تأثير التقسية الملحية للبذور في مقاومة بعض أصناف القمح للإجهاد الملحي تحت ظروف الري بمياه الصرف الزراعي المالحة

الملخص EN

Three of ACSAD,s varieties of wheat, (Douma 1, Douma 2 and Douma 4), were tested after priming with salt hardening by soaking the seeds into the saline drainage water (EC =5.89 dS/m), for (12) hours before seeding.

Plants were irrigated with (4) levels of saline waters, (0.8, 3.46, 4.47, 5.89) dS/m, during the growing season.

Salt hardening of seeds increased the plant salt tolerance and showed a significant effect on the growth and production of the three tested varieties of wheat, where the average dry matter yield of two cropping years, increased by (15%) for the total straw and grains and (14%) for the grains only in comparison with the control treatments, with indication to that (Douma 4) showed higher resistancy to salinity than other two varieties.

Determination of Na and K in the plant tissues at the end of the growing season showed that yet, was no significant effect on the absorption of Na and K, by the salt hardening treatments.

There was a noticeable increase in K concentration in the plant tissues.

And showed also that, the productivity of the three tested varieties, correlated negatively with Na, and positively with K.

Douma 4 the highest productive of the three tested varieties, showed higher ability to accumulate higher amounts of K and lower amounts of Na in the tissues.

While Douma 1, the lowest productive variety, followed the opposite trend, which increases the essentiality of the role of K under saline conditions.