Ammonium-N persistence and root nitrogen content of annual crops and perennial forage grasses following pig manure application
| dc.contributor.author | Lasisi, Ahmed | |
| dc.contributor.examiningcommittee | Tenuta, Mario (Soil Science) Cattani, Doug (Plant Science) | en_US |
| dc.contributor.supervisor | Akinremi, Wole (Soil Science) | en_US |
| dc.date.accessioned | 2016-09-13T21:02:14Z | |
| dc.date.available | 2016-09-13T21:02:14Z | |
| dc.date.issued | 2016 | |
| dc.degree.discipline | Soil Science | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | Studies have shown that significant amounts of nitrate-N is leached beyond root zones of annual crops while small amounts of nitrate-N is leached beyond the root zones of perennial forage grasses. This study investigated short-term ammonium-N persistence and root nitrogen content of annual crop and perennial forage grasses following application of pig manure to a sandy loam soil at Carman, Manitoba. Results showed that ammonium-N in liquid pig manure (LPM) amended treatment peaked four days after manure application (DAM) in perennial cropping system (PCS; 50 - 74 kg ha-1) and annual cropping system (ACS; 18 - 29 kg ha-1) in 2014 and 2015. Ammonium-N persisted up to 7 DAM in LPM amended PCS, but did not persist beyond 4 DAM in LPM amended ACS. Ammonium-N measured in solid pig manure (SPM) amended ACS and PCS was low throughout the sampling days in both years. There was a greater percentage increase in accumulation of nitrate-N at 15 - 30 cm soil depth of LPM and SPM amended ACS than PCS. In both years, dry weight below-ground plant biomass ranged from 5,258 to 9,627 kg ha-1 at 0 - 60 cm depth in PCS while that of ACS ranged from 1,088 to 1,456 kg ha-1. Also, root N content in PCS ranged from 43 to 118 kg N ha-1 in both years while that of ACS ranged from 9 to 20 kg N ha-1. In conclusion, ammonium-N persisted longer in PCS than ACS in the short-term and total plant N was greater in PCS than ACS. Greater total plant N in PCS than ACS was mainly due to its greater root N content rather than above-ground N uptake. The order of magnitude of the difference in root N content (34 to 98 kg N ha-1) between ACS and PCS was sufficient to account for the 20 to 60 kg N/ha of nitrate-N leached in ACS in previous study at the same site. | en_US |
| dc.description.note | October 2016 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/31721 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | Root nitrogen | en_US |
| dc.subject | Ammonium-N | en_US |
| dc.subject | Annual cropping system | en_US |
| dc.subject | Perennial cropping system | en_US |
| dc.subject | Pig manure | en_US |
| dc.subject | Root biomass | en_US |
| dc.title | Ammonium-N persistence and root nitrogen content of annual crops and perennial forage grasses following pig manure application | en_US |
| dc.type | master thesis | en_US |