Spatial and temporal changes to the water regime of a Mediterranean vineyard due to the adoption of cover cropping

Abstract The use of cover cropping is currently increasing in vineyards but its development remains hampered in Mediterranean regions because of the possibility of severe competition for resources. However, recent studies on intercropping in vineyards have shown that in some situations, water stress may not be greater than that prevailing in bare soil vineyards. Over a 4-year period, we studied the effects of introducing a cover crop in terms of temporal and spatial (i.e. row vs. inter-row) changes to the water regime of a Mediterranean vineyard. The experiments compared the water dynamics prevailing under three different treatments: a perennial cover crop, annual cover crop or the use of chemical weed control. A compensatory growth of the grapevine root system was revealed, thus partly prevented direct competition for resources between it and the intercrop. The rooting of a permanent cover crop was deeper than that of an annual crop, with a higher root density. Consequently, the soil compartment dried by the cover crop was larger and the grapevine was forced to explore deeper soil layers. In the presence of a cover crop on the inter-row, the grapevine also concentrated its root system below the row and dried out this soil compartment more intensively. Overall, associating grapevine with a cover crop led to a spatial distinction of soil zones exploited by the two species. The present study provides evidence that this spatial shift mainly resulted from a temporal shift in the dynamics of resource uptake by the associated species. Indeed, cover crops began to take up water before grapevine budbreak and had almost completely dried out the soil compartment they explored before grapevine water uptake became significant. This led the grapevine to modify its rooting and explore other soil zones. This phenomenon is possible in deep soils and limits competition for water between the grapevine and cover crop. Such competition is also reduced because of better soil water replenishment during the winter in the presence of a cover crop. Nevertheless, our experiments showed that this additional water mainly benefited the intercrop and did not totally compensate for transpiration by the grass cover. In conclusion, this work shows how cover cropping can spatially and temporally modify the water regime of a vineyard, and how grapevine can partially adapt to limit water competition under certain conditions. These findings provide a clearer understanding of the water dynamics prevailing in such a system, and an opportunity to model these dynamics.

[1]  J. Chopart,et al.  Development and validation of a model to describe root length density of maize from root counts on soil profiles , 1999, Plant and Soil.

[2]  Walter D. Willms,et al.  Quantification and simulation of surface runoff from fescue grassland watersheds , 2003 .

[3]  A. Pellegrino,et al.  Relationships between plant and soil water status in vine (Vitis vinifera L.) , 2005, Plant and Soil.

[4]  Narendra Singh Raghuwanshi,et al.  Effect of watershed subdivision on simulation of water balance components , 2006 .

[5]  M. Norton,et al.  Summer dormancy in Festuca arundinacea Schreb.; the influence of season of sowing and a simulated mid-summer storm on two contrasting cultivars , 2006 .

[6]  J. Lampurlanés,et al.  Growth, yield and water productivity of barley (Hordeum vulgare L.) affected by tillage and N fertilization in Mediterranean semiarid, rainfed conditions of Spain , 2003 .

[7]  G. Séguin.  Repartition dans l'espace du systeme radiculaire de la vigne , 1972 .

[8]  B. Huwe,et al.  Below-ground interactions in dryland agroforestry , 1998 .

[9]  P. N. Nelson,et al.  Using Soil Water Depletion to Measure Spatial Distribution of Root Activity in Oil Palm (Elaeis guineensis Jacq.) Plantations , 2006, Plant and Soil.

[10]  R. Morlat,et al.  Influence des terroirs sur le fonctionnement hydrique et la photosynthèse de la vigne en millésime exceptionnellement sec (1990). Conséquence sur la maturation du raisin , 1992 .

[11]  W. Trambouze.  Caractérisation et éléments de modélisation de l'évapotranspiration réelle de la vigne à l'échelle de la parcelle , 1996 .

[12]  Mark C. Battany,et al.  Rainfall runoff and erosion in Napa valley vineyards: effects of slope, cover and surface roughness. , 2000 .

[13]  Eric Lebon,et al.  Towards a simple indicator of water stress in grapevine (Vitis vinifera L.) based on the differential sensitivities of vegetative growth components , 2005 .

[14]  J. Tournebize.  Impacts de l'Enherbement du Vignoble Alsacien sur le Transfert des Nitrates. , 2001 .

[15]  Van Genuchten,et al.  A closed-form equation for predicting the hydraulic conductivity of unsaturated soils , 1980 .

[16]  Florian Celette.  Dynamique des fonctionnements hydrique et azoté au sein d’une vigne enherbée sous le climat méditerranéen , 2007 .

[17]  F. Lelièvre,et al.  Survival and recovery of perennial forage grasses under prolonged Mediterranean drought: I. Growth, death, water relations and solute content in herbage and stubble. , 1998, The New phytologist.

[18]  J. Arnold,et al.  Advances in the application of the SWAT model for water resources management , 2005 .

[19]  Samuel R. Schubert,et al.  Agricultural water management in water-starved countries: challenges and opportunities , 2003 .

[20]  Jacques Wery,et al.  Belowground Interactions in a Vine (Vitis vinifera L.)-tall Fescue (Festuca arundinacea Shreb.) Intercropping System: Water Relations and Growth , 2005, Plant and Soil.

[21]  Patrick Andrieux,et al.  Infiltration characteristics of soils in Mediterranean vineyards in Southern France , 1998 .

[22]  R. W. Willey.  Resource use in intercropping systems , 1990 .

[23]  P. Byers,et al.  Dormancy, cold hardiness, and spring frost hazard in "Vitis amurensis" hybrids under continental climatic conditions , 2003 .

[24]  J. Roberts,et al.  Root distributions in a Grevillea robusta-maize agroforestry system in semi-arid Kenya , 1999, Plant and Soil.

[25]  L. S. Pereira,et al.  Crop evapotranspiration : guidelines for computing crop water requirements , 1998 .

[26]  Walter D. Willms,et al.  Simulating daily soil water under foothills fescue grazing with the soil and water assessment tool model (Alberta, Canada) , 2004 .

[27]  J. L. Arrúe,et al.  Influence of fallowing practices on soil water and precipitation storage efficiency in semiarid Aragon (NE Spain) , 2006 .

[28]  R. Stevens,et al.  Grapevine growth of shoots and fruit linearly correlate with water stress indices based on root‐weighted soil matric potential , 1995 .

[29]  C. Ruiz,et al.  Effect of Water Stress on Leaf Area Development, Photosynthesis, and Productivity in Chardonnay and Airén Grapevines , 2002, American Journal of Enology and Viticulture.

[30]  Patrick Bertuzzi,et al.  Comparison of methods for estimating actual evapotranspiration in a row-cropped vineyard , 1998 .

[31]  R. Stevens,et al.  Root length and mass densities of Vitis vinifera L. cultivars ‘Muscat Gordo Blanco’ and ‘Shiraz’ , 1994 .

[32]  M. Ludlow,et al.  Influence of soil water supply on the plant water balance of four tropical grain legumes , 1986 .

[33]  M. Fetene.  Intra- and inter-specific competition between seedlings of Acacia etbaica and a perennial grass (Hyparrenia hirta) , 2003 .

[34]  Jacques Wery,et al.  RELATIONSHIPS BETWEEN PLANT AND SOIL WATER STATUS IN FIVE FIELD-GROWN COTTON (GOSSYPIUM HIRSUTUM L.) CULTIVARS , 1998 .

[35]  Stefanos Koundouras,et al.  Influence de l' alimentation en eau sur la croissance de la vigne, la maturation des raisins et les caracteristiques des vins en zone mediterraneenne (exemple de Nemee, Grece, cepage Saint-Georges, 1997). , 1999 .

[36]  C. Dupraz,et al.  Unusual Fine Root Distributions of Two Deciduous Tree Species in Southern France: What Consequences for Modelling of Tree Root Dynamics? , 2006, Plant and Soil.

[37]  Peter R. Dry,et al.  Factors influencing grapevine vigour and the potential for control with partial rootzone drying , 1998 .

[38]  Jacques Wery,et al.  Differential effects of soil water deficit on the basic plant functions and their significance to analyse crop responses to water deficit in indeterminate plants , 2005 .

[39]  R. Morlat,et al.  Influence du mode d'entretien du sol sur l'alimentation en eau de la vigne en Anjou. Conséquences agronomiques , 1987 .

[40]  M. R. G. Oliveira,et al.  Trench Profile Techniques and Core Break Methods , 2001 .

[41]  P. Andrieux,et al.  Soil surface infiltration capacity classification based on the bi-directional reflectance distribution function sampled by aerial photographs. The case of vineyards in a Mediterranean area , 2005 .

[42]  A. Monteiro,et al.  Influence of cover crop on water use and performance of vineyard in Mediterranean Portugal , 2007 .

[43]  D. E. Miller,et al.  Root Systems in Relation to Stress Tolerance , 1986, HortScience.

[44]  R. Morlat,et al.  Grapevine Root System and Soil Characteristics in a Vineyard Maintained Long-term with or without Interrow Sward , 2003, American Journal of Enology and Viticulture.

[45]  Eric Lebon,et al.  A model-based diagnosis tool to evaluate the water stress experienced by grapevine in field sites , 2006 .

[46]  C. Ong,et al.  Spatial distribution of root length density and soil water of linear agroforestry systems in sub-humid Kenya: implications for agroforestry models , 2004 .

[47]  S. Lavee,et al.  Effect of Grapevine Training Systems on Development of Powdery Mildew , 2001, European Journal of Plant Pathology.

[48]  S. Tamari,et al.  A simple method for determining soil hydraulic properties in the laboratory , 1993 .

[49]  M. Matthews,et al.  Reproductive Development in Grape (Vitis viniferaL.): Responses to Seasonal Water Deficits , 1989, American Journal of Enology and Viticulture.

[50]  Rafael Angulo-Jaramillo,et al.  Testing an infiltration method for estimating soil hydraulic properties in the laboratory , 2002 .