Investigation on the effects of foliar application of free amino acid on the quality and quantity of wheat under dryland condition

In order to studying effects of foliar application of free amino acid on the quality and quantity of wheat in dryland condition, one experimental field carried out based on RCBD as split factorial design with three factors included: fertilizers use (A factor), Amino acid use (B factor), time of Amino acid application(C factor). Fertilizers application with three level [Nitrogen(60Kg.h-1), phosphate(30 Kg.h-1 P2O5)and Nitrogen+phosphate, Amino acid formulation use included four liquid formula (Aminolforte, Kadostim, Fosnutren and Humiforte)with free amino acids and with one control level. Time of amino acid application (4-6 leaf stage, awn/spike appearance, milky stage and 4-6 leaf stage, awn/spike appearance, milky stage). This experiment was conducted in Inseptisols soil of Maragheh agricultural research station for two years (2009-2011) with three replications. Soil samples were taken for physico-chemical analyses from 0-30cm depth in the sowing time. Plant samples were collected for physico-chemical analysis, determination of N and P absorption percent by plant. Wheat growth indices such as numbers of plants per m2, panicle length plant height, number of spiklets in each panicle and number of panicles per area unit were determined. Plant samples were collected for chemical analysis, determination of N, P, K absorption percent by plant and protein percent of seeds. Results of analysis variance showed that the main effects of fertilizers (A factored) on plant height, spike length, grain number per spike, spike let number per spike were significant at 1% statistical levels. The effects of free amino acid on grain yield, plant height and plant number per (m2) was significant at 1% statistical level and biomass was significant at 5% statistical level. The effects of time of amino acid application on grain yield and biomass was significant at 1% statistical level. Interaction effect of free amino acid and time of amino acid application on grain yield and biomass was significant at 1% statistical level.Mean comparison factores on grain yield based on Duncan indicated that all treatments related to check were increased at 1%statistical level. Interaction effect of A,B,C factors on grain yield, biomass and growth index yield,was significant at 1% statistical level. The result showed that the highest yield 2641kg.ha-1 belonged to(nitrogen and phosphate+Aminolforte+time of awn/spike appearance﴿ treatment compared with control﴾without amino acid﴿were it increased 810kg.ha-1 increased