BIO-N inoculation:
| creativework.keywords | BIO-N; Inoculation; Nitrogen-fixing bacteria | |
| dc.contributor.author | Abalos, Emilia | |
| dc.date.accessioned | 2026-10-30T07:08:17Z | |
| dc.date.available | 2026-10-30T07:08:17Z | |
| dc.date.issued | 2005-08 | |
| dc.description | Abstract only | |
| dc.description.abstract | Inorganic nitrogen fertilizers are the most utilized but expensive and inefficient agricultural input. Only 47% of the inorganic N applied to rice is utilized by the plant (IRR, 1983). Slow release fertilizers although effective, were not popularly used because of its high cost. Azolla had been extensively explored but its use was not sustained possibly because of the difficulty in culturing azolla in ponds of water prior to its utilization. The air has 78% nitrogen (N2) which could be fixed by nitrogen-fixing bacteria into usable form of N, (NH4+) and (NO3-) ions. Nitrogen fixation by nitrogen-fixing bacteria for nonlegumes such as rice and corn could be harnessed. Nonsymbiotic nitrogen fixing bacteria (Azospirillium sp.) were isolated from "talahib" (Saccharum spontanium, LINN) from "Pinatubo lahar" area. Inoculants were produced by the BIOTECH Institute of UPLB, Laguna from the isolates and were named BIO-N. BIO-N inoculants were tested on rice, corn and some vegetable crops at farmers' field at different locations. The effect of BIO-N on growth, yield and benefit-cost ratio were compared with farmers' practice and inorganic fertilization. Results showed that BIO-N inoculation could supply 1/3 to 1/2 of the nitrogen requirement of rice, corn. BIO-N inoculation plus 1/2 of the recommended rate and BIO-N plus full recommended rates using chemical fertilizer gave a 43.42% to 80.79% increase in yield of Hybrid corn over the control. Similar trend is observed in rice. Comparison on the peso inputs/kg yield showed that the use of BIO-N alone requires only 0.016 peso input as compared to the 0.443 peso input/kg yield. A benefit-cost ratio (BCR) of 3.67 can be realized with BIO-N inoculation plus 1/2 recommended rate as compared to 2.79 from full inorganic fertilization. However, inconsistent results were observed from different locations. BIO-N inoculation could not totally substitute the inorganic nitrogen requirement but can supplement the requirement of crops at minimal cost without harming the environment. | |
| dc.identifier.citation | Abalos, E. (2005). BIO-N inoculation: a sustainable and natural nutrition source for rice and corn. Journal of Agriculture and Rural Development in the Tropics and Subtropics, Supplement, (83), 114-119. https://www.scopus.com/pages/publications/33947393165?origin=resultslist | |
| dc.identifier.doi | https://www.scopus.com/pages/publications/33947393165?origin=resultslist | |
| dc.identifier.issn | 16138422 | |
| dc.identifier.uri | https://lakasa.dmmmsu.edu.ph/handle/123456789/2867 | |
| dc.language.iso | en | |
| dc.publisher | Journal of Agriculture and Rural Development in the Tropics and Subtropics, Supplement | |
| dc.sdg | SDG 12 | |
| dc.sdg | SDG 2 | |
| dc.subject.lcsh | Biofertilizers | |
| dc.subject.lcsh | Corn--Fertilizers | |
| dc.subject.lcsh | Rice--Fertilizers | |
| dc.title | BIO-N inoculation: | |
| dc.title.alternative | A sustainable and natural nutrition source for rice and corn | |
| dc.type | Conference paper | |
| local.subject.scientificname | Azolla | |
| local.subject.scientificname | Saccharum | |
| local.subject.scientificname | Zea mays | |
| oaire.citation.issue | 83 |