بررسی آبیاری زیرزمینی جهت توسعه فضای سبز مناطق بیابانی

After fixing, the tubes were covered by soil and irrigation of pitchers were carried oUt by under pressure water. B. lOem diameter tnckle tubes irrigation The tUbes WJth 10em diameter and 45cm length were joined together in 30 or .wem depth of soil by cement and irrigation of tues were performed from first channel. C. Drip trickle irrigation The method of drip trickle irrigation was carried out I6mm polyethylene tubes. The automatic and adjustable droppers on the surface soil were used. This method is similar to IOcm diameter triekJe tubes irrigation. The results of variance analysis of data showed that main plot is: significant at five perccm(a=O.05) and sub plot is highly significam at one percent(a=O.OI). Also \\-ith analysis camp anson of height and canopy cover diameter mean of trees showed that JOcm diameter rrickle tubes is significanr at five percenr(a=O.05) arid is better than other methods. In the sub plms(species of trees), Punica, Pinus and Fraxinos in the lOcm diameter trickle tubes and Pistachio in the 15cm diameter trickle tubes method were significam at at five percent(a=O.05) and in comparison with pitcher and drip trickle have better results.