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| Registros recuperados: 215 | |
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| Wild,Anna-Katharina; Marx,Michael Thomas; Eisenbeis,Gerhard. |
| Micro, macro and mesofauna in the soil often respond to fluctuating environmental conditions, resulting in changes of abundance and community structure. Effects of changing soil parameters are normally determined with samples taken in the field and brought to the laboratory, i.e. where natural environmental conditions may not apply. We devised a method (STAFD - soil tubes for artificial flood and drought), which simulates the hydrological state of soil in situ using implanted cores. Control tubes were compared with treatment tubes in which floods of 15, 30, 60 and 90 days, and droughts of 60, 90 and 120 days were simulated in the field. Flooding and drought were found to reduce number of individuals in all soil faunal groups, but the response to drought... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climate change; Drought; Flooding; Soil invertebrates; Soil tubes; STAFD method. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800007 |
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| BRAGA, P.; CRUSIOL, L. G. T.; CARANHATO, A. L. H.; FUHRMANN, M. B.; KOLTUN, A.; NANNI, M. R.; NEPOMUCENO, A. L.; NEUMAIER, N.; FARIAS, J. R. B.; GONÇALVES, L. S. A.; MERTZ-HENNING, L. M.. |
| 10º CBMP, 2019. |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Fenótipo; Absorção de Água; Soja; Sensoriamento Remoto; Soybeans; Available water capacity; Drought; Phenotype; Remote sensing. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1119040 |
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| CHARMETANT, P.; PERTHUIS, B.; BEDIMO, J. M.; MANGA, A. M.; GUERRA, A. F.; BARTHOLO, G. F.; ROCHA, O. C.; LEROY, T.; PEREIRA, L. F. P.; RODRIGUES, G. C.; ANDRADE, A. C.; MARRACCINI, P.. |
| O objetivo desse trabalho foi caracterizar recursos genéticos de Coffea arabica - acessos selvagens e cultivares - oriundo da África visando sua utilização no melhoramento. |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Adaptação; Recursos genéticos; Aclimatação; Seca; Coffea Arábica.; Drought; Genetic resources.. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1029899 |
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| Altinkut,A.; Kazan,K.; Gozukirmizi,N.. |
| The amplified fragment length polymorphism (AFLP) assay is an efficient method for the identification of molecular markers, useful in the improvement of numerous crop species. Bulked Segregant Analysis (BSA) was used to identify AFLP markers associated with water-stress tolerance in barley, as this would permit rapid selection of water-stress tolerant genotypes in breeding programs. AFLP markers linked to water-stress tolerance was identified in two DNA pools (tolerant and sensitive), which were established using selected F2 individuals resulting from a cross between water-stress-tolerant and sensitive barley parental genotypes, based on their paraquat (PQ) tolerance, leaf size, and relative water content (RWC). All these three traits were previously shown... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bulked segregant analysis; Drought; Hordeum vulgare; AFLP; Paraquat. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000100013 |
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| CAVALCANTI, N. de B.; OLIVEIRA, C. A. V.; BRITO, L. T. de L.; REIS, E. M.. |
| A melhoria das condicoes de vida dos pequenos produtores rurais da regiao semi-arida do Nordeste brasileiro, depende dos fatores socioeconomicos, geoambientais e do suporte tecnologico a disposicao desses agricultores. Alguns trabalhos mostram que a melhoria das condicoes de renda e, consequentemente das condicoes de vida dos pequenos agricultores, depende de um aumento da produtividade dos fatores de producao escassos. Esta transformacao realiza-se, em grande parte, pelo progresso tecnologico. A adocao de tecnologias de producao mais eficientes aumenta a rentabilidade de empresa agricola, que pelo aumento da produtividade fisica das culturas ou criacoes existentes ou a serem produzidas, quer pela reducao dos custos de producao, tecnicas de conservacao de... |
| Tipo: Parte de livro |
Palavras-chave: Convivencia; Nao adocao; Agricultor baixa renda; Nordeste; Regiao semi-arida; Non adoption; Farm policy; Small farmers; Northeast; Semi-arid region; Política Agrícola; Seca; Tecnologia; Drought; Brazil; Technology. |
| Ano: 1995 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/131735 |
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| MARINHO, J. P.; KANAMORI, N.; FERREIRA, L. C.; CARVALHO, J. F. C.; FREITAS, R. A.; FUGANTI-PAGLIARINI, R.; MARIN, S. R. R.; RODRIGUES, F. A; HENNING, L. M. M.; FARIAS, J. R. B.; NEUMAIER, N.; MARCELINO-GUIMARÃES, F. C.; YOSHIDA, T.; FUJITA, Y.; YAMAGUCHI-SHINOZAKI, K.; NAKASHIMA, K.; NEPOMUCENO, A. L.. |
| Tipo: Parte de livro |
Palavras-chave: Soja; Climatologia; Deficiência hídrica; Soybeans; Drought; Dry environmental conditions; Water deprivation. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1018548 |
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| VINECKY, F.; ALVES, G. S. C.; VIEIRA, N. G.; FREIRE, L. P.; HEIMBECK, I. G. R.; FERRÃO, R. G.; FONSECA, A. F. A. da; FERRAO, M. A. G.; SILVA, V. A.; MARRACCINI, P.; ANDRADE, A. C.. |
| A seca é uma das principais limitações climáticas à produção do cafeeiro. A importância dessa limitação deve aumentar, em função das mudanças reconhecidas no clima global e, também, porque a cafeicultura vem sendo expandida para regiões marginais onde a baixa pluviosidade e temperaturas desfavoráveis se constituem grandes limitações à produção do café. A seca induz diversas respostas fisiológicas e moleculares nas plantas, incluindo alterações da expressão gênica, visando atingir ajuste osmótico, a indução de reparadores de sistemas moleculares e a expressão de diversas proteínas protetoras. Existem diversas formas de se avaliar a expressão gênica em plantas submetidas ao estresse hídrico. Uma técnica amplamente utilizada nos últimos anos, para a análise... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Expressão gênica; Gene candidato; Candidate genes.; Coffea Canephora; Seca.; Drought; Gene expression.. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/903864 |
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| Armstrong, Dan P.; Ho, Christie K.M.; Doyle, Peter T.; Malcolm, Bill; Gibb, I.; Brown, Stuart. |
| The dairy industry in northern Victoria faced dramatic changes between 2001/02 and 2002/03. Drought resulted in a substantial decrease in availability, and subsequent increase in price, of irrigation water and supplementary feed. Most farms recorded substantial net cash flow deficits. Prior to 2002/03, a project had been established using case studies and a spreadsheet model to examine potential futures for different farm types. This approach was successfully adapted to examine drought impacts and recovery options under the vastly different prevailing circumstances. Several factors appear to have contributed to the adaptability of the approach, as follows: • The approach considered many aspects of farm management systems, but was simple enough to allow... |
| Tipo: Article |
Palavras-chave: Dairy farming systems; Drought; Farm management economics; Farm Management. |
| Ano: 2005 |
URL: http://purl.umn.edu/123136 |
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| Sookhtanlo, Mojtaba; Sarani, Valiollah. |
| The main purpose of this study was to analyze the Factors Affecting on risk management in wheat production among farmers of Razavieh region (Khorasan-E-Razavi province, Iran). Statistical population of the study was 1520 farmers that they had water cultivation. By using of stratified proportional random sampling 156 respondents were selected from 8 villages. For the calculation of the risk-aversion coefficient degree among farmers, the Safety First Rule model was used. The findings revealed that the dominant respondents (65%) were risk-averse. The results of exploratory factorial analysis showed that five factors determined about 74.267 % from total variance for wheat farmers' risk management that consist of: economy & marketing management factor,... |
| Tipo: Article |
Palavras-chave: Wheat farmers; Risk-aversion; Risk management; Drought; Agricultural extension; Farm Management; Risk and Uncertainty; GA; IN. |
| Ano: 2011 |
URL: http://purl.umn.edu/120238 |
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| ASHKAVAND,PEYMAN; ZARAFSHAR,MEHRDAD; TABARI,MASOUD; MIRZAIE,JAVAD; NIKPOUR,AMIRREZA; BORDBAR,SEYED KAZEM; STRUVE,DANIEL; STRIKER,GUSTAVO GABRIEL. |
| We studied the physiological responses of Prunus mahaleb (Mahaleb) seedlings to drought stress when previously irrigated (or not) with different concentrations of SiO2 nanoparticles (SNPs). SNPs were applied at four concentrations (0, 10, 50 and 100 mg L-1) for 45 days, and then seedlings were subjected to three watering treatments including low (300 mL water every 3 d), moderate (150 mL water every 3 d) and severe drought stress (no irrigation) for 19 days. Results showed that gas exchange photosynthesis, stomatal conductance, and transpiration rate were significantly less impacted by severe drought stress when seedlings were pretreated with SNPs at high concentrations. Beneficial effects of SNPs pretreatment were evident in the nutritional status of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pre-treatment; Silica nanoparticles; Drought; Stress alleviation; Photosynthesis.. |
| Ano: 2018 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722018000200007 |
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| Kuhn, Arnim; Institute for Food and Resource Economics, University of Bonn; arnim.kuhn@ilr.uni-bonn.de; Naumann, Christiane; Department of Cultural and Social Anthropology, University of Cologne; christiane.naumann@uni-koeln.de; Rasch, Sebastian; Institute for Food and Resource Economics, University of Bonn; sebastian.rasch@ilr.uni-bonn.de; Sandhage-Hofmann, Alexandra; Soil Science and Soil Ecology Group, Institute of Crop Science and Resource Conservation, University of Bonn; sandhage@uni-bonn.de; Amelung, Wulf; Soil Science and Soil Ecology Group, Institute of Crop Science and Resource Conservation, University of Bonn; wulf.amelung@uni-bonn.de; Jordaan, Jorrie; Department of Plant Production, Soil Science and Agricultural Engineering, University of Limpopo; jorrie.jj@gmail.com; Du Preez, Chris C.; Department of Soil, Crop and Climate Sciences, University of the Free State; dpreezcc@ufs.ac.za; Bollig, Michael; Department of Cultural and Social Anthropology, University of Cologne; M.Bollig@verw.uni-koeln.de. |
| In the past decades, social-ecological systems (SESs) worldwide have undergone dramatic transformations with often detrimental consequences for livelihoods. Although resilience thinking offers promising conceptual frameworks to understand SES transformations, empirical resilience assessments of real-world SESs are still rare because SES complexity requires integrating knowledge, theories, and approaches from different disciplines. Taking up this challenge, we empirically assess the resilience of a South African pastoral SES to drought using various methods from natural and social sciences. In the ecological subsystem, we analyze rangelands’ ability to buffer drought effects on forage provision, using soil and vegetation indicators. In the social... |
| Tipo: NON-REFEREED |
Palavras-chave: Drought; Empirical resilience assessment; Globalization; Institutions; Monetary resources; Pastoralism; Rangelands; Social-ecological system. |
| Ano: 2016 |
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| Registros recuperados: 215 | |
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