Abstract
Phosphorus (P) is an essential element for vineyard productivity. This study assessed the influence of parent material on organic P fractions in vineyard soils of basaltic and rhyodacitic origin. The experiment was conducted in four municipalities located in mountainous regions in Santa Catarina, Brazil: Urubici, São Joaquim, Campos Novos, and Água Doce. Disturbed soil samples were collected between grapevine rows at depths of 0.00–0.05, 0.05–0.10, 0.10–0.20, and 0.20–0.40 m. Soil chemical attributes (pH in H2O, Ca2+, Mg2+, Al3+, P, K+, and H + Al), total organic carbon (TOC), available and residual P, labile P (extracted with sodium bicarbonate), moderately labile P (extracted with sulfuric acid), and moderately resistant P (extracted with sodium hydroxide) were determined. Soil parent material influenced the dynamics of phosphorus in vineyard soils. Both P forms (available and solution equilibrium P) and P organic fractions (labile, moderately labile, and moderately resistant P), are affected by the parent material. Basaltic soils had higher TOC, available and residual P, and moderately labile and moderately resistant P, whereas rhyodacitic soils showed higher labile P. The high levels of moderately labile and moderately resistant P fractions in basaltic soil were attributed to its high TOC, available P, and residual P contents. Parent material was found to influence organic P fractions in vineyard soils.
Highlights
Brazil is the fifth-largest wine producer in the Southern Hemisphere and has one of the fastest-growing wine markets in the world, with over 79 thousand hectares of vineyards (Ibravin, 2018)
Considering the importance of P for the production and management of vineyards, this study aimed to assess the influence of different soil parent materials on organic P fractions in vineyard soils
The study area is located within the Serra Geral Formation. It comprises four municipalities located in mountainous regions of the state of Santa Catarina, Brazil: Urubici, São Joaquim, Campos Novos and Água Doce
Summary
Brazil is the fifth-largest wine producer in the Southern Hemisphere and has one of the fastest-growing wine markets in the world, with over 79 thousand hectares of vineyards (Ibravin, 2018). Wine production is mainly concentrated in the southern region, where, in addition to being an important economic activity, it has a significant sociocultural value. In 2012, 21 million liters of wine were produced in Santa Catarina, 72.57% of which was table wine (Mello, 2013). Grapes produced in Santa Catarina differ from those produced in other regions of the country because of the unique climate characteristics of the state. Santa Catarina’s mild summers allow grapevines to have a long growth cycle and reach full maturation, important factors to produce high-quality wines (Borghezan et al, 2011). High altitudes affect night temperatures at harvest, resulting in a more complete phenolic maturation and, better product quality (Camargo et al, 2011)
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