Boron Status of Table Grape (Vitis Vinifera L.) Grown on Sandy and Calcareous Soils Received Irrigation from Blend Water

Document Type : Original Article

Authors

1 Soil and Water Sciences Department, Faculty of Agriculture, Alexandria University, Egypt

2 Soil and Water Science Department, Faculty of Agriculture, El-Shatby, Alexandria University, Egypt.

Abstract

The present study aimed to evaluate B status of grape (Vitis vinifera L.) received drip irrigation from blend water source (Neil Rever water mixed with agriculture drainage). Some plots in two farms representing sandy non-calcareous and calcareous soils were selected. Soil samples were collected at three intervals of 0 – 90 cm depth at the beginning of the season and analyzed for hot water extractable-B, organic matter (OM), soil salinity (ECe), and CaCO3 content.  B was measured in the applied compost and monitored in irrigation water, petioles, and leaves of the growing grape.
Results indicated that the estimated B input per year was 1.87 kg B ha-1from the irrigation water and the applied organic compost. The hot water extractable-B was higher in the calcareous than that in the sandy soil and tended to increase with soil depth in both soils with higher magnitude in the calcareous soil profile. Regardless soil type, extractable-B was correlated with CaCO3 content. Consequently, average of B concentration in petioles of grape grown on calcareous soil was 64.4 ±11.6 at flowering which increased to 84.5 ±8.5 mg B kg-1 DM at veraison stage compared to values those did not exceed 58.7 at both stages in sandy soil.  Monitoring of B in leaves clearly showed accumulation with time where the highest B concentration was observed at the post harvest stage with an average of 120.7 ±17.0 mg B kg-1DM in the old and 123.3 ±13.4 in the young leaves of grape grown on the calcareous soil.
 Regardless of the soil type, significant positive relationship was obtained between B concentration in the old leaves and hot water extractable-B from soil at flowering and veraison stages. The predicted critical B concentration in soil was 2.3 at flowering and 1.8 mg kg-1 soil at the veraison stage. The high temperature during the veraison stage is expected to enhance the transpiration, water uptake, and B uptake and concentration in leaves and, therefore, the critical level of B in soil should be kept at lower level than that at flowering. 

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