Efeito da colheita seletiva de madeira sobre algumas características físicas de um latossolo amarelo sob floresta na Amazônia Central

Fire‐Free Fallow Management by Mechanized Chopping of Biomass for Sustainable Agriculture in Eastern Amazon: Effects on Soil Compactness, Porosity, and Water Retention and Availability

“…Percentage of pores with less than 0·03‐mm diameter was either increased or remained unchanged (Figure ). These results corroborate those of Mello‐Ivo and Ross () and Pires et al . (), who observed that wheeling changes pore‐size distribution by reducing the proportion of large pores and increasing the proportion of small and medium pores.…”

Relações do parâmetro S para algumas propriedades físicas de solos do sul do Brasil

“…A maior quantidade de material orgânico na superfície, conseqüência do maior crescimento de raízes e incorporação de liteira, justifica a menor Ds na camada mais superficial de solos sob floresta (Mello Ivo & Ross, 2006). Verificou-se que os valores do parâmetro S foram maiores no solo sob floresta, quando comparados aos solo cultivado em plantio direto (Quadro 3).…”

Mid-term effects of reduced-impact logging on the regeneration of seven tree commercial species in the Eastern Amazon

“…Canopy opening increases the density and growth rates of both light-demanding (Nabe-Nielsen et al, 2007) as well as shade-tolerant species (Toledo-Aceves et al, 2009). On the other hand, soil compaction caused by heavy machinery may have a negative effect due to impediment of water infiltration and root penetration of seedlings and saplings (Van Rheenen et al, 2004;Mello-Ivo and Ross, 2006). Furthermore, large canopy openings can promote invasion of non-commercial tree species and lianas, thus increasing competition with seedlings and saplings of valuable species (Fredericksen and Mostacedo, 2000).…”