Impact of silicon and humic acid application under water stress condition on some bread wheat cultivars and some soil properties

الملخص EN

Wheat (Triticum aestivum L.) is widely cultivated in the Mediterranean zone where plants generally suffer from water stress during heading and reproductive stages.

This research was carried out in a field experiment at Shandaweel Agricultural Research Station during the two successive growing seasons 2015/2016 and 2016/2017 using water treatments (water stress and well watered) and humic acid (soil application) and silicon (foliar application) on some wheat cultivars (Gemmeiza 11, Shandaweel1, and Sids 12).

The application rate of humic acid and silicon was 2Kg/feddan and 150 ppm, respectively.

The results showed that wheat cultivars had a significant effect on the all studied traits.

Normal irrigation gave the highest significant mean values of all studied traits in both seasons.

Treatment by silicon or humic acid effected significantly in all the studied traits in both seasons as compared to control treatment.

The interaction between irrigation treatments and wheat cultivars were significant or highly significant for most of the studied traits in both seasons.

Moreover, under normal irrigation, there are no changes in some chemical and physical properties of soil, however, there are slightly changes in the physical properties of the soil and a significant changes in the chemical properties under water stress condition.

Using silicon didn’t affect or played any role on soil properties under normal or water stress condition, whereas using humic acid reduced water stress effect on soil properties.