Influence of plant growth regulator IBA on vegetative propagation of Juniperus excelsa

Juniper is a beautiful evergreen conifer which is so useful for afforestation in arid and semi-arid areas. On one hand, propagation from seed of Juniperus excelsa is difficult, on the other hand, its natural regeneration for the natural ecosystem disturbance caused by destruction, is limited. Therefore, under the controlled greenhouse condition (MIST), it was proceeded to propagate the stem cuttings coco peat planting beds by plant growth regulators (IBA) at zero density and 3000, 4000 and 6000ppm. This experiment was conducted by a completely randomized block design with 4 blocks and 56 cuttings per block for each treatment. Results showed that there is a significant difference (p<0.05) between treatment 3 (IBA= 400 ppm) and 1 (IBA= 0 ppm). However, with increasing IBA amount from 4000 to 6000 ppm, the number of rooted cuttings is decreased.Therefore, the best treatment was coco peat planting bed using 4000 ppm IBA in April.