arid chaco
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2022 ◽  
Vol 172 ◽  
pp. 104362
Emilce Viruel ◽  
Cecilia A. Fontana ◽  
Edoardo Puglisi ◽  
Jose A. Nasca ◽  
Natalia R. Banegas ◽  

Acta Tropica ◽  
2021 ◽  
Vol 224 ◽  
pp. 106158
Miriam Cardozo ◽  
Federico G. Fiad ◽  
Liliana B. Crocco ◽  
David E. Gorla

2021 ◽  
Vol 9 (3) ◽  
pp. 268-279
Deolindo L.E. Domínguez ◽  
Pedro R. Namur ◽  
Pablo F. Cavagnaro

In arid regions, revegetation with locally adapted native species can improve forage production and help ameliorate soil degradation. We investigated the effects of 3 sowing dates and 3 sowing rates of Trichloris crinita cv. Chamical-INTA, a perennial forage grass native to arid and semi-arid regions, on pasture establishment parameters in the Argentinian Arid Chaco phytogeographical region. Sowing date significantly influenced plant density and soil coverage at the end of the growing season, with the latest sowing date increasing mean plant density and soil coverage by 42‒66% and 16‒38%, respectively, relative to the 1st and 2nd dates. Conversely, the later sowing dates (2nd and 3rd dates) exhibited significantly lower mean values for all plant growth-related traits, i.e. tillers per plant, plant height and percentage of flowering plants. Sowing rate had a strong effect on plant density at the end of the growing season but not on plant growth parameters. Under the conditions of this study, using intermediate sowing densities (7.5 kg seed/ha) and sowing early in the season, when temperatures were still mild, delivered the best results in terms of pasture density and establishment efficacy. Early sowing resulted in a greater percentage of flowering plants and seed set prior to the first winter frosts, which should ensure ongoing establishment of plants in the next wet season. Longer-term studies to examine the survival of plants and possible increase in plant density over time are necessary to determine if this procedure has sustainable benefits for pastures in the area.

Agriscientia ◽  
2021 ◽  
Vol 38 (1) ◽  
pp. 1-13
Marcos Sebastián Karlin ◽  
Rubén Coirini ◽  
Ariel Ringuelet ◽  
Javier Bernasconi Salazar ◽  
Amanda Cora ◽  

Forests degradation in arid and semi-arid lands may conduct to the formation of “fertility islands” due to the accumulation of soil particles, water, nutrients and biomass under trees and shrubs. In the Arid Chaco fertility islands are characterised by the presence of Prosopis flexuosa and Larrea divaricata. The objective was to evaluate biophysical variables in soil, microclimate and the plant response under canopy and in intercanopy. Infiltrability, microtopography, soil bulk density, soil and air moisture and temperature, and light were measured under the canopy, at the limit of the canopy and in the intercanopy. These variables were correlated with the litter and plant frequencies associated with the fertility islands. P. flexuosa canopy and litter understorey tend to maintain more soil moisture compared with the intercanopy, by reducing soil and air temperature and by increasing air moisture. This increases the frequency of Dyksterhuis’ decreaser species. Under L. divaricata the canopy effect is not as effective as that of P. flexuosa and understorey plant response is not significative.

2021 ◽  
M. Lucrecia Lipoma ◽  
Diego A. Cabrol ◽  
Aníbal Cuchietti ◽  
Lucas Enrico ◽  
Lucas D. Gorné ◽  

2019 ◽  
Vol 25 (2) ◽  
pp. 195-202
Maria Gracia Senilliani ◽  
Cecilia Bruno ◽  
Miguel Brassiolo

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