Foliar application of Phosphorus and Water Stress on Dry Matter Accumulation of Barley species

To study effect of foliar Phosphorus application on dry matter accumulation of two barley species under cut off irrigation, in crop years 2010-2011, the experiment was conducted in Damghan in the form of twice crushed karts in the random blocks by three times repeating each experimental unit. The Treatments were water stress (three levels including the normal irrigation and water outage in stage 61 and 71 BBCH). The foliar phosphorous in three levels were observing the 50% concentration (28% phosphite, 25% potassium) and 100%spraying (28% phosphite, 25% potassium) on two species (Karoun and Kavir). The results indicated that the water outage stress has a significant (P<0.01) effect on the characteristics as dry weight of stem, of awn, the dry weight of the spikelet and the dry weight of pods. It resulted in a reduction in these traits. Though the factor of phosphorous spraying just affected (P<0.01) the dry weight of spikelet characteristic and the interactional effect of species ×spraying× water outage was only affecting the dry weight of stigma leaf (P<0.01). In the water outage condition, spraying had a negative impact on the plant DMD. The best care among the interacting cares to obtain favorable dry matter accumulation in the plant was normal irrigation, 100% concentration phosphorous spraying and Karun specie. Final outcomes of the study is The aim of this study evaluation effect of drought stress in filed condition on Damghan semi arid zone and positive effect of phosphor foliar application in reduce of water stress in the yield of barley.

Dry matter accumulation/ phosphorous spraying/ water outage stress/ barley