Hemp Seed Yield Responses to Nitrogen Fertility Rates
| dc.contributor.author | Podder, Swarup | en |
| dc.contributor.author | Shafian, Sanaz | en |
| dc.contributor.author | Thomason, Wade E. | en |
| dc.contributor.author | Wilson, T. Bain | en |
| dc.contributor.author | Fike, John H. | en |
| dc.date.accessioned | 2024-06-26T13:37:04Z | en |
| dc.date.available | 2024-06-26T13:37:04Z | en |
| dc.date.issued | 2024-04-11 | en |
| dc.date.updated | 2024-06-26T13:22:22Z | en |
| dc.description.abstract | Industrial hemp (<i>Cannabis sativa</i> L.) holds promise as a crop for more sustainable supply chains given its potential as a source of high-strength fibers, adsorbents, and nutrient-dense feedstuffs. Developing nutrient management guidelines for hemp will be an important part of optimizing the crop’s sustainability attributes. This study measured hemp seed yield in response to N fertilization rate (0, 60, 120, 180, and 240 kg N ha<sup>−1</sup>). Treatments were tested with four hemp cultivars (‘Joey’ and ‘Grandi’ in 2020, 2021, and 2022 and ‘NWG 2463’ and ‘NWG 4113’ in 2023) in Virginia. Nitrogen input influenced (<i>p</i> ≤ 0.0177) seed yield in all four experimental years, although the pattern of response varied substantially. In 2020, following delayed seeding, hemp showed a weak quadratic (<i>p</i> = 0.0113) response to N inputs, with peak yield (1640 kg ha<sup>−1</sup>) occurring with 120 kg N ha<sup>−1</sup>. In 2021, hemp displayed a strong linear (<i>p</i> < 0.0001) response to N inputs, with the highest seed yield (2510 kg ha<sup>−1</sup>) at 240 kg N ha<sup>−1</sup>. In 2022, a season characterized by low precipitation and high weed pressure, a weak, linear (<i>p</i> = 0.0111) response to the N rate was observed. The greatest seed yield (380 kg ha<sup>−1</sup>) was again observed with 240 kg N ha<sup>−1</sup>. In 2023, weed pressure remained an issue, but the response to N was strong and linear (<i>p</i> < 0.0001), with the greatest seed yield (831 kg ha<sup>−1</sup>) again measured at 240 kg N ha<sup>−1</sup>. These findings indicate hemp can be quite responsive to N inputs but that the magnitude of response is sensitive to other factors such as available soil moisture, weed pressure, and growing period. | en |
| dc.description.version | Published version | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | Podder, S.; Shafian, S.; Thomason, W.E.; Wilson, T.B.; Fike, J.H. Hemp Seed Yield Responses to Nitrogen Fertility Rates. Crops 2024, 4, 145-155. | en |
| dc.identifier.doi | https://doi.org/10.3390/crops4020011 | en |
| dc.identifier.uri | https://hdl.handle.net/10919/119534 | en |
| dc.language.iso | en | en |
| dc.publisher | MDPI | en |
| dc.rights | Creative Commons Attribution 4.0 International | en |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en |
| dc.title | Hemp Seed Yield Responses to Nitrogen Fertility Rates | en |
| dc.title.serial | Crops | en |
| dc.type | Article - Refereed | en |
| dc.type.dcmitype | Text | en |