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

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 factorial design with two factors included: Amino acid use (A factor) and time of Amino acid application(B factor). 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 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.The result showed that the highest yield 2435kg.ha-1 belonged to (humiforte+time of 4-6 leaf stage, awn/spike appearance, milky stage treatment compared with control without amino acid use were it increased 232 kg.ha-1 . Results of analysis variance showed that the main effects of free amino acid use, time of amino acid application and interaction effects on grain yield and other plant growth index were,nt significant. Analysis variance data showed the main effect of factor A (amino acid use) on N, P percent in grain were significant at 1% statistical level, also data showed the main effect of factor B ( Time of amino acid use) on N, and K percent in grain were significant at 1% statistical level. The effects of interaction of factor A and factor B on N and P percent in grain were significant at 1% and statistical level.