Bioinputs effect on response capability of potato landraces (Solanum tuberosum L.) to drought

In agronomic season 2011-2012, in order to evaluate the bioinputs effect on drought response, 15 potato landraces were assessed along with control Waych'a in Kewinal (Sacaba). The experimental design was the incomplete block design in strip plots arrangement. The factors were: Bioinputs applied during the Sown (1=Poultry manure in a dosis of 10 t.ha(-1), 2 = Earthworm Humus in a dosis of 3 t.ha(-1) + Mibac 10 kg.ha(-1) (Bacillus subtilis and Glomus fasciculatum) and 3 = Earthworm Humus in a dosis of 3 t.ha(-1)), Cultivar (15 native potato cultivars: six tetraploids and nine diploids) and Drought (1 = without drought y 2 = drought: 37 days without watering). The results showed that the poultry manure reduced the drought severity and increased the recovery ability and yield under drought in higher amount (P<0,01) than the earthworm Humus (P<0,01) and the earthworm Humus + Mibac (not significant). Yana Sutamari (among tetraploids) and Puka Taca (among diploids) cultivars had the highest resistance, the highest recovery degree and the highest yields under drought. The Pearson correlation analysis showed that for poultry manure, the plants with lower drought severities had higher recovery values (P<0,01). For Humus, the plants with higher chlorophyll contents were more drought resistant (P<0,01) and for all three bioinputs in general, the plants with thicker stem diameter (more vigorous) were more resistant and had higher yields under drought.