Effect of Azospirillum lipoferum on Growth, Yield and Nutrient Content of Rice (Oryza sativa cv. BR-11)

抄録

A pot experiment was conducted with and without application of Azospirillum lipoferum inoculant and three levels of nitrogen fertilizers (0 kg/ha, 45 kg/ha, 90 kg/ha) applied to evaluate the effect on growth, yield and nutrient content of rice (Oryza sativa cv. BR-11). Phosphorus, potassium and sulphur were applied at rates of 60 kg/ha, 40 kg/ha and 10 kg/ha, respectively as basal doses. Rice seed and later rice seedlings were inoculated with at least 10⁶ colony forming units of Azospirillum lipoferum for inoculated treatments. Colonization of roots by Azospirillum lipoferum was determined by Enzyme-Linked Immunosorbant Assay (ELISA) test. Inoculation produced significantly higher growth and yield and also increased N, P and K content of rice. The most significant interaction was found when nitrogen was applied at a rate of 45 kg/ha with Azospirillum lipoferum.