Izvorni znanstveni članak

https://doi.org/10.37427/botcro-2020-011

Optimizing irrigation and determining the most sensitive development stage to drought in barley (Hordeum vulgare L.) in a semi-arid environment

Leila Romdhane orcid.org/0000-0001-5147-5688 ; University of Carthage, National Institute of Agronomic Research of Tunisia, Hédi Karray Street, 2049 Ariana, Tunisia
Nicola Dal Ferro orcid.org/0000-0001-7957-3212 ; University of Padova, Department of Agronomy, Food, Natural Resources, Animals and Environment, Viale dell’Università 16, 35020 Legnaro, Padova, Italy
Amor Slama orcid.org/0000-0002-9386-5964 ; University of Carthage, Faculty of Science, 7021 Jarzouna-Bizerte, Tunisia
Leila Radhouane orcid.org/0000-0001-8911-516X ; University of Carthage, National Institute of Agronomic Research of Tunisia, Hédi Karray Street, 2049 Ariana, Tunisia

Sažetak

Rising temperatures and increasing water scarcity, which are already important issues, are expected to intensify in the near future due to global warming. Optimizing irrigation in agriculture is a challenge. Understanding the response of crop development stages to water deficit stress provides an opportunity for optimizing irrigation. Here we studied the response of two barley varieties (Rihane, Martin), to water deficit stress at three development stages (tillering, stem elongation, and heading) by measuring water status and grain yield components in a field experiment in Tunisia. The three stages were selected due to their importance in crop growth and grain development. Water deficit stress was initiated by withholding water for 21 days at the three stages with subsequent re-watering. Water deficit led to a progressive decrease in leaf water potential. In both varieties, heading was the stage most sensitive to water deficit. Leaf water potential measurements indicated that water deficit stress was more severe during heading, which to some extent may have influenced the comparison between growth stages. During heading, the number of ears per plant and weight of a thousand grains were reduced by more than 70% and 50%, respectively compared with stress at tillering. Comparison of yield components showed differences between the two barley varieties only when the water deficit was produced during the tillering stage.

Ključne riječi

barley; climate change; crop development stage; grain yield components; leaf water potential; water deficit

Hrčak ID:

235026

URI

https://hrcak.srce.hr/235026

Datum izdavanja:

1.4.2020.

Posjeta: 1.718 *