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Search Results: 1 - 10 of 548457 matches for " M?nica Sartori de;Vivian "
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Nitrogênio e boro na produ??o e incidência de haste oca em couve-flor 'Sharon'
Mello, Simone da Costa;Camargo, Mnica Sartori de;Vivian, Rafael;Nascimento, Thaisa Sampaio;Oliveira, érica Santos de;Bertanha, Raphael;
Bragantia , 2009, DOI: 10.1590/S0006-87052009000300024
Abstract: the objective was evaluate nitrogen (100, 150, 200 and 250 kg ha-1) and boron rates (0; 1.5 kg ha-1 at planting and 1.5 kg ha-1 after 45 transplanting days and 3.0 kg ha-1 at planting) on yield and hollow stem disorder of cauliflower 'sharon' in blocks randomized in factorial design with four replications. the experiment was carried out in field conditions, in piracicaba, s?o paulo state, at nitossolo vermelho eutrófico soil during november/2005 until march/2006. the nitrogen and boron did not effect on commercial and total yield, inflorescence mass, n and b levels of leaves and inflorescences. hollow stem incidence was reduced by b application.
Aduba??o nitrogenada e potássica do Aster ericoides cultivado em ambiente protegido
Camargo, Mnica Sartori de;Mello, Simone da Costa;Carmello, Quirino Augusto de Camargo;
Horticultura Brasileira , 2008, DOI: 10.1590/S0102-05362008000200012
Abstract: the aster ericoides is a cut flower crop recently introduced into brazil. it has great production potential and acceptation by consumer market but exist little information about fertilization management, essential to its development and quality. in this work we evaluated the nitrogen and potassium fertilization on dry matter yield and nutrient absorption by aster ericoides (white master) growing in a typic hapludox soil under greenhouse conditions. the experiment was set up in a completely randomized design factorial scheme (4 x 4) with 4 rates of n (0; 50; 75 and 100 kg ha-1 n), 4 rates of k (0; 52; 78; 104 kg ha-1 k2o) and 4 replicates at second cycle of culture. the population was maintained at 400,000 plants per hectare. after 105 days, ten stems of each plot were harvested. the stem and leaf dry matter production, number of flowers in each stem and number of principal lateral shoots in each stem were not influenced by treatments. the rate of 46 kg ha-1 of n resulted in maximum flower dry matter production (19.40 g plant-1) and potassium fertilization did not influence the evaluated characteristics. these results showed how necessary it is to be careful with n and k fertilization in this type of soil, to avoid reduced flower dry matter production. more studies about nitrogen and potassium fertilization should be done to define adequate recommendations for aster ericoides planting under tropical conditions.
Silicon sources for rice crop
Pereira, Hamilton Seron;Kornd?rfer, Gaspar Henrique;Vidal, Anelisa de Aquino;Camargo, Mnica Sartori de;
Scientia Agricola , 2004, DOI: 10.1590/S0103-90162004000500010
Abstract: although silicon is not an essential nutrient, its application is beneficial for plant growth and development. to evaluate silicon sources in relation to agronomic efficiency and economic viability in rice crops (oryza sativa l.), a greenhouse experiment was conducted, quartzipsamment soil, in a completely randomized experimental design (n = 4). treatments were 12 silicon sources and a control. silicon was applied at the rate of 125 kg si ha-1. data were compared to a standard response curve for si using the standard source wollastonite at rates of 0, 125, 250, 375, and 500 kg si ha-1. all treatments received caco3 and mgco3 to balance ph, ca and mg. one hundred and fifty days after sowing, evaluations on dry matter yield in the above-ground part of plants, grain yield, and si contents in the soil and plant tissues were performed. wollastonite had linear response, increasing silicon in the soil and plants with increasing application rates. differences between silicon sources in relation to si uptake were observed. phosphate slag provided the highest si uptake, followed by wollastonite and electric furnace silicates which however, did not show differed among themselves. the highest si accumulation in grain was observed for stainless steel, which significantly differed from the control, silicate clay, wollastonite, and af2 (blast furnace of the company 2) slag. silicate clay showed the lowest si accumulation in grain and did not differ from the control, af2 slag, af1 slag, schist ash, schist, and ld4 (furnace steel type ld of the company 4) slag.
Silicon sources for rice crop
Pereira Hamilton Seron,Kornd?rfer Gaspar Henrique,Vidal Anelisa de Aquino,Camargo Mnica Sartori de
Scientia Agricola , 2004,
Abstract: Although silicon is not an essential nutrient, its application is beneficial for plant growth and development. To evaluate silicon sources in relation to agronomic efficiency and economic viability in rice crops (Oryza sativa L.), a greenhouse experiment was conducted, Quartzipsamment soil, in a completely randomized experimental design (n = 4). Treatments were 12 silicon sources and a control. Silicon was applied at the rate of 125 kg Si ha-1. Data were compared to a standard response curve for Si using the standard source Wollastonite at rates of 0, 125, 250, 375, and 500 kg Si ha-1. All treatments received CaCO3 and MgCO3 to balance pH, Ca and Mg. One hundred and fifty days after sowing, evaluations on dry matter yield in the above-ground part of plants, grain yield, and Si contents in the soil and plant tissues were performed. Wollastonite had linear response, increasing silicon in the soil and plants with increasing application rates. Differences between silicon sources in relation to Si uptake were observed. Phosphate slag provided the highest Si uptake, followed by Wollastonite and electric furnace silicates which however, did not show differed among themselves. The highest Si accumulation in grain was observed for stainless steel, which significantly differed from the control, silicate clay, Wollastonite, and AF2 (blast furnace of the company 2) slag. Silicate clay showed the lowest Si accumulation in grain and did not differ from the control, AF2 slag, AF1 slag, schist ash, schist, and LD4 (furnace steel type LD of the company 4) slag.
Solubilidade do silício em solos: influência do calcário e ácido silícico aplicados
Camargo, Mnica Sartori de;Kornd?rfer, Gaspar Henrique;Pereira, Hamilton Seron;
Bragantia , 2007, DOI: 10.1590/S0006-87052007000400014
Abstract: silicon has been utilized in brazilian agriculture, specially after its inclusion in regulations concerning fertilizers. however, there are few studies on si solubility in tropical soils, which is important for silicate fertilization. soluble silicon was evaluated in clayey (lvd, lvad, nvef), loamy (pvae, lvd, lvad) and sandy soils (rqo) treated with lime (0, 2, 4 e 6 mg ha-1) and silicic acid (0 e 400 mg kg-1), with 4 replications. the soil samples were dried and passed through sieve (50 mesh), placed in pots (250 g) with the treatments and incubated during 90 days (80 % of holding moisture capacity). the 0.5 mol l-1 acetic acid (aa) extracted more silicon than water (a) and 0.01 mol l-1 cacl2 (cc). si contents were higher in clayey than in loamy and sandy soils and b horizon had more silicon than a horizon in latosols. there was effect of lime decreasing potencial acidity and increasing ph(cacl2), ca, and aa extractable silicon contents in all soils. cc and a extractable si increased in loamy and sandy soils and decreased clayey soils. studies with plants to determinate suitable extractants for available si are needed, especially in oxidic soils, where increasing ph decreases si solubility.
Reatividade de escórias silicatadas da indústria siderúrgica
Pereira, Hamilton Seron;Gama, Ailton Junio Manzi;Camargo, Mnica Sartori de;Korndorfer, Gaspar Henrique;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000200016
Abstract: the slags are used in the agriculture as soil acidity correctives in same rates of lime, but there are few studies about its reactivity in soils. the objective was to compare slag reactivity to soil acidity correction and calcium, magnesium, and silicon liberation. a completely randomized experimental design was used, with 4 repetitions in factorial with 6 sources (blast furnace slag 1, phosphate slag, blast furnace slag 2, aod furnace steel slag, stainless steel slag and ld furnace steel slag) and 5 particle sizes (2-1.41; 1.41-0.85; 0.85-0.50; 0.50-0.30 mm and < 0,30 mm) and two additional treatments (control and caco3). the caco3 was used as a pattern for the determination of the reactivity index of each source. all treatments received 1500 mg kg-1 of equivalent caco3 and each rate of slags was calculated by its determined neutralization power. the ph-value increased with reduction of particle size in all slags. the phosphate slag showed best efficiency on the liberation of ca + mg compared to the calcium carbonate in the granulometrics inferior to 0.5 mm. there was low efficiency in soil acidity correction and liberation of the ca and mg in soil to slag of blast furnace. it is necessary to use particles smaller than 0.3 mm to improve silicon availability of phosphate slag and particles between 0.85 and 1.41mm to stainless steel slag. the silicon availability of aod furnace steel slag and ld furnace steel slag were not influenced by particle size.
Aduba??o fosfatada e metais pesados em Latossolo cultivado com arroz
Camargo, Mnica Sartori de;Anjos, Ana Rosa Martins dos;Rossi, Carla;Malavolta, Eurípedes;
Scientia Agricola , 2000, DOI: 10.1590/S0103-90162000000300022
Abstract: the contribuition of phosphate fertilizers to the pool of heavy metals in the soil and their transfer to plants and animals is a subject of concern specially among envirommentalists. the objective of this study was to assess the accumulation of heavy metals contained in phosphate fertilizers in the rice plant using a simple sequential method of extraction which could provide information about the availability of heavy metals in the soil. greenhouse and laboratory experiments used a xantic ferralsol previously cultivated with centrosema pubescens and brachiaria decubens. the forages received triple superphosphate, termophosphate and north caroline and arad rock phosphates at the rates of 50, 100 and 200 mg dm-3 p. there was no increase in heavy metals (cu, mn, cd, ni, zn) in the soil or in plants due to the rates of phosphate fertilizers applied. as expected, 6 mol l-1 hcl extracted higher amounts of heavy metals than mehlich 1 and water extractant.
Aduba o fosfatada e metais pesados em Latossolo cultivado com arroz
Camargo Mnica Sartori de,Anjos Ana Rosa Martins dos,Rossi Carla,Malavolta Eurípedes
Scientia Agricola , 2000,
Abstract: A avalia o da contamina o por metais pesados contidos nos fertilizantes tem atraído a aten o devido a um eventual efeito no ambiente. O objetivo do trabalho foi estudar a absor o de metais pesados presentes nos adubos fosfatados pelo arroz, utilizando-se uma metodologia de extra o seqüencial passível de ser adaptada à análise de rotina. O delineamento experimental foi em blocos casualizados e utilizaram-se quatro fontes de P (superfosfato triplo, termofosfato magnesiano e fosfatos naturais da Carolina do Norte e de Arad) em três doses (50, 100 e 200 mg dm-3). Foram cultivadas plantas de arroz após o cultivo de Brachiaria decumbens e Centrosema pubescens em Latossolo Vermelho-Amarelo distrófico, em condi es de casa-de-vegeta o. A transferência de metais pesados (Cu, Mn, Cd, Ni, Zn) para o solo e para as plantas ocorreu de forma diferenciada para as doses e fontes utilizadas. Os adubos fosfatados n o contribuíram de modo relevante para o aumento do teor de metais pesados no solo e nas plantas. Na extra o seqüencial, o HCl 6 mol L-1 extraiu maior percentual de metais pesados do solo, seguido por Mehlich 1 e H2O, exceto para Zn.
Produtividade e podrid?o parda em couve-flor de inverno influenciadas pelo nitrogênio e boro
Camargo, Mnica Sartori de;Mello, Simone da Costa;Foltran, Dulcinéia Elizabete;Carmello, Quirino Augusto de Camargo;
Bragantia , 2008, DOI: 10.1590/S0006-87052008000200012
Abstract: the hollow stem disorder is a common problem in cauliflower, resulting in similar symptom to b deficiency. its occurrence is associated, specially to nitrogen and boron rates. there is few information about this subject in brazil. the experiment was carried out from march to june/2006 in a randomized complete block design with 4 replications. the objective was to evaluate rates of nitrogen (100, 150, 200 and 250 kg ha-1) and b aplication (0 and 3 kg ha-1) on yield and hollow stem disorder of the cauliflower ?júlia? cultivated in kandiustalf at tietê region, s?o paulo state, brazil. the curd diameter was not influenced by treatments and corresponding mean value was 17.74 cm. nitrogen levels increased mean weight, yield and n content of curds. fertilization increased boron contents in curds, commercial yield and reduced hollow stem disorder. there was a negative correlationship between b concentration at curds and hollow stem disorder incidence. therefore, to reduce this physiological disorder the boron fertilization is required when cauliflower is grown even in soil with average b level.
Yacon Product (PBY) Modulates Intestinal Constipation and Protects the Integrity of Crypts in Wistar Rats  [PDF]
Mnica de Souza Lima Sant’Anna, Vivian Carolina Rodrigues, Tatiane Ferreira Araújo, Tania Toledo de Oliveira, Maria do Carmo Gouveia Pelúzio, Célia Lúcia de Luces Fortes Ferreira
Food and Nutrition Sciences (FNS) , 2018, DOI: 10.4236/fns.2018.912101
Abstract: This study investigated the use of a product based on yacon (PBY) in microbiological, physical-chemical and intestinal characteristics of Wistar rats artificially constipated with Loperamide®. Thirty-two rats were divided into four groups: Control (C), Constipated Control (CC), PBY (not constipated) and Constipated PBY (PBYC). The dosage of 0.14 g of FOS+ inulin/kg was tested. Microbiota, pH and faeces characteristics of faeces and caecal contents were evaluated. Caecal weight, morphometry of caecal villi and the concentration of short-chain fatty acids were determined. Higher caecal weight was identified in the PBYC animals as well as higher width, height and depth of cripts. The PBY group showed the highest (p < 0.05) concentration of butyrate (93.2 ± 65.5 mmol/L). The supplementation with PBY positively altered the intestine epithelial tissue in constipated animals, keeping the integrity of the caecum crypts.
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