Effect of Azospirillum at different levels of nitrogen on yield of rainfed transplanted rice (Oryza sativa) , . K. MANJAPPA , , . ,= , , . . 2, . . Agricultural Research Station (Paddy), University of Agricultural Sciences, Sirsi, Karnataka 581 401
DOI:
https://doi.org/10.59797/ija.v46i4.3323Keywords:
Rainfed transplanted rice, Azospirillum, Nitrogen levelsAbstract
Received :January 2001 An experiment was conducted at Agricultural Research Station (Paddy), Sirsi, during the rainy seasons of 1997 and 1998, to know the efficacy of Azospirillum in conjunction with inorganic nitrogen on yield of rice (Oryza sativa L.). The experiment consisted of 8 treatment combinations of 2 levels of Azospirillum (no Azospirillum and Azospirillum) and 4 levels of nitrogen (0,50,75 and 100% recommended dose of nitrogen). On an average over 2 years, the grain yield of rice increased significantly with Azospirillum treatment (4,.957 kg/ha) compared to no Azospirillum treatment (4,394 kglha). Similarly, the grain yield of rice increased significantly with increased levels of nitrogen. The grain yield recorded i with Azospirillum 75% recommended dose of N (5,330 kg/ha) was significantly higher over that of no Azospirillum 100% recommended dose of N (5,146 kg/ha) but was on a par with that of Azospirillum 100% recommended dose of N (5,460 kg/ha).References
Balasubsramanian, A. and Kumar, K. 1990. Influ-ence of Azospirillum biofertilizer on rice crop.
(In) Biological Nitrogen Fixation Associated with Rice, PP. 267-275. Dutta, S. K. J. and Sloger, C. (Eds). Oxford & IBH Publishing Pvt. Ltd, New Delhi.
bubey, S.K,, Shamra and Vishw*mma, S.K. ''1
Integrated nutrient management for sus- tainable productivity of important cropping systems in Madhya Pradesh. Indian Jouml of Agronomy 42 (1) : 13-17:
G0palaswamy, G.7 Anthoni Raj, S. and Rangma- than, T.B. 1997. Biofertilizer application strat-
egy to .cq (&yza sativa). Journal oj
A~~~~~~~ 42(1) : 68-73.
~o~alaswam~,
G. and Vidhyasekaran, P. 1987. Efficacy of Azospirillum brasilense in increas- ing rice yields. International Rice Research Newsletter 12(1) :34.
Balasubsramanian, A. and Kumar, K. 1990. Influ-ence of Azospirillum biofertilizer on rice crop.
(In) Biological Nitrogen Fixation Associated with Rice, PP. 267-275. Dutta, S. K. J. and Sloger, C. (Eds). Oxford & IBH Publishing Pvt. Ltd, New Delhi.
bubey, S.K,, Shamra and Vishw*mma, S.K. ''1
Integrated nutrient management for sus- tainable productivity of important cropping systems in Madhya Pradesh. Indian Jouml of Agronomy 42 (1) : 13-17:
G0palaswamy, G.7 Anthoni Raj, S. and Rangma- than, T.B. 1997. Biofertilizer application strat-
egy to .cq (&yza sativa). Journal oj
A~~~~~~~ 42(1) : 68-73.
~o~alaswam~,
G. and Vidhyasekaran, P. 1987. Efficacy of Azospirillum brasilense in increas- ing rice yields. International Rice Research Newsletter 12(1) :34.
