Terroir 2008 banner
IVES 9 IVES Conference Series 9 Ten years soil diagnosis in vineyards, with particularly analysis of organic and microbial mass and measuring their evolution

Ten years soil diagnosis in vineyards, with particularly analysis of organic and microbial mass and measuring their evolution

Abstract

Since 1996, we study the soil in viticulture, specially in the South of France. In the field, we delimit soil units and observe soil profiles and take samples to analyse its physical, mineral, organic and microbial mass composition. We also analyse the rate of roots mycorhization. 
For few years we used both Y. HERODY (BRDA) analysis and Xavier SALDUCCI (CELESTA) ones. Since 2004 we have adopted only Xavier SALDUCCI analysis menu : two compartments of organic matters, microbial mass and mineralization activities of carbon and nitrogen. 
Here are shown the results of 100 organic and biological analysis: 
– Carbon level is low to very low (less than 10 g /kg ) : 56% of the plots. 
– Nitrogen level is low to very low (less than 1 g/kg) : 64% of the plots. 
– Microbial mass is low in 71% of the plots (less than 200 mg of microbial C /kg). No plot has a level higher than 400mg of microbial C /kg. 
– Carbon Mineralization Activity is high to very high, more than 400mg mg C-CO2 /kg/28 days, in 49% of the plots 
– Nitrogen Mineralization Activity is low to very low (less than 1 mg de N-NO3– N-NH4+ /kg/28 days) : 53% of the plots. 
Since 2006, we control organic and biological evolution specially in plots where green manures and composted organic matters have been used. In 4 plots where the analysis showed (in 2001) a very high lake of organic matter and microbial mass, we not that : 
– The organic matter level has been partially improved . Bt the rate is still low in two parcels. 
– The microbial mass has been improved even it is still low in two parcels. 
Even, if the levels are still low, the vine is more healthy : no more nutrients deficiency symptom, the vine growth is more homogenous, the yield and the crop quality have increased, with a real expression of the “Terroir”. 

Download the PDF

DOI:

Publication date: December 8, 2021

Issue: Terroir 2008

Type : Article

Authors

Karim RIMAN 

Consultant en agriculture écologique 
Mas de La Cigalière – RN 100 – 84250 Le Thor – France 

Contact the author

Keywords

diagnostic du sol viticole, matière organique, biomasse microbienne, minéralisations du carbone et de l’azote

Tags

IVES Conference Series | Terroir 2008

Citation

Related articles…

Rare earth elements in grapes and soil: study of different soil extraction methods

Lanthanides, together with scandium and yttrium, make up the group of Rare Earth Elements (REEs). An official method for analysis of the bioavailable REEs accumulated by plants, depending mainly on soil characteristics, chemical speciation in soil and the specific ability of the plant, is still lacking.

Read More

Circular viticulture: transforming grapevine waste into sustainable fibers

Annually, around 31.95 million tonnes of grapevine prunings are produced worldwide as agricultural waste.

Read More

Mapping of canopy features in commercial vineyards using machine vision

Vineyard canopy features such canopy porosity and fruit exposure influenced microclimate, fungal disease incidence and grape composition. An objective, rapid and non-invasive method to assess and map the canopy status is needed to apply in precision viticulture. A new method for canopy status assessment and mapping based on non-invasive machine vision was applied in commercial vineyards in this work.

Read More

Physiological and performance responses of grapevine rootstocks to water deficit and recovery 

Rootstocks play a key role in the grapevine’s adaptation to the increasing soil water scarcity related to climate change. A pot experiment carried out in 2022 aimed at assessing the physiological responses of seven ungrafted rootstocks to a progressive soil water deficit and a subsequent recovery to field capacity.

Read More

Variability in the content of coarse elements in a viticultural plot in the Graves appellation: relationship with geophysical data

Il a été souvent démontré (Seguin, 1970), que les meilleurs terroirs sont ceux qui présentent pendant la période de maturation du raisin, une régulation et une limitation de l’alimentation hydrique de la vigne. Si on s’intéresse aux facteurs influençant ce régime hydrique, on constate le rôle prépondérant du taux d’éléments grossiers non poreux qui limitent la réserve utile du sol en diminuant le taux de terre fine. De plus, ces éléments grossiers jouent également un rôle au niveau du pédo-climat thermique car leur conductivité thermique et leur chaleur spécifique sont plus élevées que celles de la terre fine. Ainsi le sol se réchauffera et se refroidira plus rapidement (Saini et McLean, 1967), (Gras, 1994).

Read More