Effect of microbial inhibitors on emission of nitrous oxide from paddy fields
| dc.contributor.advisor | Bharadwaj, Venkatesh | |
| dc.contributor.author | Srivastava, Aditi | |
| dc.date.accessioned | 2019-06-22T05:28:40Z | |
| dc.date.available | 2019-06-22T05:28:40Z | |
| dc.date.issued | 2005-08 | |
| dc.description.abstract | The hazards of increasing concentration of green house gases in the atmosphere are becoming visible day by day. Global warming of the earth is taking place at an unprecedented rate and climates all over the world are fast changing. This unusually higher rate of change has been attributed to nothing but human intervention into the processes of nature. N2O concentration in the atmosphere at present stands at 311 ppbv and is increasing at the rate of 0.25% per year. It has been reported to be contributing almost 5% to the total green house effect. Both unfertilized and fertilized soil have been found to be emitting N2O which is produced during denitrification and nitrification reactions taking place through soil microbes. In the present investigation, an attempt was made to develop techniques for mitigation of N2O evolved from soil by the use of microbial inhibitors without reducing yield of the crop under study (paddy). Effect of nine treatments were observed upon N2O emission as well as upon the plant growth parameters, yield attributes and yield of crop which was kept under submerged condition during the period of study. The treatments were control (no N, with crop), 100% NPK + Nitrapyrin, 100% NPK + Nitrapyrin + green manure (GM), 100% NPK + ECC, 100% NPK + ECC + GM, 100% NPK + Thiourea, 100% NPK + Thiourea + GM, 100% NPK + Dicyandiamide (DCD) and 100% NPK + DCD + GM which produced an average N2O flux rate of 0.21, 0.44, 0.39, 0.01, 0.43, 0.57, 0.38, 0.28 and 0.25 mg m-2 hr-1. Maximum inhibition of N2O emission was observed by 100% NPK+ECC treatment, but this treatment had a more or less adverse effect on plant growth as well as yield. The treatment, 100% NPK + Thiourea + GM had an extremely positive effect on plant growth as well as yield but its inhibitory effect on N2O emission was not found to be substantial in comparison to other treatments. However the treatment, 100% NPK + DCD + GM was found to fit both the roles perfectly. It was able to effectively control N2O emission rate from the soil while also maintaining the yield at a considerably higher level than other treatments. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810109568 | |
| dc.keywords | soil biology, inhibitors, emission, nitrous oxide, rice | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 122 | en_US |
| dc.publisher | G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand) | en_US |
| dc.research.problem | Rice | en_US |
| dc.sub | Agricultural Meteorology | en_US |
| dc.subject | null | en_US |
| dc.theme | Soil Biology | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Effect of microbial inhibitors on emission of nitrous oxide from paddy fields | en_US |
| dc.type | Thesis | en_US |