Relation of irrigation intervals to yield and its components of some Egyptian cotton varieties

الملخص EN

This field study was carried out at Plant Production Department, Faculty of Agriculture (Saba Basha), Alexandria University, Egypt, during 2018 and 2019 seasons to determine the relation of irrigation intervals to yield and yield components of some Egyptian cotton cultivars.

The yield trial was conducted at Sakha Agricultural Research Station, Agricultural Research Center, Egypt.

Three interval irrigation treatments (A) were used every 14, 22 and 30 days.

Three Egyptian cotton (B) i.e.

Giza 86, Giza 92 and Giza 94 were chosen for this study.

All the treatments were randomly distributed in strip design system in three replications.

Results showed that the highest mean values were recorded by A1, (irrigation every 14 days) for boll weight, number of bolls per plant, seed cotton yield/plant, seed cotton yield/feddan, lint cotton yield/plant, lint cotton yield/feddan, lint cotton percentage and seed index in both seasons.

On the other hand, the lowest mean values were given by A3, (irrigated every 30 days) for all studied traits.

Likewise, the highest mean values were recorded by cotton variety (Giza 94) for all studied traits under the irrigation intervals compared with cotton varieties Giza 92 and Giza 86 at 2018 and 2019 seasons.

The results also cleared that the less effect of water stress condition was recorded by Giza 94 cotton variety and the highest effect for water stress on yield and yield component was given by Giza 92 cotton variety.

From the aforementioned results, Giza 94 can be planted in the regions with limited water resources and be used as a parent to produce new that are more tolerant to drought stress.