Effect of Nano Phosphorus Fertilizers on Growth and Yield of Maize (Zea mays L.) in Central Dry Zone of Karnataka

摘要

A field experiment was conducted during Kharif2021 in fanner’s field at Halavarthy village of Davanagere district, Karnataka, which comes under Central Dry Zone of Karnataka (Zone 4), using RCBD with eleven treatments and three replications to evaluate the impact of three different nano phosphorus fertilizers on the productivity of maize. Treatments included Tt: Absolute control, T_2: 100 per cent recommended package of practice (RPP), T_3 to T_5: 75 per cent RDP (75% recommended dose of P) throughSSP + 5 per cent RDP through NP1 (hydroxyapatite nano fertilizer), NP2 (nano rock phosphate) and NP3 (hydroxyapatite nanoparticles coated with CMC), T_6'to T_8: 75 percent RDP + 1 per cent RDP through foliar spray of NP1,NP2 andNP3, T_9 to T_(11): 75 percent RDP + 5 per cent RDP through soil application of NP1, NP2 and NP3 and 1 per cent RDP through foliar spray of NP1, NP2 and NP3, respectively. Results revealed that application of phosphorus in nano form had significant effect on growth and yield ofmaize. Treatment with 75 per cent RDP through SSP + 5 per cent RDP through soil application of NP1 + 1 per cent RDP through foliar spray of NP1 recorded significantly higher plant height, number of leaves plant4, chlorophyll content, dry matter accumulation, cob length (19.01 cm), number of rows cob~4 (16.27), number of kernels row1 (35.27), test weight (33.20 g), stover yield (82.23 q ha4) and kernel yield (73.59 q ha4) over absolute control and were better when compared to T_2( 100 % RPP).