.65 c
T4	0-200-0	1.47 d	8.55 b	2.35 h	3.82 a	0.45 a	11.85 c
T5	0-200-200	0.70 d	26.95 a	21.00 a	5.15 a	0.70 a	9.70 c
T6	0-200-100	1.32 d	5.30 c	1.20 i	2.80 b	0.50 a	7.72 c
T7	0-200-50	1.27 d	3.77 c	0.77 i	2.22 b	0.40 a	9.97 c
T8	40-200-0	1.37 d	4.15 c	3.00 g	2.87 b	0.65 a	5.75 c
T9	40-200-200	1.37 d	8.35 b	19.65 b	4.47 a	0.45 a	5.30 c
T10	40-200-100	0.77 d	4.92 c	6.10 e	3.57 a	0.25 a	24.50 b
T11	80-50-200	4.60 b	2.90 c	2.15 h	3.62 a	0.70 a	9.72 c
T12	80-0-50	1.37 d	1.35 c	0.05 j	1.55 c	0.50 a	12.60 c
T13	80-0-100	0.95 d	0.42 c	0.00 j	0.85 c	0.70 a	13.07 c
T14	80-0-200	1.47 d	1.50 c	0.40 j	1.65 c	0.35 a	10.15 c
T15	80-50-0	2.00 c	2.55 c	0.90 i	2.22 b	0.50 a	11.92 c
T16	80-50-100	1.35 d	1.52 c	0.65 i	1.85 c	0.30 a	11.65 c
T17	80-200-50	1.95 c	11.12 b	14.90 c	3.70 a	0.50 a	10.52 c
T18	80-200-100	2.15 c	2.90 c	9.55 d	2.52 b	0.65 a	13.10 c
T19	120-0-200	5.70 a	3.47 c	4.15 f	3.67 a	0.65 a	15.10 c
T20	120-50-100	4.20 b	3.35 c	6.60 e	3.80 a	0.30 a	50.90 a
CV (%)		28.74	50.57	7.81	32.88	62.98	47.84

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[1] Correspondence to: Cristiane Ramos Vieira E-mail: cris00986@hotmail.com