FERTILIZATION EFFECTS ON <i>EUCALYPTUS PELLITA</i> F. MUELL PRODUCTIVITY IN THE COLOMBIAN ORINOCO REGION

Amezquita, Sandra Patricia Montealegre; Rubiano, Jeimy Andrea Martínez; Barros Filho, Nairam Felix De; Cipriani, Henrique Nery

doi:10.1590/1806-90882018000500002

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Articles • Rev. Árvore 42 (5) • 2018 • https://doi.org/10.1590/1806-90882018000500002 copy

FERTILIZATION EFFECTS ON EUCALYPTUS PELLITA F. MUELL PRODUCTIVITY IN THE COLOMBIAN ORINOCO REGION

EFEITO DA ADUBAÇÃO NA PRODUTIVIDADE DO EUCALYPTUS PELLITA F. MUELL NA REGIÃO DA ORINOQUIA COLOMBIANA

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The Orinoco region, is the one with the largest area for forest development. Nonetheless, some of its soils are acid and characterized by low fertility levels, which has considerably limited plantation productivity. Therefore, this study aimed at assessing the effects of soil fertilizing and liming by using phosphorus and potassium on 34-month-old Eucalyptus pellita productivity. Tests have been carried out at: Villanueva, Casanare; Puerto Lopez, Meta and La Primavera, Vichada, under a random block design with a factor arrangement of 3x3x3, equivalent to: 0, 1 and 3 Mg ha^-1 of dolomitic lime (LIME); 30, 75 and 120 kg ha^-1 of P (P₂O₅) as well as 60, 120 and 180 kg ha^-1 of K (K₂O). Timber productivity volume was assessed 34 months after planting, obtaining significant differences. In Puerto Lopez, LIME effect on E. pellita growth followed a simple linear model, whereas a logarithmic behavior was observed in La Primavera and Villanueva. P₂O₅ effect (p<0.01) on timber volume was observed only in La Primavera, following a square-root model. K₂O did not have a significant effect (p>0.05) on E. pellita growth. The results obtained indicate the positive effect on E. pellita growth in the three areas of study by using doses of approximately 1 Mg ha^-1 of lime; and 120 kg ha^-1 of P₂O₅ in La Primavera.

Keywords:
Lime; Phosphorus; Potassium

Table 1 Chemical and physical properties of the soil at 0 to 20 cm of depth in experimental areas

		Villanueva	Puerto	Primavera
			López
pH H₂O	-	4.63	4.68	4.32
OM	g kg^-1	10.9	5.7	7.2
P	mg kg^-1	3	2.17	1.14
K	cmol_c dm^-3	0.04	0.02	0.02
Ca	cmol_c dm^-3	0.32	0.36	0.28
Mg	cmol_c dm^-3	0.11	0.11	0.09
Al	cmol_c dm^-3	0.72	0.2	0.97
H+Al	cmol_c dm^-3	0.88	0.39	1.3
S	mg kg^-1	2.21	2.47	13.82
Fe	mg kg^-1	134	110	44.38
B	mg kg^-1	0.7	0.6	0.33
Cu	mg kg^-1	1.4	0.7	0.34
Mn	mg kg^-1	3.2	1.3	0.1
Zn	mg kg^-1	0.7	0.6	0.31
Sand	g kg^-1	710	820	540
Silt	g kg^-1	130	70	300
Clay	g kg^-1	160	100	160

Table 2 Analysis of variance of E. pellita volume (m3) at 34 months, as a response to K (kg ha-1 of K2O); LIME (Dolomitic Lime in Mg ha-1) and P (kg ha-1 of P2O5) application. Significant** (α = 0.01).

		La Primavera		Villanueva		Puerto Lopez
Sources of	DF	SS	P value	SS	P value	SS	P value
Variation
Block	2	0.000969	0.025	0.001559	0.000	0.003063	0.028
LIME	2	0.002994	0.000 **	0.004156	0.000 **	0.00526	0.003 **
P	2	0.002279	0.000 **	0.000215	0.286	0.002233	0.07
K	2	0.00038	0.22	0.000126	0.476	0.001147	0.247
LIME *P	4	0.000178	0.832	0.000209	0.648	0.000458	0.885
LIME *K	4	0.000262	0.708	0.000381	0.349	0.002425	0.21
P*K	4	0.000934	0.121	0.000167	0.736	0.001539	0.435
LIME PK	8	0.001248	0.273	0.000653	0.467	0.002531	0.611
Error	52	0.006324		0.004357		0.020735
Total	80	0.015566		0.011824		0.03939
Mean of treatment			0.0429	0.0685		0.0865
CV%			32	17.7		25.6

Sociedade de Investigações Florestais Universidade Federal de Viçosa, CEP: 36570-900 - Viçosa - Minas Gerais - Brazil, Tel: (55 31) 3612-3959 - Viçosa - MG - Brazil
E-mail: rarvore@sif.org.br

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