23 results

Fertilization strategies to improve phosphorus availability and soil quality in integrated crop-livestock system in tropical soils

Gabriela Castro Pires ORCID logo , Lenir Fátima Gotz ORCID logo , Lucas Aquino Alves ORCID logo , Laércio Santos Silva ORCID logo , Jorge Pereira Gama ORCID logo , Luiz Gustavo de Oliveira Denardin ORCID logo , [...]

13/Oct/2025

ABSTRACT Exploring different fertilization strategies in an integrated crop-livestock system (ICLS) can enhance soil phosphorus (P) availability and improve soil quality, ultimately leading to higher yield. This study aimed to evaluate different fertilization strategies in ICLS and their effects on soil P fractions, soil quality and soybean grain yield in a tropical soil. Initiated in 2019, the experiment tested four fertilization strategies: 1) Conventional fertilization with P and K applied at soybean sowing (CF); 2) CF + N fertilization in […]

Soil CO2 Efflux Measurements by Alkali Absorption and Infrared Gas Analyzer in the Brazilian Semiarid Region

Carlas Renata Prissila Costa Ferreira, Antonio Celso Dantas Antonino, Everardo Valadares de Sá Barreto Sampaio, Karina Guedes Correia, José Romualdo de Sousa Lima, Willames de Albuquerque Soares, [...]

10/Jan/2018

ABSTRACT The CO2 emission from the soil surface, commonly referred to as soil CO2 efflux (ECO2) or soil respiration, is the sum of processes that include root respiration and microbial activity. Measuring this evolution is important to establish sustainable land use models and to estimate global fluxes of carbon, which affect climate change. Despite its importance, few measurements have been made in areas of the semiarid Brazilian Northeast region, and most of them were made using the alkali absorption method […]

Land Use and Changes in Soil Morphology and Physical-Chemical Properties in Southern Amazon

Vander Freitas Melo, Alessandro Góis Orrutéa, Antônio Carlos Vargas Motta, Samara Alves Testoni

21/Jul/2017

ABSTRACT Many Amazonian farmers use the slash-and-burn method rather than fertilization for crop production. The aim of the present study was to evaluate changes in the morphological, physical, and chemical properties of naturally fertile Inceptisols after conversion from native forest to different uses in southern Amazonia, Brazil. Land covered by dense native forest (NF) was split into four areas of 1.0 ha each. Three areas were slashed and burned and then cultivated for 11 years with coffee (CO), secondary forest […]

Mineralization of organic phosphorus in soil size fractions under different vegetation covers in the north of Rio de Janeiro

Joice Cleide de Oliveira Rita, Antonio Carlos Gama-Rodrigues, Emanuela Forestieri Gama-Rodrigues, Francisco Costa Zaia, Danielle Aparecida Duarte Nunes

01/Oct/2013

In unfertilized, highly weathered tropical soils, phosphorus (P) availability to plants is dependent on the mineralization of organic P (Po) compounds. The objective of this study was to estimate the mineralization of total and labile Po in soil size fractions of > 2.0, 2.0-0.25 and < 0.25 mm under leguminous forest tree species, pasture and “capoeira” (secondary forest) in the 0-10 cm layer of a Red-Yellow Latosol after 90 d of incubation. The type of vegetation cover, soil incubation time […]

Soil physicall and chemical properties under different uses of marshland

Antonio Sousa Silva, Ivandro de França da Silva, Leonardo Elias Ferreira, Lucas Borchartt, Mayara Andrade Souza, Walter Esfrain Pereira

01/Aug/2013

The substitution of the native vegetation of marshlands in Paraiba, initially by sugarcane and more recently by pastures, in a strongly undulated relief, has caused serious problems of soil degradation. Currently, some of these pastures are being replaced by plantations of sabiá (Mimosa caesalpiniaefolia Benth). The objective was to analyze the effect of these changes on the soil physical and chemical properties and root development. The experiment was conducted in Areia-PB, in a dystrophic Ultisol. The three treatments were represented […]

Crop residues, light organic matter, carbon and nitrogen storage and remaining phosphorus under different management systems in the cerrado region of Goiás

Roni Fernandes Guareschi, Marcos Gervasio Pereira, Adriano Perin

01/Jun/2012

According to the time of management implementation, the amount of crop residues added to the soil surface can increase in no-tillage systems (NTS) and promote changes in the chemical and physical soil properties. The objective of this study was to quantify the deposition of plant residues on the soil surface (RSS) and variations in the light organic matter (LOM), in C and N stocks, remaining phosphorus (Prem), the soil physical characteristics (particle density (PD), bulk density (BD) and total pore […]

Soil resistance to penetration and forage and root production at different grazing intensities

Marco Aurélio Teixeira Costa, Cássio Antonio Tormena, Simony Marta Bernardo Lugão, Jonez Fidalski, Willian Gonçalves do Nascimento, Flaviane Marcolin de Medeiros

01/Jun/2012

Soil fertilization may be a sustainable strategy for the intensification of grazing, considering that the effects of cattle trampling that are deleterious for the soil physical quality do not affect the productivity and the sustainability of pasture production systems. The purpose of this study was to evaluate the effect of grazing at different intensities of N-fertilized pasture on the soil physical quality and impact on forage and root yield of Panicum maximum cv. IPR-86 Milênio. The experiment was conducted in […]

Load carrying capacity models of an oxisol under different use and management

Bruno Silva Pires, Moacir de Souza Dias Junior, Wellington Willian Rocha, Cezar Francisco Araujo Junior, Rita de Cássia Ribeiro Carvalho

01/Apr/2012

Soil compaction has been identified as one of the main factors causing yield reduction of several crops. The use of the load carrying capacity models to identify management techniques which leads to alterations on soil density is a proven and consolidated methodology. This study was carried out to: a) generate load carrying capacity models for different uses and managements of an Oxisol; b) identify the land use or management that is most susceptible or most resistant to compaction by these […]

Influence of organic-mineral fertilization of an oxisol on soil chemical properties and Bracharia brizantha production

Edmar Andrade Schiavoni, Marlene Cristina Alves, Zigomar Menezes de Souza, Frederick Gonçalves Costa

01/Dec/2011

The use of organic-mineral fertilizer produced by the manufacturing industry of lysine and threonine amino acids can improve the fertility of tropical soils. The objective of this study was to evaluate the influence of different doses of the organic-mineral fertilizer named Ajifer L-14 on chemical properties and on the response with increased production of a forage on a Red Latosol in the northwestern region of São Paulo State, Brazil. A randomized block design was used with seven treatments and four […]

Labile and stable fractions of soil organic matter under management systems and native cerrado

Cícero Célio de Figueiredo, Dimas Vital Siqueira Resck, Marco Aurélio Carbone Carneiro

01/Jun/2010

Soil organic matter can be analyzed on the basis of the different fractions. Changes in the levels of organic matter, caused by land use, can be better understood by alterations in the different compartments. The aim of this study was to evaluate the effect of different management systems on the labile and stable organic matter of a dystrophic Red Latosol (Oxisol). The following properties were determined: total organic C and total N (TOC and TN), particulate organic C and particulate […]

1 2 3