Nutrient solutions on potted Anthurium (Anthurium andreanum cv. LentiniRed) in soilless culture

The effect of different nutritional solutions on growth and flowering of potted anthurium (Anthurium andreanum cv. LentiniRed) was comparised in soilless culture in a completely randomized design with four nutrient solutions (treatments) and four replications (each replication five pots), in a research green house in University of Guilan from November '2014 to July '2015. The first (nitrate/total nitrogen, 3.5/3.5) and second (nitrate/total nitrogen, 3/3) nutritional solutions were without ammunium and the third (nitrate/total nitrogen, 4/4.5 and ammonium/total nitrogen, 0.5/4.5) and forth (nitrate/total nitrogen, 3.5/4 and ammonium/total nitrogen, 0.5/4) ones included it. The first and third nutritional solutions included 2.9 and the second and forth ones included 2.4 meqK/l solution. The results showed significant differences among different treatments regarding the number of leaf, flower, flowering time, and the amount of spathʾs anthocyanins, leaf chlorophylls a, b and carotenoids, the concentrations of nitrogen, potassium, magnesium, calcium and iron in leaf. There were no significant difference for plant height, length and width of spath, length, width and area of the leaves and leaf phosphorus concentration. The most number of the leaves and flowers was found in the third nutrient solution. Flowering in third and forth treatments were faster than others. The most concentration of spathʾs anthocyanin was seen in plants related to the second treatment and the most chlorophyll a and carotenoid concentrations were observed in the first and third treatments. Ammonium as a nitrogen source led to a significant decrease in the cationsʼs concentration and an increase in iron concentration in leaf.