Effect of the arrangement of drip irrigation laterals and partial soil drying on potato yield

Abstract

In the present investigation, the effect of the disposition of the drip irrigation laterals on the potato yield was evaluated, using the partial drying of roots SPR, replacing a sheet of water of 100 and 50% of the evapotranspiration of the crop ETc. The experimental design was made based on the Completely Random Factorial Design considering two factors: (a) types of lateral arrangement (T-1 parallel arrangement and T-2 linear arrangement) and (b) irrigation types (100% ETc SPR1 and 50% ETc SPR2), obtaining four treatments as a result. The application of the SPR was carried out in two periods: the first, between days 20-29 after planting (during growth) and the second, between days 76-94 after planting (during maturity). Total and commercial yield as well as water productivity were evaluated. The results show that the type of irrigation had a greater incidence in the total yield of the crop with yields between 61 and 64 t/ha, while the disposition factor had a greater incidence in the commercial yield with yields between 51 and 60 t/ha. Water use efficiency varied between 38 and 47 kg/m3.

Keywords

• drip irrigation
• partial wetting
• partial irrigation
• potato yield