Abstract
Aim of study: The main aim of this study was to evaluate the effect of overliming with dolomitic lime on the topsoil and grapevine macro-nutritional levels (both petiole and grape tissues), as well as on berry weight and must quality properties in grapevines growing on an acid soil.Area of study: The study was carried out in the viticultural region of El Bierzo (Spain), one of the main wine protected designation of origin in the northwest of Spain.Material and methods: The effects of overliming were studied in soil parameters, petiole and grape tissues, as well as in must quality during three years (2014-2016). Data analysis was performed using factorial ANOVA (both parametric and non-parametric tests have been used).Main results: The results found on the soil levels of magnesium and phosphorus were mirrored by those shown in petiole and grape tissues. Data suggest that insufficient Mg supply in vineyard acid soils could lead to a lower P vascular movement in vines. Additionally, our findings suggest that a great decrease of K levels in vine tissues as a consequence of overliming, could lead to changes in harvest quality.Research highlights: Overliming with dolomitic limestone in large quantities decreased soil exchangeable K, as well as improved supply of exchangeable Mg and available P. Additionally Mg and P levels in both petiole and grape tissues were significantly affected by overliming.
Highlights
IntroductionAmong the main ones on agricultural land are the application of ammonium-based fertilizers and urea, elemental sulfur fertilizer and the growth of legumes, cause the loss of base cations, an increase in aluminium (Al) saturation and a decline in crop yields (Goulding, 2016)
Soil acidification is caused by a number of factors
analysis of variance (ANOVA) were used to determine if the differences between liming treatments (T) were statistically significant, and if they depended on the year of sampling (Y), and the interactions between both (Table 2)
Summary
Among the main ones on agricultural land are the application of ammonium-based fertilizers and urea, elemental sulfur fertilizer and the growth of legumes, cause the loss of base cations, an increase in aluminium (Al) saturation and a decline in crop yields (Goulding, 2016). This degradation process can be alleviated, or largely avoided by effective crop production practices. The application of adequate quantities of liming materials to acid soils encourages various beneficial physical, chemical and biological changes in the soil. In this sense, liming improves the structural conditions (aeration) and increases the bioavailability of phosphorus (P), Ca, Mg, and molybdenum (Mo) nutrients (Olego & Garzón, 2014)
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