Evaluation the Impact of Mulch Technique and Irrigation Intervals on Coriander Plant Growth, Productivity and Volatile Oil Active Components Under Southern Valley (Toshka) Conditions

Two field experiments were performed during two consecutive seasons of 2018/2019 and 2019/2020 at Toshka Station) Southern Valley(, Desert Research Center, to evaluate the using of mulch technique, irrigation intervals and their interaction treatments on growth, productivity and volatile oil active components of coriander plants under the southern valley (Toshka) conditions. Obtained results indicate the superiority of the interaction between mulch technique and irrigating plants every day or two days compared with other tested treatments. These treatments gave the highest values ​​of growth (plant height, fresh and dry weights/plant) and productivity (number of umbels/plant, seed index, fruit yield/plant and fruit yield/feddan, volatile oil percentage, oil yield and oil yield /fed.) parameters of coriander plant during both seasons. Moreover, Active ingredients of the essential oil reached their maximum values when mulch technique was applied with irrigating plants every two days. Our recommendation is to use mulch technique and irrigating coriander plants every two days to obtain the maximum yield from this plant under Southern Valley (Toshka) conditions.