RESPONSE OF BIO FERTILIZERS IN CONJUNCTION WITH INORGANIC FERTILIZERS IN KHARIF PADDY

Abstract

A field experiment was conducted during kharif season for two consecutive years during 2009-10 and 2010-11 at Instructional Farm, N. M. College of Agriculture, Navsari Agricultural University, Navsari to study the “Response of bio fertilizers in conjunction with inorganic fertilizers in kharif paddy”. The results revealed that the treatment which received 100 per cent RDF (100 - 30 kg NP /ha) + ZnSO4 @ 25 kg /ha+ Azospirillum as seedlings treatment +Azotobactor + PSB + Zn + Potassium solubilizer as soil application recorded significantly higher all growth and yield parameters such as plant height, number of tillers per plant, dry weight of shoot and root, number of panicles per hill, length of panicle, test weight and grain as well as straw yields of rice, while 100 per cent and 75 per cent RDF alone recorded the lowest value. The highest total uptake of N, P, K and Zn and residual available N, P, K and Zn in soil was also found highest in this treatment. Similarly, The highest gross returns, net returns and B:C ratio were recorded with 100 % RDF + ZnSO4 @ 25 kg /ha + Azospirillum as seedlings treatment + Azotobactor + PSB + Zn + Potassium solubilizer, which is found to be promising for increased rice production.