A5036048125- Soil Management and Crop Yield
- Growth and nutrition in plants
- Plant Micronutrient Interactions and Effects
- Crop Yield and Soil Fertility
- Banana Cultivation and Research
- Soil Carbon and Nitrogen Dynamics
- Sugarcane Cultivation and Processing
- Plant nutrient uptake and metabolism
- Agricultural Science and Fertilization
- Heavy metals in environment
- Agronomic Practices and Intercropping Systems
- Agricultural and Food Sciences
- Phosphorus and nutrient management
- Legume Nitrogen Fixing Symbiosis
- Soil and Water Nutrient Dynamics
- Rice Cultivation and Yield Improvement
- Heavy Metals in Plants
- Clay minerals and soil interactions
- Plant Physiology and Cultivation Studies
- Soybean genetics and cultivation
- Aluminum toxicity and tolerance in plants and animals
- Potato Plant Research
- Environmental and biological studies
- Silicon Effects in Agriculture
- Cassava research and cyanide
Universidade de São Paulo
2014-2024
Fundación Universitaria Católica Lumen Gentium
2023
Forest Science and Research Institute
2021
Hospital Universitário da Universidade de São Paulo
2002-2021
University of Minnesota, Waseca
2021
Methodist University of Piracicaba
1999-2019
Ceres
2004-2012
Estación Experimental del Zaidín
2011
Universidad San Pedro
1980-2008
Altera (United States)
2006
Ingestion of vegetables containing heavy metals is one the main ways in which these elements enter human body. Once entered, are deposited bone and fat tissues, overlapping noble minerals. Slowly released into body, can cause an array diseases. This study aimed to investigate concentrations cadmium, nickel, lead, cobalt chromium most frequently consumed foodstuff São Paulo State, Brazil compare metal contents with permissible limits established by Brazilian legislation. A value intake diets...
In soils of tropical climate regions the high acidity and presence exchangeable aluminum (Al3+), associated to low fertility, are main restrainting factors for agricultural production. A laboratory experiment was conducted using 26 different Brazilian regions, investigate soil components, giving emphasis Al their relations with chemical properties. The pH correlated positively P, Ca, Mg, K, BS, CEC V% values, negatively saturation. Al3+ predominant cation in 32% below 5.6. KCl titratable H+...
Abstract A conceptual model of water and solute transport pathways was developed applied to a pasture hillslope in the southwestern Brazilian Amazon basin using select field measurements. Infiltration‐excess or Horton overland flow (HOF), saturation (SOF), groundwater both near‐stream zone upslope were sampled on draining 3·9 hectare for total ten storms during first half rainy season (October–November) 2002. Soil Conservation Service SCS curve number HOF an annual balance zones used...
Given their potential for biological nitrogen fixation, legumes used as green manure are an alternative source of to crops, and can supplement or even replace mineral fertilization. The utilization by sugarcane (Saccharum spp.) fertilized with sunn hemp (Crotalaria juncea L.) ammonium sulphate (AS) was evaluated using the 15N tracer technique. Amounts 195.8 kg 70 N per hectare, respectively, AS were added in following treatments: without AS; manure, -15N; manure-15N manure-15N, AS-15N. Four...
Estudou-se o efeito do cultivo prévio de leguminosas sobre a produtividade e lucratividade da cana-de-açúcar. Foram determinados biomassa, acúmulo nutrientes das leguminosas, ocorrência natural fungos micorrízicos arbusculares, bem como população nematoides gênero Pratylenchus à O experimento foi desenvolvido em Piracicaba (SP), Brasil, solo classificado Argissolo Vermelho-Amarelo distrófico, utilizando-se cultivar cana-de-açúcar (Saccharum spp.) IAC87-3396. As avaliações dos efeitos foram...
O objetivo deste trabalho foi definir a melhor dose e época de aplicação, eficiência utilização do N, utilizando-se uréia marcada com 15N, pelo milho cultivado sob plantio direto, em sucessão à crotalária (Crotalaria juncea), ao milheto (Pennisetum americanum) vegetação espontânea (pousio), um Latossolo Vermelho no Cerrado. delineamento experimental o blocos acaso, 24 tratamentos quatro repetições, esquema fatorial incompleto, 3x3x2 + 6: três doses N (80, 130 180 kg ha-1); sistemas cobertura...
A qualidade dos resíduos vegetais de culturas comerciais e adubos verdes influencia a taxa mineralização/imobilização N o respectivo aproveitamento desse nutriente pelas subseqüentes culturas. Com objetivo avaliar utilização do mineralizado da parte aérea sistema radicular crotalária (Crotalaria juncea) milheto (Pennisetum americanum) palha milho, marcados com 15N, realizou-se um estudo, em casa vegetação, no Centro Energia Nuclear na Agricultura - CENA/USP, Piracicaba (SP), vasos 5 kg solo...
O N é o nutriente absorvido em maior quantidade pelo milho, que mais influencia a produtividade de grãos e manejo complexo. objetivo deste trabalho foi avaliar efeito doses parcelamentos N, na forma uréia 15N, sobre grãos, aproveitamento do fertilizante nativo solo absorvida milho um Latossolo Vermelho. delineamento experimental blocos casualizados com nove tratamentos quatro repetições, compreendido cinco N: 0, 55, 95, 135 175 kg ha-1 aplicando-se 15 semeadura restante diferentes...
A cana-de-açúcar (Saccharum spp.) vem sendo cultivada no Brasil para produção de açúcar e agroenergia. Em seu sistema produção, após um ciclo 4 a 8 anos, é possível rotação com plantas cobertura, antes do replantio, melhoria solo geração renda. Estudou-se caracterização produtividade biomassa leguminosas (como adubos-verdes) girassol (Helianthus annuus L.), ocorrência natural micorrizas, o teor em colmos da IAC 87-3396 viabilidade econômica desse cultivo as opções rotação, quantificação...
A fixação biológica do nitrogênio (FBN) constitui-se em uma valiosa fonte deste nutriente para o feijão comum e, sobretudo, feijão-caupi, tendo sua magnitude influenciada pela disponibilidade de N mineral na solução solo. Os objetivos trabalho foram: avaliar os efeitos doses nitrogênio, forma uréia, sobre a simbiótica N2 e caupi, técnica isotópica, quantificar as contribuições relativas das fontes N2-fixação simbiótica, N-solo N-uréia no desenvolvimento usando como controle soja não...
Abstract In low fertility tropical soils, boron (B) deficiency impairs fruit production. However, little information is available on the efficiency of nutrient application and use by trees. Therefore, this work verified effects soil foliar applications in a commercial citrus orchard. An experiment was conducted with fertigated 4-year-old ‘Valencia’ sweet orange trees ‘Swingle’ citrumelo rootstock. Boron (isotopically-enriched 10B) supplied to once or twice growing season, either dripped...
Legumes as green manure are alternative sources of nitrogen (N) for crops and can supplement or even replace mineral fertilization due to their potential biological fixation (BNF). The utilization by sugarcane (Saccharum spp.) fertilized with sunn hemp (Crotalaria juncea L.) ammonium sulfate (AS) was evaluated using the 15N tracer technique. N added at rate 196 70 kg ha-1 15Nlabeled (SH) (AS), respectively. Treatments were: (i) Control; (ii) AS15N; (iii) SH15N + AS; (iv) SH15N; (v) AS15N SH....
This study was designed to investigate the effects of Azospirillum brasilense and Bradyrhizobium sp. co-inoculation coupled with N application on soil levels in plants (total N, nitrate N-NO3− ammonium N-NH4+), photosynthetic pigments, cowpea plant biomass grain yield. An isotopic technique employed evaluate 15N fertilizer recovery derivation. Field trials involved two inoculations—(i) single (ii) + A. co-inoculation—and four rates (0, 20, 40 80 kg ha−1). The increased uptake (an increase...
One of the main factors limiting agricultural production in tropical climate regions is mainly related to presence exchangeable aluminum (Al3+) highly weathered acid soils. Four methods Al3+ determination extracted with neutral 1 mol L¹ KCl solution were evaluated: three colorimetric (aluminon plus ascorbic acid, and eriochrome cyanine R by FIA) usual titrimetric method back-titration. Surface samples from 20 soils different Brazilian regions, active acidity (0.01 CaCl2 pH) ranging very high...
The interaction of Zn with soil compartments influences its bioavailability and uptake by plants. In this study, rice soybean were cultivated under greenhouse conditions the aim evaluating fractionation in a clayey-textured Typic Hapludox as function rates (4 or 8 mg kg –1 Zn). experiment was conducted until grain filling. Two subsamples (t 1 t 2 ) that referred to seeding flowering stages, collected compared two single extraction schemes, DTPA (Zn DTPAt1 DTPAt2 Mehlich-1 Mt1 Mt2 for...