Bare soil cover and arbuscular mycorrhizal community in the first montane forest restoration in Central Argentina

2019 ◽  
Author(s):  
Alejandra G. Becerra ◽  
Adriana Diván ◽  
Daniel Renison
2015 ◽  
Vol 33 (2) ◽  
pp. 261-266 ◽  
Author(s):  
Márcia M Echer ◽  
Graciela M Dalastra ◽  
Tiago L Hachmann ◽  
Elcio S Klosowski ◽  
Vandeir F Guimarães

An important aspect in the cultivation of vegetables is the quality of the product to be marketed, free from dirt and damage and the practice of mulching could be an option, but there is scarse information. The aim of this study was to evaluate the influence of mulching on the production traits of three cultivars of Pak Choi. The experiment was set up during March to May 2013 using a split plot randomized block design, with four replications. Soil cover treatments (white agrotextile, black agrotextile, black plastic, silver plastic, tifton straw and bare soil) were arranged in the plots, and three cultivars of Pak Choi (Green Pak Choi, White Pak Choi and Chingensai Natsu Shomi) in subplots. Height and diameter of shoots, number of leaves, fresh weight of the head and petiole, base diameter, dry weight of stem, petiole, and leaf were evaluated thirty-five days after transplantation. The total dry weight and leaf area were measured, and then we estimated the yield. There was a significant effect of soil cover and cultivar. In general, the cover with synthetic materials showed higher values on production of Pak Choi. The cultivar White Pak Choi was better adapted to the growing conditions, with an average yield of 57.78 t/ha.


Author(s):  
Tulasikorra ◽  
O. Siva Devika ◽  
K. Mounika ◽  
I. Sudhir Kumar ◽  
Suman Kumar ◽  
...  

2018 ◽  
Vol 36 (2) ◽  
pp. 108-111
Author(s):  
Mieke van der Heyde ◽  
Hongguang Liu ◽  
Brian Ohsowski ◽  
Miranda Hart

CERNE ◽  
2017 ◽  
Vol 23 (3) ◽  
pp. 377-385
Author(s):  
Nicolás Marro ◽  
Florencia Soteras ◽  
Noelia Cofré ◽  
Ignacio Ibarra ◽  
Romina Torres ◽  
...  

ABSTRACT Knowledge about tree production practices is essential to support forest restoration projects, but is still lacking for many tree species. Maytenus boaria is a neotropical tree distributed across the temperate and subtropical South American mountains. In central Argentina, it is mainly restricted to the most preserved forest remnants. Attempts to plant this species have had little success due to difficulties in seedling production and low seedling survival. We set up four trials aiming to identify the constraints of seedling production and outplanting. Under greenhouse conditions, we evaluated (i) pre-germination treatments and (ii) seedling response to inoculation with arbuscular mycorrhizal fungi (AMF). In the field, we planted M. boaria saplings as well as saplings of the most abundant tree in our study site and recorded (iii) survival and height for 10 years. Finally, (iv) we quantified natural recruitment in an attempt to determine M. boaria regeneration niche. Germination varied from 13.1 to 29.2% among treatments. Depulped seeds stratified at 5 ºC showed the highest germination (29.2%). Shoot phosphorus concentration in AMF-treated seedlings was significantly higher (45%) than in non-inoculated seedlings. Survival of M. boaria saplings was similar to that of the most abundant tree in our study site, but their lower height suggested limited growth. We recorded low abundance of M. boaria seedlings in the field; therefore, we were unable to identify the characteristics of its regeneration niche. Reforestation activities should include seed depulping and stratification at 5 ºC to improve germination. The capacity of AMF to enhance nutrition should be evaluated under field conditions.


OENO One ◽  
1995 ◽  
Vol 29 (3) ◽  
pp. 131
Author(s):  
Olivier Igounet ◽  
Charles Baldy ◽  
Jean-Pierre Robin ◽  
Jean-Claude Boulet ◽  
M. Sanon ◽  
...  

<p style="text-align: justify;">Air temperature as well as internal and surface temperatures (by infrared radiothermometry) of grape berries of vineyards (var. Syrah) under which we place different soil cover : bare soil, polyethylene and aluminium were monitored during the swelling and the ripening stages at the « Institut National de la Recherche Agronomique » experimental station at Pech Rouge, Gruissan (France). Results showed there were significant differences in the thermal responses of the grapes with respect to the type of soil cover and degree of fruit ripening. High differences in temperatures between grape and air were observed in soil covered with aluminium sheet which reflected most of the incident solar radiation. For this cover, biochemical analysis of berries and must indicate an increase of sugars grade and alcoholic degree. Statistical analysis were carried out to determine the influence of climatic variables on the grape temperatures. Solar radiation, wind and air temperature are the parameters which seem the main factors, nevertheless, their influence evolve during the process of grape maturation.</p>


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