- Title
- Biochar-induced concomitant decrease in ammonia volatilization and increase in nitrogen use efficiency by wheat
- Creator
- Mandal, Sanchita; Thangarajan, Ramya; Bolan, Nanthi S.; Sarkar, Binoy; Khan, Naser; Ok, Yong Sik; Naidu, Ravi
- Relation
- Chemosphere Vol. 142, p. 120-127
- Publisher Link
- http://dx.doi.org/10.1016/j.chemosphere.2015.04.086
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2016
- Description
- Ammonia (NH₃) volatilization is a major nitrogen (N) loss from the soil, especially under tropical conditions, NH₃ volatilization results in low N use efficiency by crops. Incubation experiments were conducted using five soils (pH 5.5–9.0), three N sources such as, urea, di-ammonium phosphate (DAP), and poultry manure (PM) and two biochars such as, poultry litter biochar (PL-BC) and macadamia nut shell biochar (MS-BC). Ammonia volatilization was higher at soil with higher pH (pH exceeding 8) due to the increased hydroxyl ions. Among the N sources, urea recorded the highest NH₃ volatilization (151.6 mg kg−1 soil) followed by PM (124.2 mg kg−1 soil) and DAP (99 mg kg−1 soil). Ammonia volatilization was reduced by approximately 70% with PL-BC and MS-BC. The decreased NH3 volatilization with biochars is attributed to multiple mechanisms such as NH₃ adsorption/immobilization, and nitrification. Moreover, biochar increased wheat dry weight and N uptake as high as by 24.24% and 76.11%, respectively. This study unravels the immense potential of biochar in decreasing N volatilization from soils and simultaneously improving use efficiency by wheat.
- Subject
- ammonia volatilization; biochar; nitrogen dynamics; PH; urea; wheat
- Identifier
- http://hdl.handle.net/1959.13/1319515
- Identifier
- uon:23888
- Identifier
- ISSN:0045-6535
- Language
- eng
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