Effect of nitrogen levels and plant spacing on the growth and flower yield of tuberose (polianthes tuberosa)
2007
Khalaj, Mohammad Ali | Edrisi , Behzad | Hasanzadeh, S. | Yousefbeygi, A. | Azimi, M.H.
Polianthes (Polianthes tuberosa) is one of the most important cut flowers in tropical and sub tropical areas. Our wide country has favorite climate for ornamental plants, specially the polianthes production. This flower whit 145 ha planting area, and 2,200,000 stem production, has forth order in planting area. As regards the polianthes is an important cut flower and its importance for export, efforts for that&rsquos improving quality and quantity is very important. Optimal fertility and determining enough amount for nutrient elements, will improve polianthes production in our country. Follow trough that, the plant spacing and nitrogen necessity as the most important nutrient, studied in field experiment. This experiment carried out in RCBD format whit 3 replication in 2m2 plots. Different level of nitrogen (0, 50, 100, 150, 200, 250 Kg/ha) in ammonium nitrate form, was first factor. Fertilizer applied in 3 splits (at planting +30 and 60 days after planting).second factor was different plant spaces (10*10, 15*15, 20*20, 25*25 cm*cm). Manure fertilizer applied 25 ton/ha per hectare. Other fertilizers applied in plots alike. The results show that plant spacing and different levels of nitrogen affects on some plant characteristics. Data showed by increasing plant spacing, diameter and length of plant shoot increased. Data showed that treatments have different effects on quality and quantity characteristic. So by selecting of 5 best treatments of each characteristic and among them, we choice the best of treatment. N5D4 was the best treatment of all quality and quantity characteristics. Corm number was 89 and Shoot diameter, corm weight, spike length, floret diameter, floret weight and vase life were respectively 8 mm, 398.5 gr., 27.68 cm, 15.36 mm, 18.9 gr., 5.67 days.
Показать больше [+] Меньше [-]