Ismail, Muhammad Khairulanam (2020) Quantifying ammonia volatilization in flooded rice system. [Project Paper] (Submitted)
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Abstract
It has widely been observed that the effect on rice productivity depends largely on soil N availabilities. However, the responses of Ammonia volatilization from flooded paddy rice system that is an important pathway of N loss and thus affecting fertilizer N availability. In this paper, we first report the measurement on Ammonia volatilization from rice paddy after applied with urea by using Ogawa passive sampler (OPS). To determining the Ammonia volatilization, a study was held in the soil engineering and rehabilitation laboratory, UPM by using microcosm to create two condition which without paddy and with paddy. The Ogawa passive sampler (Ogawa USA, Pompano Beach, Florida) is a useful tool for monitoring atmospheric Ammonia (NH3(g)) concentrations. OPS was deployed in three different height for each microcosm which 10 cm from soil, 40 cm from soil and surrounding laboratory which 150 cm from soil with a certain interval time. Some of the parameter like pH floodwater and wind speed are also be determined by using specified sensor to discussed weather this parameter can promote Ammonia volatilization. The samplers and then determined using Spectrophotometer DR200 to quantify Ammonia concentration from the samplers deployed. From this study, the total ammonia concentration is 5.2 PPM for microcosm without paddy and 2.32 for microcosm with paddy. And average value of pH floodwater, surrounding temperature, Ammonia concentration in flood water, and wind speed are maximum at 7.8 pH, 29.4°∁, 5 PPM and 0.12 ms respectively throughout total of 92 hours after applied urea.
| Item Type: | Project Paper |
|---|---|
| Faculty: | Faculty of Engineering |
| Depositing User: | Ms Siti Mariam Giman |
| Date Deposited: | 21 Nov 2022 08:01 |
| Last Modified: | 21 Nov 2022 08:01 |
| URI: | http://psaspb.upm.edu.my/id/eprint/609 |
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