Response of foliar mineral nutrition on bearing of mango cv Amrapali.
Umesh Rajak, Rupa Rani, Ravindra Kumar, Mandal B. K., Prasad K. K.
Author Affiliation: Department of Horticulture, Birsa Agricultural University, Ranchi 834 006, Jharkhand, India.
Environment and Ecology 28 : 1672-1675
Abstract : An experiment on foliar spry of urea (1.0, 1.5, 2.0, 2.5 and 3.0%), zinc sulfate (0.2, 0.4, 0.6, 0.8 and 1%), borax (0.2, 0.4, 0.6, 0.8 and 1%) alone was carried out on ten year old Amrapali mango tree in 2004-05. Two sprays were made i.e. first spray was given before panicle initiation and second just after fruit sets. The date of panicle emergence was recorded first and initial number of fruit setting was found in the favor of treatment 1% borax whereas, among the treatments, both borax 1% and 0.8% spray proved to be the best treatments in reducing fruit drop percentage which recorded only 30.10% and 30.88% respectively while maximum recorded under control (53.72%). Treatment's efficacy with regard to weight and volume of fruit indicated that urea 2.5% acquire more weight (217.74 g) and volume (211.17 cc) as compared to other treatments and control (water spray). Minimum size of stone (6.07×2.73 cm) and least weight (20.08 g) were reported with urea 3.0 and 2.0% spray respectively. While the treatment borax 1% spray remained at par for the same parameter of stone. Data on growth behavior of Amrapali mango both at length and breadth wise at 15 days interval showed a sigmoid curve. Moreover, the ultimate length and breadth of fruit at the time of harvest were 10.58 and 8.52 cm respectively which were found with urea 2.5%.