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Search Results: 1 - 10 of 185993 matches for " Edicarlos Damacena de;Costa "
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Estoques de carbono organico e de nitrogênio no solo em sistema de integra??o lavoura-pecuária em plantio direto, submetido a intensidades de pastejo
Souza, Edicarlos Damacena de;Costa, Sergio Ely Valad?o Gigante de Andrade;Anghinoni, Ibanor;Carvalho, Paulo César de Faccio;Andrigueti, Marcelo;Cao, Eduardo;
Revista Brasileira de Ciência do Solo , 2009, DOI: 10.1590/S0100-06832009000600031
Abstract: the potential for adopting crop-livestock systems in southern brazil is high, especially in untilled soybean areas with cover crops in the winter season. the long-term use of this system at different grazing intensities will result in different carbon and nitrogen stocks in the soil due to the different plant and animal residues. this research was conducted to evaluate alterations in total carbon and nitrogen pools and in organic matter fractions in a soil under different grazing intensities under no-tillage. the experiment on a rhodic hapludult (oxisol) was initiated in 2001, after soybean harvest. the treatments were different cattle grazing (black oat + ryegrass) pressures (10, 20 and 40 cm sward height) and an ungrazed treatment in the winter and soybean in the summer, in a randomized block design. soil samples were taken at the beginning of the experiment (may, 2001), after three years (may, 2004) and after six years (may, 2007) to evaluate the content and stocks of organic carbon and nitrogen. moderate grazing intensities (20 and 40 cm plant height) resulted in an increase of total carbon and nitrogen and in the organic matter particulate fraction, similarly to the ungrazed area. however, at the most intensive grazing pressure (10 cm plant height) there were losses in the stocks of these elements and reduction in soil organic matter quality.
Distribui??o de potássio e de raízes no solo e crescimento de milho em sistemas de manejo do solo e da aduba??o em longo prazo
Costa, Sérgio Ely Valad?o Gigante de Andrade;Souza, Edicarlos Damacena de;Anghinoni, Ibanor;Flores, Jo?o Paulo Cassol;Andriguetti, Marcelo Hoerbe;
Revista Brasileira de Ciência do Solo , 2009, DOI: 10.1590/S0100-06832009000500022
Abstract: soil tillage systems can greatly influence potassium and root distribution in the soil and, as a result, affect corn growth and development. to improve the understanding of these interrelationships, a soil was analyzed after 18 years of cultivation under different management systems. a detailed soil sampling was carried out in a clayey red argisol (udult) profile in the beginning of the grain filling stage of corn in the 2006/07 growing season. the experimental design consisted of a completely randomized scheme with two replicates, with the following treatments: conventional tillage (con) and no-tillage (dir) with potassium fertilization: along the rows (fx), broadcast (lan) and in stripes (lin). independently of the soil and fertilizer management, potassium formed gradients from the soil surface downwards and around the corn plant stem. the gradients, however, differed according to the soil management; concentrations were higher at the surface under no-tillage, regardless of the fertilization method. maize roots were concentrated predominantly in the soil surface layer, with greater growth in no-tillage. potassium uptake and maize growth were not associated with k distribution in soil and roots. the efficiency of k use by plants was increased by the broadcast application of potassium fertilizer, regardless of the tillage system.
Soil aggregation in a crop-livestock integration system under no-tillage
Souza, Edicarlos Damacena de;Costa, Sérgio Ely Valad?o Gigante de Andrade;Anghinoni, Ibanor;Carvalho, Paulo César de Faccio;Oliveira, Eric Victor Ferreira de;Martins, Amanda Posselt;Cao, Eduardo;Andrighetti, Marcelo;
Revista Brasileira de Ciência do Solo , 2010, DOI: 10.1590/S0100-06832010000400033
Abstract: grazing intensities can influence soil aggregation, which can be temporarily and permanently affected. the objective of this study was to evaluate the aggregate stability in water at the end of a soybean cycle and during pasture development in a crop-livestock integration system under no-tillage and grazing intensities. the experiment was initiated in 2001, in a dystrophic red latosol, after soybean harvest. treatments consisted of pasture (black oat + italian ryegrass) at heights of 10, 20 and 40 cm, grazed by young cattle, and a control (no grazing), followed by soybean cultivation, in a randomized block design. soil samples were collected at the end of the soybean cycle (may/2007), during animal grazing (september/2007) and at the end of the grazing cycle (november/2007). the grazing period influences aggregate distribution, since in the september sampling (0-5 cm layer), there was a higher proportion of aggregates > 4.76 mm at all grazing intensities. soil aggregation is higher in no-tillage crop-livestock integration systems in grazed than in ungrazed areas.
Biomassa microbiana do solo em sistema de integra??o lavoura-pecuária em plantio direto, submetido a intensidades de pastejo
Souza, Edicarlos Damacena de;Costa, Sérgio Ely Valad?o Gigante de Andrade;Anghinoni, Ibanor;Lima, Christina Venzke Sim?es de;Carvalho, Paulo César de Faccio;Martins, Amanda Posselt;
Revista Brasileira de Ciência do Solo , 2010, DOI: 10.1590/S0100-06832010000100008
Abstract: in integrated crop-livestock systems most of the nutrient supply for a pasture is provided by animal excretions, in the form of manure or urine, stimulating the activity and accumulation of nutrients in the cells. this study was carried out in an integrated crop-livestock system under no-tillage, initiated in 2001, with the objective of evaluating the impact of different winter grazing intensities (black oat + italian ryegrass; 10, 20, and 40 cm, and a no-grazing control treatment) on microbial activity and on carbon, nitrogen and phosphorus concentration and stocks in microbial biomass in the 0-10 cm layer of an oxisol (latosol), in southern brazil, during a grazing cycle. biomass nutrient contents and stocks and microbial activity were affected by grazing intensities and by the season of the grazing cycle. microbial carbon and phosphorus contents increased in the beginning of the grazing cycle in may until the period of high phytomass production in september, after which these contents decreased, following the pasture senescence. on the other hand, microbial nitrogen decreased from may to november, possibly as a result of plant uptake of soil n. integrated crop-livestock systems under no-tillage maintain soil biological quality, and are, under adequate grazing intensity, similar to no-tillage systems without grazing influence. however, at high grazing intensities (10 cm) under water stress, this soil quality is negatively affected.
Carbono organico e fósforo microbiano em sistema de integra??o agricultura-pecuária submetido a diferentes intensidades de pastejo em plantio direto
Souza, Edicarlos Damacena de;Costa, Sergio Ely Valad?o Gigante de Andrade;Lima, Christina Venzke Sim?es de;Anghinoni, Ibanor;Meurer, Egon José;Carvalho, Paulo César de Faccio;
Revista Brasileira de Ciência do Solo , 2008, DOI: 10.1590/S0100-06832008000300035
Abstract: integrated crop-livestock systems have attracted more interest in the last few years due to their capacity of improving stability and sustainability of agricultural systems as compared to more specialized production systems. soil organic carbon content has been used as an indicator of soil sustainability and stability. in this sense, this study aimed to measure the stocks of total organic carbon fractions and phosphorus in the microbial biomass in a rhodic hapludox (oxisol) under integrated crop-livestock system with different grazing intensities in the winter. soil samples were collected in november 2006 in s?o miguel das miss?es, state of rio grande do sul, brazil. the experimental area had been cultivated under no-tillage for 10 years before implementing the integrated system in 2001. the experimental design was completely randomized blocks with three replicates. the treatments consisted of grazing intensities represented by sward heights of 10, 20 and 40 cm during the pasture cycle in winter. this pasture was composed of a black oat (avena strigosa schreb) and italian ryegrass (lolium multiflorum lam.) mix, and a control area with no grazing. total and particulate organic matter (pom) carbon stocks, phosphorus and carbon content in the microbial biomass, as well as microbial biomass activity were evaluated. the total organic stocks carbon were not affected by grazing intensities; however, the stocks of pom carbon were smaller in soils under the highest grazing intensity. the microbial biomass was stimulated at the highest grazing intensity, in which greater root growth was observed. the phosphorus content in the microbial biomass increased linearly with the decrease of the grazing intensity, while an inverse pattern was observed for the microbial biomass. particulate organic matter carbon was more sensitive to changes in soil organic carbon under the experimental pasture management.
Fra es do carbono organico, biomassa e atividade microbiana em um Latossolo Vermelho sob cerrado submetido a diferentes sistemas de manejos e usos do solo = Fractions of organic carbon, biomass and microbial activity in a Rhodic Hapludox under Brazilian cerrados submitted to different soil management
Edicarlos Damacena de Souza,Marco Aurélio Carbone Carneiro,Helder Barbosa Paulino,Carlos Alberto Silva
Acta Scientiarum : Agronomy , 2006,
Abstract: Atributos indicadores da qualidade dos solos s o de difícil avalia o, pois n o se tem parametros adequados para a compara o destes resultados. Com isso busca-se estabelecer atributos que sejam sensíveis ao manejo dos solos e que possam ser utilizados como indicadores de qualidade dos solos. O estudo objetivou avaliar o efeito de diferentes sistemas e usos do solo sobre as fra es do carbono organico, biomassa e atividade microbiana em um Latossolo Vermelho de cerrado. O carbono da fra o leve (CFL) foi maior na área sob cerrado, com as demais áreas sendo semelhantes. A biomassa microbiana (BM) foi severamente afetada pelo manejo do solo, assim como o quociente metabólico. Houve perdas na qualidade do solo, com acentuada perda da biomassa microbiana. A biomassa microbiana, o quociente metabólico, a rela o CFL/COT e a rela o BM/COT, podem serutilizados como indicadores da qualidade do solo, mostrando interferências antrópicas no solo no curto prazo. A área sob pastagem sofreu a maior redu o no estoque de carbono e a área sob sorgo em plantio direto a menor perda. Attributes linked to soil quality are very difficult to evaluate, because there are not adequate parameters to compare the obtained results. For this reason, researchers try to establish parameters thatwould be sensitive to soil management and that would be used as soil quality indicators. The aim of this study was to evaluate the effects of different soil and crop management systems on organic carbon fractions, biomass and microbial activity in a Rhodic Haludox (oxisol) from the Brazilian Cerrados. The light carbon fraction (LCF) was higher in the native cerrado area, comparing to the cropping and tillage systems. Microbial biomass (MB) and metabolic quotient severely decreased by the management treatments. The microbial biomass, the metabolic quotient, the rate LOC/TOC and the rate MB/TOC can be used as indicators of soil quality, which are sensitive to anthropic interferences in the soil in short term. Area under pasture has higher reduction in the pool of carbon and the area with sorghum under no-tillage has smaller carbon loss.
Fitomassa e acúmulo de nitrogênio, em espécies vegetais de cobertura do solo para um Latossolo Vermelho distroférrico de Cerrado = Biomass and nitrogen accumulation in cover crops species used in Brazilian Cerrado
Edicarlos Damacena de Souza,Marco Aurélio Carbone Carneiro,Vera Lúcia Banys
Acta Scientiarum : Agronomy , 2008,
Abstract: Espécies vegetais com alta produ o de fitomassa s o de fundamentalimportancia para o desenvolvimento sustentável do plantio direto no cerrado. Objetivou-se avaliar a produ o de fitomassa e o acúmulo de nitrogênio em 17 espécies vegetais em um Latossolo Vermelho distroférrico da regi o do Cerrado. O trabalho foi realizado no campoexperimental da Universidade Federal de Goiás, localizado no Centro de Ciências Agrárias e Biológicas no Campus de Jataí – Estado de Goiás. O delineamento experimental adotado foi o de blocos ao acaso, com cinco repeti es. Foram utilizadas as espécies: Aveia pretacomum, Aveia preta IAPAR61, Braquiaria brizantha, Braquiaria decumbens, Capim-pé-degalinha, Milheto BN2, Milheto BRS 1501, Milheto MT, Crotalaria spectabilis, Crotalaria juncea, Guandu normal, Guandu super N, Girassol selvagem, Kenaf 1, Kenaf 2, Nabo forrageiro e Niger. O milheto BRS 1501 obteve a maior fitomassa entre as gramíneas, a C. spectabilis, entre as leguminosas e o nabo forrageiro, entre as outras famílias. O milheto BRS1501, C. spectabilis e nabo forrageiro também obtiveram o maior acúmulo de N na parte aérea. As espécies nabo forrageiro, kenaf 1 e milheto BRS 1501 s o as mais recomendadas como cobertura do solo para a regi o do cerrado goiano. Plant species that have high biomass production are of fundamentalimportance to the sustainable development of no-tillage systems in the cerrado region. This experiment had the objective of evaluating the biomass production and nitrogen accumulation in 17 plant species in a Oxisol of the cerrado region. This experiment was conducted in an experimental field of the Federal University of Goiás, located in the Agricultural and Biological Cientific Center of Jataí - State of Goiás. The experimental layout was a randomized block with 5 replicates. The following species were used: two species of Avena strigosa, Brachiaria brizantha, Brachiaria decumbens, Eleusine indica, three species of Pennicetum americanum, Crotalaria spectabilis, Crotalaria juncea, two species of Cajanus cajan,Helianthus sp (savage), two species of Hibiscus cannabinus, Raphanus sativus and Guizotia abyssinica. Among the grasses, BRS 1501 millet presented the highest biomass production; among the legumes C. spectablis showed the same behavior; and Raphanus sativus for theother families. These three species also presented higher values for N accumulation in the shoots. The species Raphanus sativus, Hibiscus cannabinus 1 and BRS 1501 millet are the ones recommended for cover crops in cerrado soils in the Goiás cerrado region.
Altera es nas fra es do carbono em um neossolo quartzarênico submetido a diferentes sistemas de uso do solo = Alterations in carbon fractions in a Typic Quartzipisamment under different systems of soil management
Edicarlos Damacena de Souza,Marco Aurélio Carbone Carneiro,Helder Barbosa Paulino,Carlos Alberto Silva
Acta Scientiarum : Agronomy , 2006,
Abstract: O conhecimento das fra es do carbono organico do solo pode contribuir para inferir sobre o melhor manejo utilizado nos solos. Neste estudo, objetivou-se avaliar o efeito de diferentes usos do solo nos compartimentos do carbono no solo como o carbono organicototal, carbono da fra o leve e pesada, carbono da biomassa e respira o microbiana do solo em um Neossolo Quartzarênico sob cerrado. O carbono organico total n o foi influenciado pelo manejo do solo. Já o carbono da fra o leve, carbono da biomassa microbiana e atividade microbiana foram diferentes entre os usos do solo. O carbono da fra o pesada mostrou-se muito estável no solo em todas as áreas avaliadas. O carbono da fra o leve e o carbono da biomassa microbiana podem ser utilizados como indicadores de qualidade do solo em curto prazo. A área, sob cerrado nativo, apresentou os maiores teores de carbono da fra o leve e, consequentemente, maior atividade microbiana. The knowledge of soil organic carbon fractions can contribute to infer about the best soil management. This paper aimed to measure the effect of different soil managements on total organic carbon, light and heavy carbon fractions, microbial biomass and respiration in a Typic Quartzipisamment under Brazilian cerrados. Organic carbon was not influenced by soil management. However, the light fraction ofcarbon, microbial biomass and activity was different among crop systems. The heavy carbon fraction was very stable under the soil and crop systems used. Carbon of the light fraction and of microbial biomass can be used as indicators of soil quality in short term. Area under native cerrado showed higher carbon content in the low fraction and consequently higher microbial activity.
Gesso agrícola e rendimento de gr?os de soja na regi?o do sudoeste de Goiás
Neis, Lucimeire;Paulino, Helder Barbosa;Souza, Edicarlos Damacena de;Reis, Edésio Fialho dos;Pinto, Flávio Araújo;
Revista Brasileira de Ciência do Solo , 2010, DOI: 10.1590/S0100-06832010000200014
Abstract: the tilling of areas in no-tillage to several years and the use of gypsum practices are observed among the farmers in southwestern goiás. this study was carried out to evaluate the effect of gypsum rates (0, 1, 2, 4 e 6 mg ha-1) on some chemical attributes in the soil's depth and in soybean yield in area under long-term no-till, with and without tillage. a complete randomized block scheme with a split-split-plot design with four replicates was used. the area has been conducted under no-till for several years in a dystrophic clay red-yellow latosol, in southwestern goias, where calcium, magnesium, potassium and sulphate contents and effective cation exchange capacity were determined in the 0-5, 5-10, 10-20 and 20-40 cm layers. a higher concentration of cations and sulphate was observed in the 0-5 cm layer under no-tillage without revolving while the no-tillage with revolving, the sulphate concentrated in the 20- 40 cm layer. although soybean yields were higher under no-till without revolving they were not affected by gypsum rates.
Desenvolvimento e produ??o de bananeiras Thap Maeo e Prata-An? com diferentes níveis de aduba??o nitrogenada e potássica
Ratke, Rafael Felippe;Santos, Silvia Corrêa;Pereira, Hamilton Seron;Souza, Edicarlos Damacena de;Carneiro, Marco Aurélio Carbone;
Revista Brasileira de Fruticultura , 2012, DOI: 10.1590/S0100-29452012000100037
Abstract: the objective of this research is to characterize the development and yield of banana trees in the southwest region of goiás and to adjust different combination levels of n and k. the experiment was conducted in dystrophic red oxisol, in the district of rio verde, goiás, and consisted on five doses of increasing rates of n and k (n0/k0 - 0 kg ha-1 year-1 of n and 0 kg ha-1 year-1 of k; n1/k1 - 150 kg ha-1 year-1 of n and 200 kg ha-1 year-1 of k ; n2/k2 - 300 kg ha-1 year-1 of n and 450 kg ha-1 year-1 of k; n3/k3 - 450 kg ha-1 year-1 of n and 600 kg ha-1 year-1 of k; n4/k4 - 600 kg ha-1 year-1 of n and 800 kg ha-1 year-1 of k), applied to two cultivars of bananas, thap maeo and prata-an?. the evaluations conducted in the plants were: plant height, pseudo stem diameter and leaf number at 150 days after planting (dat) and at flowering. the plants were assessed at the flowering and at the harvest observing the following yield components: the time elapsed between planting and flowering, leaf number at harvest, number of bunch per cluster and number of fruits in the second bunch, the length of the stem and the fruits in the second bunch, the diameter of the stem and fruits in the second bunch and the weight of the bunch, the stem and the fruits in the second bunch. the banana plants were sampled at flowering for analyzing the nutrient content. with the data of yield components were calculated durability index of the leaf and absolute rate of banana growth. the results were submitted to anova and regression, and the mean comparison by the tukey test. the attributes of development, production and leaf levels of nutrients in thap maeo and prata-an? were influenced by different rates of combined n and k. the smallest interval between flowering days was found with rates of 300 kg ha-1 of n and 450 kg ha-1 of k in thap maeo. there was no better combination of n and k parameters for the development, production and leaf levels of nutrients in prata-an?.
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