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| Registros recuperados: 73 | |
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| Pinho,Ricardo Martins Araujo; Santos,Edson Mauro; Carvalho,Gleidson Giordano Pinto de; Silva,Ana Paula Gomes da; Silva,Thiago Carvalho da; Campos,Fleming Sena; Macedo,Carlos Henrique Oliveira. |
| The present study evaluated the microbial population, fermentation profile, losses and dry matter recovery, and chemical composition of silages of buffel grass at different cutting heights. To evaluate the microbial fermentation dynamics, the treatments resulted from a 4 × 5 factorial combination consisting of 4 cutting heights and 5 fermentation periods, in a completely randomized design with three replications. The fermentation was evaluated at the end of 1, 3, 7, 15 and 30 days. The other characteristics of silages with 30 days were evaluated following a completely randomized design with four treatments, consisting of 4 cutting heights (30, 40, 50 and 60 cm), and five replications. Fermentation period and cutting height effects and interaction between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cenchrus ciliaris; Enterobacteria; Lactic acid; Microbiology; Semiarid. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001200003 |
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| RIBEIRO,LEONARDO B.; SILVA,NAISANDRA B.; FREIRE,ELIZA M. X.. |
| This study assessed the reproductive and fat body cycles of Tropidurus hispidus (Spix, 1825) and T. semitaeniatus (Spix, 1825) in an area of caatinga in the Serido of Rio Grande do Norte, Brazil, from October 2006 to May 2008. In both species, the females were reproductively active from the middle of the dry season to the beginning of the rainy season. Female reproductive activity was influenced by precipitation, whereas males exhibited spermatozoa in their testes throughout the year, and their reproductive activity was not related to any of the climatic variables analyzed. Mean clutch size (± SD) was 8.1 ± 2.0 and 2.1 ± 0.6 eggs in T. hispidus and T. semitaeniatus, respectively, and was significantly related to female body size only in T. hispidus. The... |
| Tipo: Journal article |
Palavras-chave: Body size-fecundity; Clutch size; Minimum size at maturity; Reproduction; Semiarid. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000300005 |
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| Freitas,Nicácio de Oliveira; Yano-Melo,Adriana Mayumi; Silva,Fábio Sérgio Barbosa da; Melo,Natoniel Franklin de; Maia,Leonor Costa. |
| The São Francisco Submedium Valley is located at the Brazilian semiarid region and is an important center for irrigated fruit growing. This region is responsible for 97% of the national exportation of table grapes, including seedless grapes. Based on the fact that organic fertilization can improve soil quality, we compared the effects of conventional and organic soil management on microbial activity and mycorrhization of seedless grape crops. We measured glomerospores number, most probable number (MPN) of propagules, richness of arbuscular mycorrhizal fungi (AMF) species, AMF root colonization, EE-BRSP production, carbon microbial biomass (C-MB), microbial respiration, fluorescein diacetate hydrolytic activity (FDA) and metabolic coefficient (qCO2). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis vinifera L.; Arbuscular mycorrhizal fungi; Semiarid; Soil microbial activity; Sustainable agriculture. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200013 |
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| Frosi,Gabriella; Harand,Wolfgang; Oliveira,Marciel Teixeira de; Pereira,Silvia; Cabral,Simone Pereira; Montenegro,Abelardo Antônio de Assunção; Santos,Mauro Guida. |
| ABSTRACT The effects of water deficit on physiological and biochemical variables of young plants of two tropical woody species, Pachira aquatica and Sterculia foetida, and their recovery abilities were measured. Leaf water potential, gas exchange and selected carbon metabolism components were measured in a greenhouse experiment with control, moderate and severe water deficit treatments. Under severe drought stress, gas exchange and chlorophyll fluorescence decreased in both species compared to their respective controls. After rehydration, P. aquatica and S. foetida showed a partial and full recovery of the measured variables, respectively. In addition, a decrease and an increase in photosynthetic pigments were observed for P. aquatica and S. foetida,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll fluorescence; Climate changes; Gas exchange; Semiarid; Water deficit. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200153 |
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| Coutinho,Flavia Paiva; Cavalcanti,Maria Auxiliadora de Queiroz; Yano-Melo,Adriana Mayumi. |
| Rhizosphere soil samples were collected in a semiarid area, in the region of the São Francisco River valley, Petrolina, Pernambuco state, Brazil, to study the diversity of filamentous fungi in a soil cultivated with melon (Cucumis melo L. cv. Gold Mine) and receiving different organic amendments: Treatment 1 (control, without organic compost); T2 (77% coconut fiber, 20% goat manure and 3% K2SO4); T3 (10% Ricinus communis leaves and stems, 50% Pennisetum purpureum leaves and 40% goat manure); T4 (77% coconut fiber, 20% goat manure and 3% termophosphate); T5 (47% Pennisetum purpureum leaves, 50% goat manure and 3% K2SO4); and T6 (57% Pennisetum purpureum leaves, 40% goat manure and 3% termophosphate). Fungal isolation was carried out by the serial dilution... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Semiarid; São Francisco River valley; Soil amendments; Microorganism. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100032 |
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| Leite, João Ricardo Avelar; Sales, Eleuza Clarete Junqueira de; Monção, Flávio Pinto; Guimarães, Adriano de Souza; Rigueira, João Paulo Sampaio; Gomes, Virgílio Mesquita. |
| This study aimed to evaluate the structural, productive and nutritional characteristics of cactus pear (Nopalea cochenillifera Salm Dyck. cv. Miúda/Doce) under five nitrogen doses and two planting orientations. A randomized block design in a 5 x 2 factorial scheme was used in the scheme: five nitrogen doses (0, 150, 300, 450 and 600 kg of N ha-1), and two planting orientations (North/South and East/West), with three replicates. Except for the thickness of the secondary (p = 0.04) and tertiary cladodes (p = 0.02), the morphometric characteristics of the cactus pear were not influenced by the nitrogen doses (p > 0.05). The mean height was 120 cm, the areas of the primary, secondary and tertiary cladodium were 160.9; 208 and 158.4 cm², respectively. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias; Zootecnia; Forragicultura e Pastagens biomass; Management; Morphometry; Semiarid; Viability.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/38325 |
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| FREIRE,JOELMA DE L.; SANTOS,MÉRCIA VIRGINIA F. DOS; DUBEUX JÚNIOR,JOSÉ CARLOS B.; BEZERRA NETO,EGÍDIO; LIRA,MÁRIO DE A.; CUNHA,MÁRCIO V. DA; SANTOS,DJALMA C. DOS; AMORIM,SILVANIA O. DE; MELLO,ALEXANDRE CARNEIRO L. DE. |
| Abstract Soil and water salinity are considered the main limiting factors of plant production. This work aimed to evaluate the influences of irrigation frequency and soil salinity on the development of cactus pear cv. Miúda (Nopalea cochenillifera Salm Dyck). The experiment was conducted in factorial arrangement of four salinity levels: 0.3 (control), 0.5 (low), 1.5 (medium) and 3.6 (high salinity) (ds m-1), associated with four irrigation frequencies (each 7, 14, 21 and 28 days) and two soil textures (sandy and sandy loam) in a randomized block design with four replicates. One cladode was planted in each polyethylene pot containing 10 kg of soil. The soil texture influenced some of the morphological characteristics of the cactus pear, so that plants grown... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cladodes; Forage; Salt stress; Semiarid. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703893 |
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| ALVALÁ,REGINA C.S.; CUNHA,ANA PAULA M.A.; BRITO,SHEILA S.B.; SELUCHI,MARCELO E.; MARENGO,JOSÉ A.; MORAES,OSVALDO L.L.; CARVALHO,MAGOG A.. |
| ABSTRACT Drought is a natural and recurrent phenomenon. It is considered ‘a natural disaster’ whenever it occurs in an intensive manner in highly populated regions, resulting in significant damage (material and human) and loss (socioeconomic). This paper presents the efforts developed to monitor the impact of drought in the semiarid region of Northeast Brazil. In this scope, information from different sources is compiled to support the evaluation and identification of impacted municipalities, with the main objective of supporting emergency actions to mitigate their impact. In the semiarid region of Brazil there are frequent occurrences of dry periods during the rainy season, which, depending on the intensity and duration, can cause significant damage to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture; Drought impacts; Drought monitoring; Semiarid; Dry farming; Northeast Brazil. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000200502 |
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| Ernesto,Matilde Vasconcelos; Liberal,Carolina Nunes; Ferreira,Aila Soares; Alves,Ana Claudia Firmino; Zeppelini,Douglas; Martins,Celso Feitosa; Pereira-Colavite,Alessandre; Creão-Duarte,Antônio José; Vasconcellos,Alexandre. |
| Abstract: In detritus-based trophic systems, springtails, dung beetles, saprophagous calyptrate flies and termites consume and fragment organic matter and control populations of decomposer microorganisms, exerting a strong influence on energy and nutrient fluxes. A faunal inventory of these four groups of hexapods was performed in Serra de Santa Catarina (SSC), an area of arboreal-shrub caatinga located in the state of Paraíba, with the purpose of characterizing the assemblages of these taxa, and highlighting their unique links to the local ecosystem. Samplings were performed in May, 2014, and April, 2015, both during the rainy season. Standard sampling protocols for biodiversity inventory of the various taxa were used, including both active and passive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coleoptera; Collembola; Diptera; Isoptera; Seasonally Dry Tropical Forests; Semiarid. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000200303 |
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| Registros recuperados: 73 | |
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