Nutrient Input via Incident Rainfall in a <i>Eucalyptus dunnii</i> Stand in the Pampa biome

Dick, Grasiele; Schumacher, Mauro Valdir; Momolli, Dione Richer; Viera, Márcio

doi:10.1590/2179-8087.055916

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Original Article, Silviculture • Floresta Ambient. 25 (3) • 2018 • https://doi.org/10.1590/2179-8087.055916 copy

Nutrient Input via Incident Rainfall in a Eucalyptus dunnii Stand in the Pampa biome

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

We evaluated the nutrient input via incident rainfall in a Eucalyptus dunnii stand in the Brazilian Pampa biome. During the two-year study, we analyzed nutrient concentrations in incident rainfall (P), throughfall via drip (Pi), and stemflow (Et). Ion concentrations (NO₂^-, NO₃^-, PO₄^3- , SO₄^2-, Cl^-, K⁺, Ca²⁺ , and Mg²⁺) were determined from the aqueous solution, and based on the water volume, the quantity per hectare (kg ha^-1) was estimated for each element. Statistical differences observed by ANOVA and separation of means contrasts were subjected to Tukey’s test (5%), adopting a completely randomized design. Higher concentrations of SO₄ ^2- in P; NO₃- in Pi solution, and K⁺, Ca²⁺ , Mg²⁺, and Cl^- in Et were observed. Greater amounts of nutrients such as Cl^-, K⁺, Ca²⁺, and SO₄² were incorporated via Pi.

Keywords:
forest hydrology; forest nutrition; geochemical cycling

Month	P₁₂	P₁₃	Pi₁₂	Pi₁₃	Et₁₂	Et₁₃
Month			mm
Jan	6.37±0.45 b ^* * Values followed by the same letter in the row for 2012 and 2013, considering the different precipitation flows, do not differ statistically by Student’s t -test, at 5% error probability level.	102.39±2.34 a	5.95±0.33 b	88.64±1.15 a	0.02±0.001 b	0.69±0.09 a
Feb	106.63±0.90 b	162.76±1.32 a	93.95±4.91 b	148.57±7.69 a	0.49±0.17 a	0.62±0.44 a
Mar	0 b	180.59±0.80 a	0 b	170.75±2.31 a	0 b	2.37±0.48 a
Apr	106.71±16.54 a	131.14±0.63 a	102.92±6.98 a	113.69±1.31 a	0.96±0.29 a	1.24±0.25 a
May	31.51±0.45 b	194.49±0.63 a	26.77±2.09 b	181.49±2.87 a	0.23±0.06 b	0.82±0.23 a
Jun	57.45±0.67 b	71.09±0.48 a	53.05±3.39 a	61.38±2.34 a	0.48±0.23 a	1.02±0.36 a
Jul	82.44±4.50 b	131.15±1.80 a	68.77±2.57 b	121.35±7.56 a	0.62±0.27 a	1.32±0.41 a
Aug	147.85±0.96 a	58.09±0.67 b	142.89±2.80 a	48.22±4.50 b	1.48±0.58 a	0.35±0.14 b
Sep	72.15±0.18 a	34.85±1.57 b	63.45±0.52 a	29.55±2.41 b	0.61±0.10 a	0.18±0.06 b
Oct	180.42±2.83 a	89.60±2.92 b	163.87±0.60 a	83.43±3.63 b	2.56±0.04 a	3.23±0.84 a
Nov	12.57±0.42 b	456.77±10.80 a	9.96±0.21 b	427.62±11.43 a	0.05±0.03 b	8.79±1.43 a
Dec	330.33±1.50 a	24.03±1.35 b	301.71±7.80 a	22.77±1.54 a	2.90±0.18 a	0.35±0.07 b
Total	1134.43	1636.95	1033.29	1497.46	10.40	20.98

	P₁₂	P₁₃	Pi₁₂	Pi₁₃	Et₁₂	Et₁₃
pH	5.44±0.71A ^{^} Values followed by the same capital letter in the row do not differ statistically in 2012 by Tukey’s test, at a 5% error probability level;	4.31±0.37b ^{^} Values followed by the same lowercase letter in the line did not differ statistically in 2013 by Tukey’s test, at 5% error probability.	5.78±0.47A	5.00±0.44a	5.30±0.61A	5.30±0.42a
Ions			mg L^-1
NO₂^-	0.02±0.01B	0.02±0.01a	0.09±0.09A	0.01±0.01a	0.31±0.75A	0.02±0.02a
NO₃^-	0.16±0.20B	0.08±0.06b	0.47±0.45A	0.23±0.19a	0.25±0.29B	0.02±0.03b
PO₄^3-	0.07±0.05B	0.11±0.00a	0.05±0.05B	0.02±0.00b	0.14±0.30A	0.07±0.12a
K⁺	0.41±0.30C	0.17±0.09c	2.07±1.56B	0.96±0.34b	11.65±12.19A	10.64±7.37a
Ca²⁺	1.78±1.69B	0.60±0.43b	2.26±1.68A	1.22±0.48a	2.08±1.54A	2.05±1.45a
Mg²⁺	0.14±0.12B	0.11±0.14b	0.50±0.37B	0.32±0.27b	2.33±2.30A	2.42±1.88a
SO₄^2-	0.97±0.55A	0.53±0.35a	1.39±1.12A	0.88±0.58a	0.92±1.19A	0.46±0.37a
Cl^-	1.92±2.26B	0.51±0.33c	2.63±2.22B	1.84±0.87b	10.62±12.47A	8.31±7.60a

Ions	P₁₂	P₁₃	Pi₁₂	Pi₁₃	Et₁₂	Et₁₃
NO^2-	0.20 a	0.08 b	0.47 a	0.07 b	0.002 a	2x10^-4 b
NO^3-	1.36 a	0.50 b	2.35 a	1.25 b	0.012 a	7x10^-4 b
PO₄^3-	0.10 a	0.15 a	0.26 a	0.12 b	0.002 b	0.005 a
K⁺	3.33 a	1.84 b	13.90 a	7.74 b	0.631 a	0.970 a
Ca²⁺	10.84 a	8.00 b	16.04 a	11.87 a	0.122 a	0.225 b
Mg²⁺	0.83 a	1.94 b	2.68 a	3.70 a	0.097 b	0.183 a
SO₄^2-	7.49 a	6.04 a	8.05 a	5.96 a	0.051 a	0.045 a
Cl^-	8.77 a	4.14 b	14.15 a	13.35 a	0.437 a	0.568 a

Instituto de Florestas da Universidade Federal Rural do Rio de Janeiro Rodovia BR 465 Km 7, CEP 23897-000, Tel.: (21) 2682 0558 | (21) 3787-4033 - Seropédica - RJ - Brazil
E-mail: floram@ufrrj.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Grasiele DickDepartamento de Ciências Florestais, Universidade Federal de Santa Maria – UFSM, Av. Roraima, 1000, Camobi, CEP 97105-900, Santa Maria, RS, Brasil e-mail: grasidick@hotmail.com