Litterfall and Nutrient Input in a Degraded Area

Giácomo, Rômulo Guimarães; Alves, Marlene Cristina; Camara, Rodrigo; Pereira, Marcos Gervasio; Arruda, Otton Garcia de; Souto, Sebastião Nilce; Moraes, Mário Luis Teixeira de

doi:10.1590/2179-8087.002816

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Original Article • Floresta Ambient. 24 • 2017 • https://doi.org/10.1590/2179-8087.002816 copy

Litterfall and Nutrient Input in a Degraded Area

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to test the effects of fertilization with organic compost from industrial production of pulp on the litterfall and nutrient input of monospecific plantations in a loan area. The treatments consisted of three doses of the organic compost D₁₀, D₁₅ and D₂₀ (10, 15 and 20 Mg ha^-1, respectively), mineral conventional fertilization (D_AM) and no fertilization (D₀) in land plots (N = 4/treatment/species; 15 x 12 m). Litterfall was monthly collected by two traps (0.72 m²/plot) and sorted out into leaves, twigs, seeds, flowers, fruits and others. We determined the input of nitrogen, phosphorous and potassium. There were no differences among the treatments and between species in terms of total annual litterfall. The higher nutrient input was obtained by D_AM, followed by D₁₀, in both plantations. The annual nutrient input was higher for the litterfall on the E. urograndis plantation.

Keywords:
Eucalyptus urograndis; Mabea fistulifera; nutrient cycling

Treatment	Mabea fistulifera	Eucalyptus urograndis
Treatment	Mg ha^-1 yr^-1
D₀	1.3	0.9
D_AM	2.6	2.6
D₁₀	1.5	1.9
D₁₅	1.2	1.2
D₂₀	1.1	1.5
CV¹ (%)	18.3
CV² (%)	27.8

Treatment	Mabea fistulifera		Eucalyptus urograndis
Treatment	Precipitation (mm)	Temperature (ºC)	Precipitation (mm)	Temperature (ºC)
D₀	r = -0.25^ns	r = -0.03^ns	r = 0.03^ns	r = 0.43^ns
D_AM	r = -0.66^ns	r = -0.30^ns	r = 0.19^ns	r = 0.43^ns
D₁₀	r = -0.60^ns	r = -0.29^ns	r = 0.03^ns	r = 0.38^ns
D₁₅	r = -0.43^ns	r = -0.18^ns	r = 0.08^ns	r = 0.47^ns
D₂₀	r = -0.46^ns	r = -0.15^ns	r = 0.36^ns	r = 0.59^ns

Treatment	Mabea fistulifera			Eucalyptus urograndis
	N	P	K	N	P	K
	------------------------------kg ha^-1 yr^-1------------------------------
D_AM	20.30 Ba	1.40 Aa	14.69 Aa	17.09 Aa	1.40 Aa	16.60 Aa
D₀	10.55 Ac	0.69 Ab	6.80 Ab	10.21 Ab	0.62 Ab	6.01 Ac
D₁₀	12.96 Ab	0.86 Bb	7.08 Bb	15.13 Aa	1.58 Aa	13.50 Aa
D₁₅	9.57 Bc	0.78 Ab	5.57 Bb	12.65 Ab	0.81 Ab	9.06 Ab
D₂₀	9.25 Bc	1.28 Aa	5.35 Bb	14.82 Aa	1.04 Ab	9.95 Ab
CV¹ (%)	5.99	17.43	14.22	5.99	17.43	14.22
CV² (%)	7.95	16.36	10.43	7.95	16.36	10.43

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

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[1] *Marcos Gervasio Pereira Departamento de Solos, Universidade Federal Rural do Rio de Janeiro – UFRRJ BR 465, Km 7, CEP 23890-000, Seropédica, RJ, Brazil e-mail: mgervasiopereira01@gmail.com