Rice Fields
Mostrando 13-24 de 55 artigos, teses e dissertações.
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13. Yield-scaled global warming potential of two irrigation management systems in a highly productive rice system
ABSTRACT Water management impacts both methane (CH4) and nitrous oxide (N2O) emissions from rice paddy fields. Although controlled irrigation is one of the most important tools for reducing CH4emission in rice production systems it can also increase N2O emissions and reduce crop yields. Over three years, CH4 and N2O emissions were measured in a rice field in
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-02
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14. CSM-CERES-Rice model to determine management strategies for lowland rice production
The cropping system model, namely, the crop environment resource synthesis-rice (CSM-CERES-Rice) model, is a decision supporting tool for the design of crop management. This study aimed to determine management practices for increasing rice (Oryza sativa L.) production in Laos by using the CSM-CERES-Rice model. The model was evaluated with data sets from the
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-06
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15. Analyses of the 16S-23S intergenic region of the phytoplasma causing the sugarcane white leaf disease in Yunnan Province, China
Sugarcane white leaf (SCWL) is an important disease caused by a phytoplasma. In Baoshan, Yunnan, China, SCWL was firstly observed in 2012, and has extended its area of occurrence to 600 hm² . Up to 52% of the plants may become diseased in a field and even complete loss of cane yield may result in the heavily infected fields, posing a serious threat to Yunna
Trop. plant pathol.. Publicado em: 2014-04
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16. Effect of the insecticide Lambda-cyhalothrin on rice spider populations in southern Brazil
The adverse effect that insecticides have on spider populations is of major concern since these predators are a component in the biological control of rice insect pest populations. This study was designed to determine the effect of the pyrethroid insecticide, Lambda-cyhalothrin, on spider populations in rice fields. Treatments consisted of plots treated once
Zoologia (Curitiba). Publicado em: 13/12/2013
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17. Evaluation of As(III) and Sb(III) adsorption to paddy soils from irrigated rice fields in Bangladesh
O solo de várzea exerce um importante controle sobre os ciclos de arsênio e antimônio em ecossistemas de produção de arroz por meio de adsorção a partir da fase aquosa. Realizou-se um estudo de laboratório para avaliar a adsorção e o possível comportamento competitivo desses dois elementos contaminantes.
J. Braz. Chem. Soc.. Publicado em: 2013-04
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18. Distribuição espacial do percevejo-do-colmo (Tibraca limbativentris Stål) em arroz irrigado / Spatial distribution of the rice stink bug (Tibraca limbativentris Stål) in irrigated rice fields
A injúria imposta por Tibraca limbativentris Stål às plantas de arroz pode inviabilizar a produção e reduzir o rendimento de grãos. Conhecer o arranjo espacial desta espécie permite que amostragens rápidas e precisas identifiquem focos de infestação e se determine o momento ideal de tomada de decisão para o controle. O objetivo desse trabalho foi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/11/2012
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19. Biological control of golden apple snail, Pomacea canaliculata by Chinese soft-shelled turtle, Pelodiscus sinensis in the wild rice, Zizania latifolia field
The wild rice, Zizania latifolia Turcz, used to be one of the important aquatic vegetables cultivated in China. Recently, the golden apple snail - GAS (Pomacea canaliculata (Lamarck)) was found to be a major invasive pest attacking Z. latifolia. To control efficiently GAS, predation by the Chinese soft-shelled turtles (Pelodiscus sinensis) on GAS was evaluat
Scientia Agricola. Publicado em: 2012-04
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20. Biological control of rice brown spot with native isolates of three Trichoderma species
Brown spot caused by Bipolaris oryzae is an important rice disease in Southern coast of Caspian Sea, the major rice growing region in Iran. A total of 45 Trichoderma isolates were obtained from rice paddy fields in Golestan and Mazandaran provinces which belonged to Trichoderma harzianum, T. virens and T. atroviride species. Initially, they were screened aga
Brazilian Journal of Microbiology. Publicado em: 2012-03
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21. Influência da adubação nitrogenada e avaliação do estado de nitrogênio do arroz irrigado / Influence of nitrogen fertilization and assessment of nitrogen on irrigated rice fields
Experiments were carried out at the Experimental Station of the Federal University of Viçosa, Viçosa City, Minas Gerais State, Brazil, in 2008/09 crop, in order to investigate four tropical irrigated rice cultivars, subjected to six nitrogen doses for nitrogen use efficiency, nutrient uptake, grains productivity, and benefited grains produtivity. In additi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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22. AVALIAÇÃO DA EFICIÊNCIA OPERACIONAL NA OPERAÇÃO DE COLHEITA MECANIZADA EM LAVOURAS DE ARROZ IRRIGADO / EVALUATION OF OPERATING EFFICIENCIES IN HARVESTING RICE FIELDS
The objective of this thesis was evaluate the efficiencies of the harvesting operation in rice fields, located in the region of Depressão Central do Rio Grande do Sul. As specific objectives, this study sought to determine and evaluate the following efficiencies: field, time, field pattern and cutter bar; to verify if there is difference between the areas w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/03/2011
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23. Remediation of salt-affected soil by the addition of organic matter: an investigation into improving glutinous rice productivity
Soil salinity may limit plant growth and development, and cause yield loss in crop species. This study aimed at remediating saline soil using organic matter (OM) treatment, before the cultivation of RD6 rice (Oryza sativa L. spp. indica). Physiological and morphological characters of rice plants, as well as crop yield, were evaluated from salt-affected soil
Scientia Agricola. Publicado em: 2011-08
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24. Haplotype identification within Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) corn and rice strains from Colombia
The fall army worm Spodoptera frugiperda (Smith) is a migratory important pest of corn, sorghum, rice, grass and bermudagrass in North and South America. This species has diverged into two genetically differentiated but morphologically identical strains, "the rice" and "the corn". They have been analyzed by sequencing the genes cytochrome oxydase I, II and I
Neotropical Entomology. Publicado em: 2011-08