Document Type : Research Paper

Authors

• Ali Jahani
• Vahid Etemad
• Mohammad Doolati
• Nazi Avani

Abstract

Production of native and non native species in the nursurey is considered as one of the raw materials for reforestation in arid regions. Two important factors affecting the seedling production in the nursery are seed density and seed planting depth which extensive studies have been done in this area. Therefore in this research the effect of seed density and planting depth on height, diameter growth and viability of H. persicum have been investigated. Haloxylon plantations of Hossein Abad in Qom province with an area of ​​3180 hectares, is located 30 km south-east of Qom city. Planting depth in four levels of 1, 2, 3 and 4 cm and seed density in five levels of 100, 200, 300, 400 and 500 seeds per 1000 m²were measured. All data were analyzed and the results showed that planting depth of 1 cm had the best results with regard to the basal diameter, height growth and viability percentage so is recommended for reforestration. Planting density of 200 seeds per 1000 m²was also identified suitable for afforestation.
 

Keywords

• planting depth
• Planting density
• Height growth
• viability
• Haloxylon persicum