Effect of anti-transpiration in improving growth characteristics of rice under salt stress

Abstract

A field experiment was carried out at the fields of College of Agricultural Engineering Sciences, University of Baghdad / Jadriya during the summer season of 2017. The aim of the study is to find out the role of anti transpiration agents in improving rice growth properties under salt stress. The experiments was designed in a randomized complete blocks with three replicates.Salty water (Q0, Q1, Q2 and Q3) were applied to the main plots while anti transpiration agents (Control, Salicylic acid SA and Kaolin KA) were applied to the sub plots. Rice was grown by using the dry method. The results of the statistical analysis were shown: Irrigation water Q1 (25% saline water followed by 75% river water) provide highest mean of flag leaf area, panicles length, dry weight and total number of tillers, as the were 26.09 cm2, 17.11 cm, 1477.6 g and 913.9 m-2 respectively, and did not differ from those in the irrigation treatment Q0 which watered with river water (control).Spraying with SA resulting in taller plant, bigger area of flag leaf, longer panicle, higher chlorophyll content, more dry weight and dry root weight and more tillers with values of 62.16 cm, 2580 cm2, 15.82 cm and 19. 71 micrograms -1, 1284.2 gm2, 155.5 gm2 and 861.7 m2, respectively.Data showed a highly correlation of growth properties with rice yield indicating that improving growth characteristics lead to increment in rice productivity.The results showed that there was a significant interaction among studied traits The interaction between irrigation water quality Q1 and spray with SA gave the highest readings of studied characteristics while the irrigation treatment Q3 gave the lowest values in the interference averages of the studied traits.We can conclude that it is possible of irrigation with Q1 water instead of Q0 (river water) as there is no significant difference in all the studied traits including yield, and can expand the production of additional areas using the saline water (Q1) without affecting rice productivity. Salicylic acid has the capability to improve growth characteristic and yield of rice crop when exposed to salt stress.