National Botanical Research Institute, Lucknow, 226 001
Sixteen foliar sprays at 15 days interval comprising of three levels each of nitrogen through urea (0.80, 1.60 and 2.40 gtn.), phosphorus through orthophos-phoric acid (0.20, 0.40 and 0.60 gm.) and two levels of potassium through potassium citrate (0.64 and 1.28 gm.) per plant in eighteen treatment combinations were applied onto the plant foliage besides control (Distilled water plus wetting agent). The spraying solutions were regulated at pH 5 and teepol (0.1 per cent) was added as wetting agent.
Foliar analysis carried out after 8, 24 and 72 hours of spraying revealed that nutrients applied to plant foliage were absorbed and the rate of absorption was dependant upon the concentration of the nutrient in the spray solution, being higher with higher concentration. Tuberose leaves absorbed most of ihe nitrogen and phosphorus within 24 hours after foliar spray. However, postassium absorption took from 8 to 24 hours respectively at the highest and lowest concentration used. Tnc first and second order interactions paAOjd to be non-significant indicating the uptake of nutrient remained unaffected by the presence of others in the spray solution.
