Effect of nano DAP on growth and yield of vegetable cow pea (yard-long bean)

The experiment was conducted in farmers field at Chinnapettai, Panruti. The experiment was arranged with Randomized block design with 10 treatments. The objective of the study was to evaluate “Effect of Nano DAP on growth and yield of vegetable cow pea (yardlong bean). Among various treatments T₁ + ST with 1 Nano DAP @ 2.5 ml / Kg Seed + FS with Nano DAP @ 2 ml/ litre of water at 30 DAP showed a significant impact on growth and yield parameters. Higher growth parameters viz., number of leaves at 30 DAP (39) and at 45 DAP (67), number of primary branches at 30 DAP (5) and at 45 DAP (7), plant height at 30 DAP (61.25 cm) and at 45 DAP (99.61) were observed in T₁ + ST with Nano 1 DAP @ 2.5 ml / Kg Seed + FS with Nano DAP @ 2 ml/ litre of water at 30 DAP. Also showed a significant impact on yield and its traits viz., pod length (43.40 cm), number of pods per plant (59) and pod yield (3511 kh/ha) in T₁ + ST with Nano DAP @ 2.5 ml / Kg Seed + 1 FS with Nano DAP @ 2 ml/ litre of water at 30 DAP. Nano-fertilizers has superior definite surface area, which marks nutrients more easily absorbed by plants, which significantly improves its fertilizer productivity, when compared with chemical fertilizers. It can be concluded that the nano treated plots shown relatively higher growth and yield compared to commercially treated RDF plot, also can control environment pollution by reducing the usage of conventional fertilizers (DAP).