EFFECT OF SOIL AND SPRAY APPLICATION OF DIFFERENT AMINO ACIDS ON GROWTH OF TOMATO IN DESERT ZUBAIR SOIL

A field study was conducted in Berjesia experiment station at winter season 2009-2010 in loamy sand texture soil classified as Typic quartiz pasament . Split-split plot and methods of application in RCBD design was used. The aim of the experiment was to test the different levels of amino acids on decreasing the stress of water salinity (well water) and growth of tomato plant c.v. Al- Hutoof hybrid. The field experiment consist of 30 treatments :the main factor was method of application amino acids by spray or with irrigation water ; the secondary factor type of amino acids (Tyrosine ,Proline ,Arginine) and their combination in mono , di or triple mixture and three levels of amino acid (0 100 '200 A) mg L-1 was used . Results indicated the significant effect of all amino acid with different level on decreasing the stress effects of salinity The best result for all grow parameters of tomato plant when three amino acids were mixed and sprayed in200 mg l(-1) comparing with control treatment . It increased the plant height by 27.2%; leaf area by 17.3%; dry weight of shoot by 19.8%; dry weight of roots by 55.8% and dry wt. of root\ and root to shoot ratio by29.1% , all increasment were significant at by 0.05 level