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| Registros recuperados: 51 | |
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| WANDSCHEER,ALANA C.D.; MARCHESAN,ENIO; TEDESCO,SOLANGE B.; FRESCURA,VIVIANE DAL-SOUTO; SOARES,CAMILLE F.; LONDERO,GUILHERME P.; TELÓ,GUSTAVO M.; HANSEL,DÂMARIS S.S.. |
| ABSTRACT Tricyclazole is currently one of the fungicides recommended for the treatment of diseases in irrigated rice. However, there is relatively little information on its cytotoxic and genotoxic potential. The objective of this study was to evaluate the cytotoxicity and genotoxicity of rice crop water after apllication of the tricyclazole fungicide through the Allium cepa L. test. The rice crop water samplings were collected before and 1, 15 and 30 days after application of the fungicide in rice plant shoots. The Allium cepa roots were placed in contact with the rice crop water to check for possible chromosomal abnormalities and mitotic index of the bioindicators meristematic cells. The data obtained by the Allium cepa test indicates that the application... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioindicator; Chromosomal abnormalities; Mitotic index; Pesticide; Irrigated rice. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301251 |
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| Hirzel,Juan; Pedreros,Alberto; Cordero,Karla. |
| Nutritional management in rice (Oryza sativa L.) crops is mainly associated with N fertilization, which is difficult to adjust in field conditions due to variations in soil type and climatic conditions. Between 28 000 and 46 000 ha per year is dedicated to rice production in Chile and profits depend on fertilization. A field experiment determine the effect of N rates and split N fertilization on grain yield and its components was carried out in two locations during two consecutive seasons (2007 to 2009), where five N rates and five split N fertilizations were evaluated. The locations were in Parral (36º2 S; 72º08 W, Vertisol) and San Carlos (36º19 S; 71º59 W, Inceptisol), with N rates of 80, 100, 120, 140, and 160 kg ha-1 applied in different... |
| Tipo: Journal article |
Palavras-chave: Irrigated rice; Nitrogen management; Rice productivity. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300015 |
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| Goulart,Eduardo da S; Braga Schuch,Luis O; Tunes,Lilian V. Madruga de; Vieira,Jucilayne F. |
| The practices and techniques used in irrigated rice to improve performance include optimal plant density and the best arrangement of the plants in an area. This study aims to evaluate the performance and plasticity in the yield and grain quality of three rice hybrids using different row spacing. The field experiments were conducted during the 2010/2011 season in rice crops in Capão do Leão, Viamão and Uruguaiana in the state of Rio Grande do Sul, Brazil. Three different sowing arrangements were evaluated, i.e., row spacing of 17 cm, 34 cm, and 17 cm alternated with 34 cm, which corresponded to densities of 40, 20 and 32 kg ha-1, respectively. The experimental design used was randomized blocks with subdivided plots replicated three times considering each... |
| Tipo: Journal article |
Palavras-chave: Irrigated rice; Oryza sativa L; Plant densities; Row spacing. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000100008 |
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| Faria,Lessandro Coll; Beskow,Samuel; Colombo,Alberto; Nörenberg,Bernardo Gomes; Rettore Neto,Osvaldo; Simões,Matheus Chagas. |
| ABSTRACT: Investigations demonstrate that the wind is the factor that causes the biggest negative influence on water application of sprinkler irrigation systems. Therefore, this paper aims to evaluate, in in-field conditions, the influence of wind on the water distribution uniformity of a mechanical lateral move sprinkler system used for irrigation in rice crop in the South of Rio Grande do Sul State, Brazil. The equipment is located at the Campo Experimental de Terras Baixas (ETB) of EMBRAPA/CPACT and operates with water emitters model I-Wob installed in drop tubes in a distance of 2.8m above the soil surface, having a uniform space of 2.3m between each other and pressure regulators of 68.9kPa. Sixteen in-field evaluations were done and they permitted to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated rice; Sprinkler; In-field tests; Irrigation uniformity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100083 |
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| MENGUE,VAGNER P.; FONTANA,DENISE C.. |
| ABSTRACT One of the most relevant activities of Brazilian economy is agriculture. Among the main crops in Brazil, rice is one of high relevance. The state of Rio Grande do Sul, in Southern Brazil, is responsible for 68.7% of domestic production (IBGE, 2013). The goal of this study was to develop a low-cost methodology with a regional scope to identify suitable areas for irrigated rice cropping in this state, using spectro-temporal behavior of vegetation index by means of MODIS images and HAND model. The rice-cropped area of this study was the southern half of the State. Using the HAND model, flood areas were mapped to identify irrigated rice cultivation. We used multi-temporal images of vegetation index from MODIS sensor, covering the period from August... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: HAND Model; EVI; MODIS; Irrigated rice; Mapping. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000200329 |
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| CAVALCANTE, E. da S.; PEREIRA, L. A. F.; FIGUEIREDO, F. J. C.; ALVES, R. N. B.. |
| Com o objetivo de selecionar cultivares de arroz irrigado para solos inundaveis no Territorio Federal do Amapá, a EMBRAPA, em 1982, através da Unidade de Execução de Pesquisa de Ambito Territorial - UEPAT Macapá, instalou, em área de várzea do Campo Experimental de Mazagão, um experimento de competição de cultivares. |
| Tipo: Folhetos |
Palavras-chave: Brasil; Amapá; Irrigated rice; Arroz Irrigado; Oryza Sativa; Brazil. |
| Ano: 1982 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/341743 |
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| Registros recuperados: 51 | |
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