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Effect of differential fertilisation treatments on maize hybrid quality and performance under environmental stress condition in Hungary

2019; Experimental Institute for Cereal Growing; Volume: 64; Issue: 2 Linguagem: Inglês

2279-8013

Adrienn Széles, János Nagy, Tamás Rátonyi, Endre Harsányi,

Genetics and Plant Breeding

The correct choice of genotypes, able to overcame environmental stress conditions and genotype-adapted nutrient supply are very important, as they largely determine the efficiency of cultivation. Our aim was to quantify the effect of fertilization and of meteorological stress factors on the yield of genotypes and protein content of maize grain. Our studies were conducted in Hungary in the long-term field trial of the University of Debrecen in years with favourable (2016) and unfavourable water supply (2017) by using 5 different genotype hybrids, with ten NPK treatments (T) and without fertilization as control. In the group treated with the combination of increasing N+equally increasing PK, decrease in yield during stress was lower than in the case of combinations with increasing N+constant PK treatment. The effect of weather-stress factors could be decreased with hybrid specific nutrient supply. The hybrids Renfor, Fornad, and Sushi reacted with the lowest yield reduction to the T10 treatment combination as a result of the negative weather conditions, while the Armagnac preferred T7 and Loupiac T9 treatments. Armagnac reached its highest protein content – irrespective of the production year – with T5 (P<0.05) combination, while in the case of Loupiac, the favourable value was ensured by T4 treatment combination (P<0.05). In the case of Fornad, Renfor and Sushi, highest protein content was determined by higher treatment combinations in 2016, while in 2017, lower combinations showed the same results as higher ones.