تقييم التباين في كفاءة استعمال المياه لبعض طرز أكساد من القمح القاسي و الطري

الملخص EN

Agricultural pot and field experiment was carried out at Izraa Research Station (ACSAD) during the growing season 2016/2017, to evaluate the variation of water use efficiency and some physiological traits of some wheat genotypes at plant and field level, these genotypes are: Five genotypes of bread wheat (Acsad885, Acsad899, Acsad969, Acsad901, Acsad1133), and five genotypes of durum wheat (Acsad1107, Acsad1105, Acsad1187, Acsad1229, Acsad65).

Statical analysis results of pot culture experiment indicated significant differences among Sudied genotypes in moS investigated traits, the mean value of leaf area duration was the higher in the genotype Acsad1229 (6.86 cm2.

day-1) followed by the genotype Acsad969 (6.23 cm2.day-1).

Whereas, the loweS leaf area duration was recorded in the genotype Acsad1187 (3.96 cm2.

Day-1).

The mean value of total dry matter was the highest in the genotype Acsad1229 (4.84 g.plant-1) followed by the genotype Acsad969 and Acsad1107 (4.58 and 4.31 g.plant-1 respectively).

Whereas the loweS dry matter accumulation was recorded in the genotype Acsad65 (2.84 g.plant-1).

The higher mean value of water use efficiency was recorded in the genotype Acsad1229 (1.39 g dry matter.

Kg-1 water) followed by the genotype Acsad969, Acsad1105 and Acsad885 (1.27, 1.24 and 1.10 g dry matter.

Kg-1 water respectively) without significant differences among them, the loweS was recorded in the genotype Acsad1107 (0.95 g dry matter.

Kg-1 water).

Regarding the field experiment, the mean value of grain and biological yield were the higher in the genotype Acsad1229 (5300 kg.ha-1 and 13200 kg.ha-1 respectively) followed by the genotype Acsad969 (4900 and 12800 kg.

ha-1 respectively), whereas the genotype Acsad65 recorded the loweS grain yield (3430 kg.ha-1) and the genotype Acsad1187 the loweS biological yield (8300 kg.ha-1 respectively).

The mean value of water use efficiency was higher in the genotype Acsad1229 (1.603 kg grains.m-3) followed by the genotype Acsad969 (1.474 kg grains.m-3) and the genotype Acsad1107 (1.444 kg grains.m-3) without significant differences among them.

whereas the genotype Acsad1187 regi^ered the loweS water use efficiency (0.992 kg grains.m-3).

This Sudy showed that wheat genotypes surpassed significantly in growth parameters, dry matter accumulation and water use efficiency in pot culture experiment (Acsad1229, Acsad969 and Acsad1107), surpassed also at field level in the grain yield and water use efficiency.