ABSTRACT This study analyzed arbuscular mycorrhizal fungi (AMF) activity and soil chemical properties in Aspidosperma pyrifolium , Bauhinia ungulata Caesalpinia pyramidalis ferrea . AMF spores, root colonization, total glomalin‐related protein (T‐GRSP), easily extracted GRSP (EE‐GRSP), were measured four times (July 2019, 2020 December 2020). Significant differences observed T‐GRSP, EE‐GRSP among the plant species across seasons. For properties, we species. During dry season, B. C. had...

Soils under subsistence farming in semi‐arid northeastern Brazil are showing progressive declines soil fertility. In this study, we assessed the effects of on losses organic nutrient pools 10 independent sites that were distributed five districts two states. Each site had adjacent areas dry forest and farming. Areas each land use separated groups different degrees degradation. Group assignment was based history visual observations vegetation‐soil degradation further evaluated using 137 Cs...

This study aimed to evaluate the sorption kinetics of P leaching at 0-10 cm layer a Regosol with and without organic fertilization in Brazilian semi-arid region (SAB). Adsorption, desorption, maximum adsorption capacity (Qmax) were determined columns. The contents crystalline amorphous Fe Al mineralogical crystallographic analyses oxides also determined. desorption phosphate was fast initial stage, slow over time, constant end reaction. Both mechanisms occur sandy soils SAB. Oxides influence...

The management of forest species in the recovery degraded areas semi-arid regions is mainly limited by availability water and nutrients. Thus, objective this research was to evaluate growth, yield, energy characteristics wood two Brazilian region subjected deficient irrigation with sewage effluent drip soil. For this, a field experiment conducted an agroforestry system native Caatinga biome: sabiá (Mimosa caesalpiniifolia Benth) aroeira (Myracrodruon urundeuva Allemão), intercropped forage...

Projections for the Brazilian semi-arid (BSA) region estimate a reduction in water bodies and an increase degraded areas. Recovering soils using treated wastewater (TWW) is strategy to resilience of local population these climatic adversities. This study aimed evaluate impact deficit irrigation with effluent on (geo)chemistry soil BSA. An experiment application TWW was conducted within agroforestry system. The treatments arranged randomized block design were WS0.5 (water supply at 0.5...

The long-term use of manure as a source nutrients can promote phosphorus (P) leaching, especially in sandy soils. aim was to evaluate P mobility from organic and mineral sources columns, linked with the Dystric Xeropsamments adsorption characteristics fertilization regime. mineral, chemical, physical properties samples were characterized, including Langmuir desorption kinetics. determined one leaching experiment, 20 cm soil columns. topsoil (0–10 cm) layer treated (cattle, swine, goat, hen...

Semiarid soils may be poor in organic carbon, a necessary source of energy for soil microorganisms that affect plant growth. Although the addition carbon improve chemical characteristics, concentration humic compounds component vary and composition. We evaluated effect two sources on dystrophic yellow Oxisol cultivated with passion fruit ( Passiflora edulis Sims f. ) irrigated saline water during severe drought Brazilian semiarid region. Soil fertility was seasons. A bovine biofertilizer an...

A fixação biológica de nitrogênio foi avaliada em jureminha (Desmanthus pernambucanus), orelha-de-onça (Macroptilium martii) e feijão-de-rolinha lathyroides) cultivados solos do semiárido da Paraíba, vasos sem com esterco bovino. Foram determinados o número a biomassa nódulos, os teores as proporções (N) fixado (percentual planta derivado ar-%Ndda), pelo método abundância natural, utilizando-se capim-buffel como controle. As leguminosas tiveram nodulação abundante, nos três na ausência ou...

A conversão de áreas caatinga em agricultura e pecuária subsistência é uma das características marcantes da região semi-árida do Nordeste Brasil. O presente estudo investigou o efeito dessa sobre os propágulos fungos micorrízicos arbusculares (FMA) 10 locais diferentes, distribuídos nos Estados Paraíba Pernambuco. Cada local consistiu área vegetação nativa (caatinga) contígua com cultivada, na mesma posição encosta. Amostras solo foram coletadas a intervalos 20-30 m, nas profundidades 0-7,5...

The change in the use of soil causes an imbalance ecosystems, altering chemical and physical properties, which can make their natural recovery unviable. This study aimed to characterize chemically physically Entisol under Caatinga area a 30 years ecological succession stage Semiarid region Paraiba. experiment was carried out at Experimental Station Professor Ignácio Salcêdo, belonging National Institute (INSA), located municipality Campina Grande, state Paraíba, samples were collected 0-10...

A baixa disponibilidade de boro (B) no solo é um dos fatores que mais limita a produção do girassol, planta oleaginosa caracterizada por ampla adaptabilidade climática. O objetivo desta pesquisa foi avaliar influência doses boro, aplicadas em distintas classes solos, desenvolvimento girassol cultivar Hélio 863. As amostras foram coletadas na camada 0-20 cm solos: Argissolo Acinzentado (PAC); Vermelho-Amarelo (PVA); Neossolo Litólico (RL); Vermelho eutrófico (PVe); Flúvico (RY) e Vertissolo...

O objetivo deste trabalho foi estudar, ao longo de dois anos, o efeito residual da adubação orgânica com esterco ou biomassa gliricídia sobre os nutrientes do solo e a produtividade acúmulo pelo milho cultivado isolado (SA) consorciado em aléias (CA). desenvolvido Esperança, PB instalado parcelas subdivididas, arranjadas blocos casualizados, que sistemas (CA) corresponderam aos tratamentos principais esterco, as parcelas-controle, secundários, quatro repetições. A demonstrou maior nas...

ABSTRACT The soil is an important component in the biogeochemical cycling of carbon (C) and nitrogen (N). objective this study was to evaluate changes caused by different types land use on C N stocks areas Cerrado at depths: area under conventional tillage, no-tillage, grazing, eucalyptus native vegetation municipality Luis Eduardo Magalhães, BA, Brazil. highest content found for no-tillage surface layer up 10 cm; however, there a decrease its along depths. Areas had lower values (0-5 cm)...

Os micronutrientes Cu e Zn são importantes para o bom desenvolvimento vegetativo a formação de grãos em cereais. Com objetivo avaliar efeito da aplicação nos atributos crescimento na produção cultura do sorgo realizou-se um experimento ambiente protegido, no qual delineamento foi blocos casualizados, com combinação cinco doses cobre (0, 0,26, 0,90, 1,54 1,80 mg kg-1) zinco 0,32, 1,1, 1,88 2,2 kg-1), combinadas matriz Composto Central Box, perfazendo 9 tratamentos, que foram aplicados três...

A produção de biomassa e as absorções N, P K quatro espécies forrageiras foram comparadas em três solos representativos da região semi-árida Paraíba, cultivadas sem com adubação orgânica. As jureminha (Desmanthus virgatus), orelha-de-onça (Macroptilium martii), feijão-de-rolinha lathyroides) capim buffel (Cenchrus ciliaris); os Neossolo Flúvico, Regolítico Planossolo Háplico a foi realizada esterco bovino (20 Mg ha-1) comparado testemunha. promoveu grandes incrementos na nas acumulações dos...

ABSTRACT With the expansion of agricultural production, native Cerrado areas are replaced with other forms land use. Thus, objective this study was to evaluate changes in physical fractionation organic carbon (C) under different use Cerrado. The treatments, five repetitions, corresponded following use: area conventional tillage, pasture plantation, eucalyptus plantation and vegetation, at depths 0-5, 5-10, 10-15 15-20 cm municipality Luis Eduardo Magalhães, BA, Brazil. highest C contents...

This study aimed to evaluate the effect of treated wastewater application on soil organic matter and phosphorus recovery in a degraded semiarid region Brazil. An experiment was carried out with irrigation five caatinga forest species, which three treatments were applied that consisted variation type volume water soil, being 7 L per week tap water, 14 wastewater. After two years irrigation, samples taken analyzed for phosphorus. The content treatment times higher than superficial layer 8...

A remocao total ou parcial de horizontes superficiais e exposicao camadas subjacentes pode causar danos irreversiveis a fertilidade do solo o aumento da proporcao fragmentos grosseiros que reduz efetivamente volume disponivel para armazenamento agua desenvolvimento raizes. Com objetivo avaliar variabilidade espacial densidade sua influencia na estimativa dos estoques nutrientes solo, foi definido uma malha, coletadas analisadas 80 amostras quanto aos atributos: (Ds), fracao grosseira (fG)...

As Terras Pretas de Índio (TPIs) são unidades solo que apresentam como característica marcante a coloração escura e presença fragmentos cerâmica e/ou líticos artefatos indígenas incorporados à matriz dos horizontes superficiais do solo. O pode ser degradado, por ações naturais, ou humanas, sendo agricultura pecuária as principais atividades humanas causam degradação Desta forma, o objetivo desse trabalho foi avaliar variabilidade espacial atributos físicos terra preta índio sob cultivo...

As macro􀂿tas aquaticas sao muito utilizadas como bioindicadoras de qualidade da agua, pois sua proliferacao ocorre geralmente em mananciais eutro􀂿zados e t...

Aquatic macrophytes are widely used as bioindicators of water quality because their proliferation usually occurs in eutrophic sources and has hit several parts Brazil the world, restricted multiple uses aquatic ecosystems. However, this group plants is able to retain considerable amounts nutrients, presenting high productivity growth rate, thus, a good source biomass for use production substrates. In order evaluate potential hyacinth (Eichhornia crassipes Solms.), lettuce (Pistia stratiotes...