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| Registros recuperados: 13 | |
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| Bonvissuto,GL; Busso,CA. |
| The effects of various temperature combinations and water potentials were determined on the germination of Atriplex lampa Gill. ex Moquin, Larrea divaricata Cav., Leymus erianthus (Phil.) Dubcovsky, Stipa neaei Nees ex Steudel and Poa ligularis Nees ap. Steudel under controlled conditions. The tested hypothesis was that seed germination increases with increasing temperatures and water potentials in A. lampa, L. divaricata, L. erianthus, S. neaei and P. ligularis, and that time to reach 50% of total germination is greater at lower than higher water potentials. PEG 2000 was used to impose water stress conditions. In general, obtained results conducted to accept the posted hyphotesis. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water stress; Temperature; Germination index; Perennial grasses and shrubs; Arid Argentina. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572007000100011 |
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| Li,XL; Wang,YC; Busso,CA; Xiang,JS; Zhang,AM; Qu,YW; Liu,Y. |
| Long-term continuous cropping of cotton had led to substantial agricultural losses. However, continuous cotton cropping could maintain high crop yields for many years in some areas. The composition and structure of soil nematode communities were investigated to explore the effect of continuous cropping and soil depths on these communities. Soil samples were collected at two soil depths (0-20 cm and 20-40 cm) from cotton fields with a history of 5, 10, 15 or 20 years of continuous cotton cropping in the Karamay region. The results showed that 36 genera were found. Significant differences in the numbers of total nematodes and trophic groups were observed among continuous cropping times. The highest number of total nematodes was observed at 20-40 cm depth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nematode abundance; Continuous planting; Ecological indexes; Trophic groups; Soil depth. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100006 |
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| Yang,G; Zhang,Z; Zhang,G; Zhang,H; Han,X; Busso,CA. |
| Phosphorus is an essential macronutrient for all living plants and plant production. Simultaneously, atmospheric nitrogen deposition also affects plant productivity at a global scale. However, few studies have investigated how plants respond to P addition while simultaneously considering N deposition. We investigated plant biomass, nutrient status and stoichiometric ratios on Potentilla tanacetifolia in response to P fertilization under contrasting N addition rates in a typical meadow steppe in Inner Mongol ia, China. Aboveground biomass of P. tanacetifolia increased under increasing levels of P fertilization under conditions of N addition. However, there was no significant change in biomass when only phosphorus was added. Plant leaf and stem P... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen; Phosphorus; N: P ratio; Plant organs. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100014 |
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| Peláez¹,DV; Giorgetti,HD; Montenegro,OA; Elia,OR; Rodríguez,GD; Bóo,RM; Mayor,MD; Busso,CA. |
| Fire is a major ecological process within most terrestrial ecosystems. Therefore, understanding the vegetation response to fire is essential to its management. Our objective was to study the effect of a controlled fire, conducted at the end of summer season, on cover and density of the most common woody and herbaceous species in Phytogeographical Province of the Monte, Argentina. In general, after the control fire, the woody species mean percentage cover was significantly lower (p<0.05) in the fire treatment than in the control (no controlled fire). This effect was persistent during the study period. No significant differences (p>0.05) were detected in woody species mean density among treatments throughout the whole study. Desirable perennial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Controlled fire; Desirable grasses; Undesirable woody species; Monte region; Argentina. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200009 |
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| Hu,FL; Liu,B; Liu,ZM; Fang,YT; Busso,CA. |
| Grasslands are one of the most widespread landscapes worldwide, covering approximately one-fifth of the world's land surface, where grazing is a common practice. How carbon storage responds to grazing in steppes remains poorly understood. We quantified the effects of grazing on community composition and species diversity, and carbon storage in two typical grasslands of northeastern China, one in Horqin and the other one in Hulunbeier. In both grasslands, grazing did not infuence plant species diversity. However, it substantially decreased aboveground carbon by 31% and 54% in Horqin and Hulunbeier, respectively. Fenced and grazing treatments showed a similar belowground carbon at both locations. The predominant carbon pool in the study grassland ecosystem... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Species diversity; Carbon allocation; Carbon stock; Optimal partitioning; Community heterogeneity; Soil depth. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100028 |
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| Qian,J; Wang,Z; Liu,Z; Kuang,W; Busso,CA. |
| Understanding the changes in the total bud bank, and its contribution to community regeneration, in response to grassland enclosure to livestock grazing, is crucial for grassland management. Despite its importance, the contribution of the total bud bank and that of different bud types to community regeneration as a whole have been rarely explored. The vegetative offspring recruited from different bud types was investigated in grasslands having different enclosure durations to livestock grazing on a typical steppe of Inner Mongolia, China. Total vegetative offspring density was significantly higher (p<0.05) under continuous grazing than in fenced grasslands, but no significant changes were found among plots with different enclosure durations to livestock... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grazing; Bud banks; Vegetative regeneration; Reproduction ecology; Restoration ecology. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200024 |
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| Bonvissuto,GL; Busso,CA. |
| Seed rain has ecological consequences on plant community structure. This study was conducted in the Monte Austral Neuquino nearby the town of Picún Leufú, Province of Neuquén, Argentina, within an area of 15 km x 15 km (39º 20 32' S; 69º19 30' W). Studies were conducted at two sites, distant 1.5 km from one another. Vegetation is distributed on the soil surface as vegetation patches. Four superficial locations may be found in the soil of these patches: location 1, small dune accumulated under the lee; location 2, found at the edge of the small dune, and below the major grass canopies and tallest shrubs; location 3, located at the edge of the vegetation patch, and location 4 which includes the uncovered corridors among vegetation patches. Seed rain was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed rain; Shrub and grass species; Vegetation patches; Arid Argentina. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572007000100005 |
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| Registros recuperados: 13 | |
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