Univrsity Of Tehran Press Water and Irrigation Management 2251-6298 15 3 2025 11 22 Investigation of soil moisture distribution in Sub-irrigation planter (SIP) using different levels of water salinity (A case study of basil) Investigation of soil moisture distribution in Sub-irrigation planter (SIP) using different levels of water salinity (A case study of basil) 641 653 104254 10.22059/jwim.2023.339080.966 FA Hasan Karimi Department of Water Engineering, College of Aburaihan, University of Tehran, Iran. Mahmoud Mashal Department of Water Engineering, College of Aburaihan, University of Tehran, Iran. Seyyed Ebrahim Hashemi Garmdareh Department of Water Engineering, College of Aburaihan, University of Tehran, Iran. Journal Article 2022 02 13 Due to the increasing limitations of water resources, knowing the amount and distribution of moisture in subsurface irrigation is very important in irrigation management. This research was carried out with the aim of investigating sub-irrigation planter (SIP) as one of the suitable methods of irrigation. In this study, two different cultivation media (soil-cocopeat-perlite and cocopeat-perlite) and two depths of the media in the pot (30 and 50 cm) and three water salinity levels of 1.2, 3.5, and 5 dS.m-1 were used. The results showed that there is a significant difference in the wet and dry performance of basil plants between the two irrigation methods at the level of 1 percent and 5 percent. However, the yield values decreased significantly with increasing water salinity. Also, the results showed that the productivity of SIP and surface irrigation were significantly different from each other at the level of 1 percent. The results showed that in the SIP system, the highest salinity is in the surface layers of the soil, while in surface irrigation, the highest salinity is in the bottom layer. The results of investigating the soil moisture in different layers of the substrate showed that the soil moisture in both irrigation methods increases with the increase in the depth of the substrate and at the depth of the substrate, the amount of moisture in SIP is much higher than surface irrigation, and the highest soil moistures were obtained in the deepest layers of both cultivation depths 30 and 50 cm in SIP. Due to the increasing limitations of water resources, knowing the amount and distribution of moisture in subsurface irrigation is very important in irrigation management. This research was carried out with the aim of investigating sub-irrigation planter (SIP) as one of the suitable methods of irrigation. In this study, two different cultivation media (soil-cocopeat-perlite and cocopeat-perlite) and two depths of the media in the pot (30 and 50 cm) and three water salinity levels of 1.2, 3.5, and 5 dS.m-1 were used. The results showed that there is a significant difference in the wet and dry performance of basil plants between the two irrigation methods at the level of 1 percent and 5 percent. However, the yield values decreased significantly with increasing water salinity. Also, the results showed that the productivity of SIP and surface irrigation were significantly different from each other at the level of 1 percent. The results showed that in the SIP system, the highest salinity is in the surface layers of the soil, while in surface irrigation, the highest salinity is in the bottom layer. The results of investigating the soil moisture in different layers of the substrate showed that the soil moisture in both irrigation methods increases with the increase in the depth of the substrate and at the depth of the substrate, the amount of moisture in SIP is much higher than surface irrigation, and the highest soil moistures were obtained in the deepest layers of both cultivation depths 30 and 50 cm in SIP. https://jwim.ut.ac.ir/article_104254_f73955a314d8252f7a40696788e86b89.pdf