Effect of sowing date on forage rape seed quality
New Zealand produced forage rape (Brassica napus L.) seed lots usually have a germination of ≥ 90% but can differ markedly in seed vigour. Abiotic stress during seed development can reduce seed vigour, and changing sowing date has been proposed as a means of reducing the impact of this stress. Seeds...
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ftlincolnuniv:oai:researcharchive.lincoln.ac.nz:10182/10461 2023-05-15T16:28:21+02:00 Effect of sowing date on forage rape seed quality Rashid, Muhammad Hampton, John G. Trethewey, Jason Rolston, M. P. 55-64 (10) https://hdl.handle.net/10182/10461 en eng Agronomy Society of New Zealand The original publication is available from - Agronomy Society of New Zealand - https://www.agronomysociety.org.nz/2017-journal-papers.html Agronomy New Zealand https://researcharchive.lincoln.ac.nz/bitstream/10182/10461/5/Hampton_EffectOfSowing_2017.pdf.jpg Rashid, M., Hampton, J.G., Trethewey, J.A.K., & Rolston, M.P. (2017). Effect of sowing date on forage rape seed quality. Agronomy New Zealand, 47, 55-64. 0110-6589 https://hdl.handle.net/10182/10461 © The Authors. abiotic stress germination growing degree days harvest maturity physiological maturity seed development seed vigour thousand seed weight 070302 Agronomy Journal Article ftlincolnuniv 2022-03-29T15:12:04Z New Zealand produced forage rape (Brassica napus L.) seed lots usually have a germination of ≥ 90% but can differ markedly in seed vigour. Abiotic stress during seed development can reduce seed vigour, and changing sowing date has been proposed as a means of reducing the impact of this stress. Seeds of forage rape cv. Greenland were sown on 25 March and 11 April 2011 at Lincoln, Canterbury. Plant reproductive growth was monitored and a seed development study conducted. Seeds were hand harvested at 50% seed moisture content (SMC), 25% SMC and 14% SMC and their germination, seed vigour and thousand seed weight (TSW) determined. Seeds reached physiological maturity (PM) at 48% SMC after the plants had accumulated a total of 1279 (March) and 1229 (April) growing degree days (Tbase = 5°C). Seed development was similar for both sowing dates. Sowing date had no effect on germination, but both seed vigour and TSW were lower for the March than the April sowing. In the three weeks between PM and harvest maturity (14% SMC), seed quality was reduced significantly for both sowing dates. Because climate data were obtained from a weather station one kilometre from the trial site, it was not possible to directly relate seed quality differences between sowing dates to abiotic stress during seed development, and this requires a further study. For this late flowering forage rape cultivar, Greenland, an April rather than a March sowing is likely to produce a greater yield of higher quality seed. Article in Journal/Newspaper Greenland Lincoln University (New Zealand): Lincoln U Research Archive Greenland New Zealand |
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Lincoln University (New Zealand): Lincoln U Research Archive |
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ftlincolnuniv |
language |
English |
topic |
abiotic stress germination growing degree days harvest maturity physiological maturity seed development seed vigour thousand seed weight 070302 Agronomy |
spellingShingle |
abiotic stress germination growing degree days harvest maturity physiological maturity seed development seed vigour thousand seed weight 070302 Agronomy Rashid, Muhammad Hampton, John G. Trethewey, Jason Rolston, M. P. Effect of sowing date on forage rape seed quality |
topic_facet |
abiotic stress germination growing degree days harvest maturity physiological maturity seed development seed vigour thousand seed weight 070302 Agronomy |
description |
New Zealand produced forage rape (Brassica napus L.) seed lots usually have a germination of ≥ 90% but can differ markedly in seed vigour. Abiotic stress during seed development can reduce seed vigour, and changing sowing date has been proposed as a means of reducing the impact of this stress. Seeds of forage rape cv. Greenland were sown on 25 March and 11 April 2011 at Lincoln, Canterbury. Plant reproductive growth was monitored and a seed development study conducted. Seeds were hand harvested at 50% seed moisture content (SMC), 25% SMC and 14% SMC and their germination, seed vigour and thousand seed weight (TSW) determined. Seeds reached physiological maturity (PM) at 48% SMC after the plants had accumulated a total of 1279 (March) and 1229 (April) growing degree days (Tbase = 5°C). Seed development was similar for both sowing dates. Sowing date had no effect on germination, but both seed vigour and TSW were lower for the March than the April sowing. In the three weeks between PM and harvest maturity (14% SMC), seed quality was reduced significantly for both sowing dates. Because climate data were obtained from a weather station one kilometre from the trial site, it was not possible to directly relate seed quality differences between sowing dates to abiotic stress during seed development, and this requires a further study. For this late flowering forage rape cultivar, Greenland, an April rather than a March sowing is likely to produce a greater yield of higher quality seed. |
format |
Article in Journal/Newspaper |
author |
Rashid, Muhammad Hampton, John G. Trethewey, Jason Rolston, M. P. |
author_facet |
Rashid, Muhammad Hampton, John G. Trethewey, Jason Rolston, M. P. |
author_sort |
Rashid, Muhammad |
title |
Effect of sowing date on forage rape seed quality |
title_short |
Effect of sowing date on forage rape seed quality |
title_full |
Effect of sowing date on forage rape seed quality |
title_fullStr |
Effect of sowing date on forage rape seed quality |
title_full_unstemmed |
Effect of sowing date on forage rape seed quality |
title_sort |
effect of sowing date on forage rape seed quality |
publisher |
Agronomy Society of New Zealand |
url |
https://hdl.handle.net/10182/10461 |
geographic |
Greenland New Zealand |
geographic_facet |
Greenland New Zealand |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
The original publication is available from - Agronomy Society of New Zealand - https://www.agronomysociety.org.nz/2017-journal-papers.html Agronomy New Zealand https://researcharchive.lincoln.ac.nz/bitstream/10182/10461/5/Hampton_EffectOfSowing_2017.pdf.jpg Rashid, M., Hampton, J.G., Trethewey, J.A.K., & Rolston, M.P. (2017). Effect of sowing date on forage rape seed quality. Agronomy New Zealand, 47, 55-64. 0110-6589 https://hdl.handle.net/10182/10461 |
op_rights |
© The Authors. |
_version_ |
1766017991845085184 |