Effect of different doses of nitrogen fertilizer on productivity of durum wheat (Triticum durum)‎ cultivars : a multivariate approach

Abstract EN

Seven wheat (Triticum durum) cultivars were evaluated at four nitrogen levels (0Kg / ha, 80kg/ha, 120kg/ha and 160kg / ha).

MANCOVA analysis was used to test the effects of different nitrogen levels simultaneously on grain yield, stalk yield and harvest index.

A multivariate analysis of variance was used to test the effect of the two factors (four levels of fertilizers and seven cultivars) on the responses and the interactions.

The results revealed a significant correlation between the covariates and dependent variables (DV) : grain yield, stalk yield and harvest index.

The interactions between fertilizers and cultivars were not significant for grain yield and harvest index while they are significant for stalk yield.

Cultivar Cham-1 was the best for grain yield, stalk yield and harvest index.

Fertilization showed highly significant effect the different cultivars with 160kg/ha as the best resulting in higher grain yield (3.595 t/ha), stalk yield (12.70t/ha) and harvest index (36.36 %).