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University of Horticultural Sciences, Bagalkot (2019)

SPATIAL AND TEMPORAL DISTRIBUTION OF SALTS IN THE SOILS OF VINEYARD AT BAGALKOT

PALLAVI C N,

Titre : SPATIAL AND TEMPORAL DISTRIBUTION OF SALTS IN THE SOILS OF VINEYARD AT BAGALKOT

Auteur : PALLAVI C N,

Université de soutenance : University of Horticultural Sciences, Bagalkot

Grade : Master of Science (MS) 2019

Résumé partiel
Soils and groundwater of Bagalkot district inherently possess high salt contents. Grape, a commercially important fruit crop of the district, is highly sensitive to salt. Grape growers practice drip method for both irrigation and fertigation. Which encourages salt accumulation and thus, influencing both grape yields and quality. A soil survey was carried out in 69 vineyards to assess the soil salinity parameters. Majority of soils were found in slight to moderately alkaline pH range (7.09 – 8.47) while, the salinity ranged from slight to moderately saline (0.69 - 1.69 dS m-1). Water soluble cations in soils were found in the order of Ca2+ > Mg2+ > Na+ > K+ while, the anions were in the order- Cl- > HCO3 - > SO4 2. The water samples were also analysed from 20 vineyards and the water samples were mostly observed in slightly alkaline range (6.89 to 7.64). The electrical conductivity of water ranged from 0.16 to 1.42 dS m- 1. The cations in the water samples were in the order of Mg2+ > Ca2+ > Na+ > K+ while, the anions were in the order Cl- > HCO3 - > SO4 -2. A detailed study was carried out separately on spatial and temporal distribution of salts in a selected grape vineyard. The spatial distribution of salts at 15cm (D1), 30cm (D2), 75cm (D3) and 120cm (D4) from the plant rows were monitored at two different depths (0-20cm, 20-40cm) and three different stages namely before back pruning (S1), growth Stage (S2) and at harvesting Stage (S3).

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