Growth and productivity of wheat as affected by some growth retardants under water stress conditions in newly cultivted sandy lands
2005
Ahmad, Muhammad A. | Badr, Nadya M. | Shalabi, Magda A.
Two Field experiments were carried out to study growth and productivity of wheat as affected by some growth retardants under water stress. The main obtained results were growth parameters, i.e. plant height, number and dry weight of tillers, blades and spikes /plant, flag leaf area, blades area/plant and LAI were significantly decreased under the water stress conditions. On the contrary, SLW increased under water stress treatments. Furthermore, results indicated that wheat plants appeared to be more sensitive to water stress during tillering stage, followed by heading stage meanwhile,the harmful effect caused under milkripe stage stress treatment was the lowest one. On the other hand, the greatest value of SLW was obtained by skipping an irrigation at heading stage, followed by skipping an irrigation at tillering stage whereas the smallest value obtained under skipping an irrigation at milk-ripe stage. Spraying whe at plants with 20 ppm uniconazole and / or 750 ppm cycocel seemed to be the most favourable treatments to increase plant height, number and dry weight of tillers, blades and spikes/plant, flag leaf area, blades area/plant and LAI, however, the greatest value of SLW produced by spraying wheat plants with 1250 ppm cycocel.Yield and its components, i.e. plant height, number of tillers and spikes/plant, number of spikelets/main spike, spikes weight/plant, grain, straw and biological yield/plant and /or fed. protein %per grain
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