Study on the effect of different levels of phosphorus and zinc on quality and quantity characteristics of tuberose (Pollianthes tuberosa L.).

In order to study on the effect of different levels of phosphorus and zinc on quality and quantity characteristics of tuberose (Pollianthes tuberosa L.) , field experiments with 4 levels of phosphorus (0,50,100,150 kg.ha-1) from triple super phosphate fertilizer and 3 levels of zinc sulfate (0,20,40 kg.ha-1 ) with 3 replications in 2 years, was carried out in factorial with base of randomized complete block design at 1Χ1 m2 Plot .Results of 2 years showed that P100 Zn20 in 2 years increased significantly Panicle length, shoot diameter, floret length by 21%, 25% and 14% respectivly.For study on the effect of zinc foliar application and comparison whit basically use of it , 6 treatments as: 3 levels of basically (Zn1 Zn2 Zn3 ) use of zinc sulfate (0-20-40 kg.ha-1)and 3 levels of foliar application ( Zn4 Zn5 Zn6) of zinc sulfate(1-2-3 gr.lit-1) was studied at 3 replications as randomized complete block design. Results of 2 years showed that Zn2 (20 kg.ha-1 zinc sulfate) increased significantly flower height, shoot diameter, floret number, flower fresh weight, panicle length , plant phosphorus and corm phosphorus by 8,17,12,17,14,13 and 16 Percent, respectivly. In order to study on the effect of different methods of phosphorus biofertilizer use along with %50 of recommended chemical fertilizer (50 kg.ha-1 phosphorus) in soil and compare it with usual phosphorus fertilizer recommended (100 kg.ha-1 phosphorus) was carried out with 5 treatments and 3 replications in randomized complete block design. Treatments were as:1)Control(P1), 2)Recommended chemical fertilizer as 100 kg.ha-1 phosphorus in soil (P2), 3)Phosphorus biofertilizer seed coating + %50 recommended of chemical phosphorus fertilizer in soil (P3), 4) Phosphorus biofertilizer seed coating + side dressing + %50 recommended of chemical phosphorus fertilizer in soil (P4), 5) Phosphorus biofertilizer side dressing + %50 recommended of chemical phosphorus fertilizer in soil (P5). Results of 2 years showed that P5 (phosphorus biofertilizer side dressing + %50 recommended of chemical phosphorus fertilizer) increased significantly flower height, vase life, flower and corm phosphorus uptake by 4,6,30 and 80 Percent, respectivly. Key words: phosphorus, zinc, triples super phosphate, zinc sulphate, phosphorus biofertilizer, tuberose, yield and growth, zinc foliar application, fertigation.