Department of Plant Sciences, UC Davis
Effect of different levels of B supplementation to diammonium phosphate and time of application on yields, B and P uptake by okra (Abelmoschus esculetus (L.) Moench)
- Author(s): Srivastava, P C
- Singh, M V
- Tyagi, A K
- Pachauri, S P
- et al.
A field experiment was conducted to examine the effect of different levels of B supplementation to diammonium phosphate (DAP) and the time of application on yields, B and P uptake by okra (Abelmoschus esculetus (L.) Moench , cv. Parbhani Kranti) during the rainy season of 2007-08. The treatments including different rates, basal and split applications, and foliar spray were imposed in a randomized block design with three replicates. Boron supplementation of DAP was done through Granubor II (15 % B). Without B application yield and growth of okra was significantly reduced. The highest number of flowers was recorded with 0.30 % B (50% Basal + 25% Top dressing each at 30 and 45 DAE). The highest biomass and fruit (8511 kg fresh wt. ha-1) yields were recorded with application of 0.60% B as 100% basal which also gave the highest total B uptake. However; a comparable and statistically similar fruit yield was obtained with application of 0.75% B as 100% basal or 0.30% B as 50% basal and 25% top dressings each at 30 and 45 DAE. The highest total P uptake was recorded with 0.75% B as 100% basal.