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| Registros recuperados: 138 | |
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| IQBAL,M.A.; ABDUL,H.; MUZAMMIL,H.S.; IMTIAZ,H.; TANVEER,A.; SAIRA,I.; ANSER,A.. |
| ABSTRACT: Food security assurance to meet the demands of increased population growth requires a proportional increase in milk and meat production which, in turn, depends on animal nutrition. Assessing foliar application of micronutrients for production of substantive quantities of good quality forage must be a goal of modern, profit-oriented, sustainable agriculture and plants with better competitive ability as compared to weeds. This meta-analysis made a quantitative and qualitative analysis of the impact of foliar feeding of micronutrients (iron, zinc, copper, sulfur and boron) on forage crops under varying pedo-climatic conditions. Weighted and unweighted meta-analyses were performed on 139 studies to evaluate 19 independent variables (9 qualitative, 5... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Economic returns; Plant nutrition; Sprays; Weighted meta-analysis; Zinc. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100245 |
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| Dezordi,Luciel Rauni; Aquino,Leonardo Angelo de; Novais,Roberto Ferreira; Aquino,Priscila Maria de; Santos,Luiz Paulo Dornelas dos. |
| ABSTRACT The literature on fertilization for carrot growing usually recommends nutrient application rates for yield expectations lower than the yields currently obtained. Moreover, the recommendation only considers the results of soil chemical analysis and does not include effects such as crop residues or variations in yield levels. The aim of this study was to propose a fertilizer recommendation system for carrot cultivation (FERTICALC Carrot) which includes consideration of the nutrient supply by crop residues, variation in intended yield, soil chemical properties, and the growing season (winter or summer). To obtain the data necessary for modeling nutritional requirements, 210 carrot production stands were sampled in the region of Alto Paranaíba, State... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrient balance; Daucus carota L.; Plant nutrition. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601714 |
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| Amado,Telmo Jorge Carneiro; Hahn Villalba,Enrique Oswin; Bortolotto,Rafael Pivotto; Santi,Antônio Luis; Benítez León,Enrique Asterio; Menefee,Dorothy; Kunz,Junior. |
| In order to select soil management practices that increase the nitrogen-use efficiency (NUE) in agro-ecosystems, the different indices of agronomic fertilizer efficiency must be evaluated under varied weather conditions. This study assessed the NUE indices in no-till corn in southern Paraguay. Nitrogen fertilizer rates from 0 to 180 kg ha-1 were applied in a single application at corn sowing and the crop response investigated in two growing seasons (2010 and 2011). The experimental design was a randomized block with three replications. Based on the data of grain yield, dry matter, and N uptake, the following fertilizer indices were assessed: agronomic N-use efficiency (ANE), apparent N recovery efficiency (NRE), N physiological efficiency (NPE), partial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Plant nutrition; No-tillage; Soil fertility. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000600020 |
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| Silva,Rita de Cássia Ferreira da; Silva,Fernando Bruno Vieira da; Biondi,Caroline Miranda; Nascimento,Clístenes Williams Araújo do; Oliveira,Emídio Cantídio Almeida de. |
| ABSTRACT Micronutrient research for sugarcane in northeastern Brazil is scarce and most works on this issue date back to the 70’s and 80’s. The objectives of this study were to assess the available and reserve pools of Fe, Mn, Cu, and Zn in soils cultivated with sugarcane under three geological contexts in northeastern Brazil as well as to diagnose the micronutrient nutritional status of sugarcane grown on these areas in order to identify pedogeological conditions in which micronutrient deficiencies are likely. Results showed that the soils cultivated with sugarcane in the states of Paraíba and Pernambuco posed available and reserve contents of micronutrients related to the parent materials and soil textural classes. The reserve contents of Fe, Mn, Zn, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil fertility; Trace elements; Plant nutrition; Critical levels. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100522 |
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| Veras,Márcia de Sousa; Ramos,Maria Lucrécia Gerosa; Oliveira,Daiana Nara Santos; Figueiredo,Cícero Célio de; Carvalho,Arminda Moreira de; Pulrolnik,Karina; Souza,Kleberson Worslley de. |
| ABSTRACT The use of cover crops has recently increased and represents an essential practice for the sustainability of no-tillage systems in the Cerrado region. However, there is little information on the effects of nitrogen fertilization and cover crop use on nitrogen soil fractions. This study assessed changes in the N forms in soil cropped to cover crops prior to corn growing. The experiment consisted of a randomized complete block design arranged in split-plots with three replications. Cover crops were tested in the plots, and the N topdressing fertilization was assessed in the subplots. The following cover species were planted in succession to corn for eight years: Urochloa ruziziensis, Canavalia brasiliensis M. ex Benth, Cajanus cajan (L.) Millsp, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Plant nutrition; Fertilization and nutrition of annual crops. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100508 |
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| Pias,Osmar Henrique de Castro; Tiecher,Tales; Cherubin,Maurício Roberto; Mazurana,Michael; Bayer,Cimélio. |
| ABSTRACT Sulfur (S) fertilization recommendations for grain crops in Brazil were formerly established from studies on crops with a low yield potential grown on soils under conventional tillage (CT). However, the subsequent adoption of no-tillage (NT) altered S dynamics in the soil, making it necessary to carefully evaluate the applicability of these S fertilizer recommendations. In addition, the emergence of modern high-yield-potential genotypes, the successive application of concentrated low-sulfur fertilizers, and reduction in S atmospheric deposition have raised the likelihood of positive responses of crops to S fertilization. Available literature reports contrasting crop responses to S fertilization in Brazilian soils, ranging from substantial gains to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sulfur fertilizer rate; Available SO42--S content; Climate zone; Plant nutrition; Sustainable fertilizer management. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100506 |
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| Heinrichs,Reges; Grano,Fernanda Grecco; Bueno,Leda Gobbo de Freitas; Soares Filho,Cecílio Viega; Fagundes,Jailson Lara; Rebonatti,Melina Daniel; Oliveira,Katia de. |
| Among the production factors, adequate fertilization is an important tool to raise the productivity of pastoral systems and consequently increase the share of Brazil in the supply chain of primary agricultural products at the global level. The objective of this study was to evaluate the interaction of nitrogen and sulfur fertilization in BRACHIARIA DECUMBENS: Stapf. The experiment in pots with Dystrophic Oxisol was evaluated in a completely randomized design with four replications in a 5 x 3 factorial arrangement, involving five N doses (0, 100, 200, 400, and 800 mg dm-3) in the form of ammonium nitrate and three S doses (0, 20 and 80 mg dm-3) in the form of calcium sulfate, with a total of 15 treatments. In the treatments with low S dose, calcium was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilization; Brachiaria decumbens; Plant nutrition; Forage plants. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400017 |
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| Oliveira,Thomas Carlos; Fontes,Renildes Lúcio Ferreira; Rezende,Sebastião Tavares de; Víctor Hugo,Alvarez V.. |
| Nickel is a micronutrient involved in nitrogen metabolism and a constituent of the urease molecule. Plant growth and urease activity were evaluated in lettuce (Lactuca sativa L.) grown in soil-filled pots in a 2 x 8 factorial design with two nitrogen (N) sources and eight Ni rates, with five replications. Nitrogen was applied at 200 mg dm-3 (half the dose incorporated into the soil at seedling transplanting and half top-dressed later) using the sources NH4NO3 (AN) and CO(NH2)2 (Ur). The Ni treatments (0, 2, 4, 8, 12, 16, 24 and 32 mg dm-3) were applied as NiCl2. The shoot dry-matter yield, leaf urease activity, Ni levels in the lettuce leaves and Ni levels extracted from soil with Mehlich-3 (M-3) and DTPA were determined. In the plants supplied with AN,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonium nitrate; Urea; Plant nutrition; Lactuca sativa L. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300016 |
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| Matos,Gilson Sergio Bastos de; Fernandes,Antonio Rodrigues; Wadt,Paulo Guilherme Salvador; Pina,Antônio José de Abreu; Franzini,Vinícius Ide; Ramos,Helen Monique Nascimento. |
| ABSTRACT The oil palm crop has expanded significantly in the state of Pará, which has not been followed in a proportional manner by studies aiming at increasing yield through plant nutrition. The objective of this study was to evaluate general and specific norms of the Diagnosis and Recommendation Integrated System (DRIS) for genetic materials of oil palm (African and interspecific hybrid) at two ages (young and adult plants) and evaluate possible deficiencies in fertilization and soil correction practices. The DRIS norms were composed of means, standard deviations, and coefficients of variation of bivariate, specific, and general relationships among nutrients of 144 leaf samples. The DRIS norms specific for genetic material did not differ from the general... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elaeis guineensis Jacq.; E. oleifera × E. guineensis; Eastern Amazonia; Plant nutrition. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100510 |
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| Gandini,Andrezza Mara Martins; Grazziotti,Paulo Henrique; Rossi,Márcio José; Grazziotti,Danielle Cristina Fonseca Santos; Gandini,Elizzandra Marta Martins; Silva,Enilson de Barros; Ragonezi,Carla. |
| ABSTRACT Ectomycorrhizal fungi (EMF) may improve the adaptation of eucalypts saplings to field conditions and allow more efficient fertilizer use. The effectiveness of EMF inoculum application in promoting fungal colonization, plant growth, nutrient uptake, and the quality of rooted cuttings was evaluated forEucalyptus urophylla under commercial nursery conditions. For inoculated treatments, fertilization of the sapling substrate was reduced by 50 %. The experiment was carried out in a completely randomized design in a 4 × 4 factorial arrangement, wherein the factors were inoculum application rates of 0 (control), 5, 10, and 15 gel beads of calcium alginate containing the vegetative mycelium of Amanita muscaria, Elaphomyces antracinus, Pisolithus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Symbiosis; Plant nutrition; Cuttings production; Phosphorus; Nitrogen; Potassium. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601554 |
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| Wadt,Paulo Guilherme Salvador. |
| Farm planning requires an assessment of the soil class. Research suggest that the Diagnosis and Recommendation Integrated System (DRIS) has the capacity to evaluate the nutritional status of coffee plantations, regardless of environmental conditions. Additionally, the use of DRIS could reduce the costs for farm planning. This study evaluated the relationship between the soil class and nutritional status of coffee plants (Coffea canephora Pierre) using the Critical Level (CL) and DRIS methods, based on two multivariate statistical methods (discriminant and multidimensional scaling analyses). During three consecutive years, yield and foliar concentration of nutrients (N, P, K, Ca, Mg, S, B, Zn, Mn, Fe and Cu) were obtained from coffee plantations cultivated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DRIS; Critical level; Plant nutrition; Nutritional diagnosis; Soil classification; Oxisol; Coffea canephora. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000200008 |
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| Monnerat,Cecília Silva; Freitas,Marta Simone Mendonça; Vieira,Ivo José Curcino; Martins,Marco Antônio; Carvalho,Almy Junior Cordeiro de; Santos,Paulo Cesar dos; Lima,Thaísa Capato. |
| ABSTRACT Catharanthus roseus (L) G. Don (Madagascar periwinkle) belongs to the Apocynaceace family and is widely spread throughout tropical and subtropical regions of the world. The plant produces several important alkaloids, such as ajmalicine and serpentine, which are used in the treatment of circulatory diseases. The potential of inoculation with arbuscular mycorrhizal fungi (AMF) and nitrogen fertilization to enhance the production of alkaloids was investigated in periwinkle. A greenhouse experiment was carried out to evaluate the effects of arbuscular mycorrhizal fungi and N fertilizer dosages on plant growth, production of ajmalicine, and nutrient content in roots. The concentration of ajmalicine was determined by reverse-phase high-performance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Periwinkle; Apocynaceae; Alkaloids; Plant nutrition. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100416 |
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| Santini,José M. K.; Buzetti,Salatiér; Teixeira Filho,Marcelo C. M.; Galindo,Fernando S.; Coaguila,Daniel N.; Boleta,Eduardo H. M.. |
| ABSTRACT In search of a more sustainable agriculture, the use of beneficial microorganisms has been highlighted, because they are low-cost and can reduce the use of fertilizers and increase grain yield. The present study aimed to evaluate the efficiency of A. brasilense inoculation and the best form and dose of inoculation in maize, measuring the impact on some physical characteristics and on its nutrition. The experiment was conducted in a greenhouse, in Ilha Solteira, SP, Brazil, in a completely randomized design, with four replicates and eight treatments: 1) control; 2) Seed 1x; 3) Seed 2x; 4) Soil 1x; 5) Soil 2x; 6) Leaf 1x; 7) Leaf 2x; 8) Seed 1x + Leaf 1x, respectively representing in each treatment the site and dose of application (1x, dose... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diazotrophic bacteria; Plant growth promoters; Plant nutrition; Zea mays L.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000600373 |
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| Freitas,Elis M. de; Giovanelli,Luan B.; Delazari,Fábio T.; Santos,Márcio L. dos; Pereira,Silvio B.; Silva,Derly J. H. da. |
| ABSTRACT Arugula is a vegetable that has gained more highlight in the consumption, being rich in potassium, sulfur, iron, omega-3 and vitamins A and C. Availability of water and nutrients are limiting factors for production of this crop. In this context, the objective of this study was to evaluate the production of arugula subjected to different irrigation depths and potassium fertilization. The experiment was conduct between August and September 2015. The experimental design was completely randomized in split-plot scheme. Irrigation depths L1, L2, L3 and L4 (25, 50, 75 and 100% of crop evapotranspiration, respectively) represented the plots and potassium doses K1 and K2 (200 and 400 kg ha-1, respectively) represented the subplots. Although the highest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eruca sativa L.; Drip tape; Plant nutrition. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300197 |
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| Souza,Francisco I. de; Grangeiro,Leilson C.; Souza,Valdívia de F. L. de; Gonçalvez,Francisco das C.; Oliveira,Fábio H. T. de; Jesus,Priscila M. M. de. |
| ABSTRACT The objective of this research was to evaluate the agronomic performance of Italian zucchini as a function of phosphate fertilization. The experiments were carried at the Rafael Fernandes Experimental Farm, Federal Rural University of the Semi-Arid Region, Mossoró, RN, Brazil, from August to November 2015 and from July to September 2016. The experimental design was randomized blocks in 2 x 5 factorial scheme, with four replicates. The treatments consisted of the combination of two cultivars (Caserta and Alícia) and five doses of phosphorus (0, 40, 78, 120 and 150 kg ha-1 of P2O5). Phosphorus doses associated with the maximum marketable yields estimated were smaller for Alícia than for Caserta in the period from August to November 2015. In the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucurbita pepo L.; Plant nutrition; Yield. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300206 |
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| Santos Júnior,Antônio C. dos; Carvalho,Marco A. C. de; Yamashita,Oscar M.; Tavanti,Tauan R.; Tavanti,Renan F. R.. |
| ABSTRACT The use of microorganisms in agriculture such as Azospirillum brasilense and the cultivation of cover crops in the off season, together with nitrogen fertilization, may be interesting alternatives to increase crop yield. The objective of this study was to evaluate the growth, production and nitrogen concentration of maize grown in succession to cover crops and their interactions with A. brasilense inoculation and topdressing mineral N fertilization. The experiment was conducted on Oxisol, in randomized block design in split-split-plot scheme with four repetitions. The plots consisted of four cover crops: jackbean (Canavalia ensiformis), dwarf pigeon pea (Cajanus cajan), crotalaria (Crotalaria spectabilis) and spontaneous vegetation. In the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Diazotrophic bacteria; Plant nutrition. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200966 |
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| Carneiro,Marcio A.; Lima,Augusto M. N.; Cavalcante,Ítalo H. L.; Cunha,Jailson C.; Rodrigues,Marcos S.; Lessa,Thiago B. da S.. |
| ABSTRACT Irrigated fruit crops have an important role in the economic and social aspects in the region of the Sub-middle São Francisco River Valley. Thus, the aim of this study was to evaluate soil salinity and the productive aspects of the mango crop, cv. Tommy Atkins, fertigated with doses of potassium chloride (KCl) and potassium sulfate (K2SO4) during two crop cycles (from January to March 2014 and from January to March 2015). The experiment was carried out in a strip-split-plot design and five potassium doses (50, 75, 100, 125 and 150% of the recommended dose) as plots and two potassium sources (KCl and K2SO4) as subplots, with four replicates. Soil electrical conductivity (EC), exchangeable sodium (Na+) and potassium (K+) contents and pH were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electrical conductivity; Plant nutrition; Mangifera indica L.; Semi-arid region. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500310 |
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| Almeida Neta,Maria N.; Mota,Wagner F. da; Pegoraro,Rodinei F.; Pacheco,Maricelia C.; Batista,Caik M.; Soares,Marcela de C.. |
| ABSTRACT High doses of nitrogen, phosphorus and potassium in irrigated systems may lead to an increase in the productivity of industrial tomatoes, but may also alter the final quality of the fruits. The objective of this was to evaluate the agronomic yield and post-harvest quality of industrial tomatoes, under NPK doses for climatic conditions of Northern Minas Gerais state, Brazil. The study was conducted in the city of Jaíba, MG, Brazil, in randomized block design with four repetitions in a 3 x 3 factorial scheme, consisting of three doses of N (90, 135 and 180 kg ha-1), of P (270, 405 and 540 kg ha-1) and of K (225, 337 and 450 kg ha-1), corresponding to 50, 75 and 100% of the fertilization recommendation; and three tomato hybrids: BRS Sena, Heinz 9553... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum lycopersicum; Plant nutrition; Low-growing tomato; Pulp yield. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000100059 |
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| Registros recuperados: 138 | |
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