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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kinugasa, Toshihiko Sato, Takashi Oikawa, Shimpei Hirose, Tadaki |
| Copyright Year | 2011 |
| Abstract | Nitrogen (N) has been suggested as a determinant of seed production especially in species with high seed N content. Assuming that seed yield was determined as the balance between N demand and supply for seed production, we studied the effect of N fertilization after flowering on soybean (Glycine max L. Merr.) yield. Seed N concentration was nearly constant irrespective of N fertilization, indicating that seed production was proportional to the amount of N available for seed growth. N demand for seed production was analyzed as the product of seed number, the rate of N filling in individual seeds, and the length of the reproductive period. N fertilization increased seed number and the reproductive period, but did not influence the N filling rate. Seed number was positively correlated with dry mass productivity after flowering. Three N sources were distinguished: mineral N uptake, symbiotic N2 fixation and N remobilization from vegetative body. N fertilization increased N uptake and N remobilization, but lowered N2 fixation. We concluded that N availability in the reproductive period determined seed yield directly through increasing N supply for seed growth and indirectly through increasing seed N demand with enhanced plant dry mass productivity. |
| Starting Page | 275 |
| Ending Page | 281 |
| Page Count | 7 |
| File Format | |
| ISSN | 09189440 |
| Journal | Journal of Plant Research |
| Volume Number | 125 |
| Issue Number | 2 |
| e-ISSN | 16180860 |
| Language | English |
| Publisher | Springer Japan |
| Publisher Date | 2011-06-14 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Glycine max N demand and supply N filling rate N2 fixation Remobilization Seed yield Plant Ecology Plant Biochemistry Plant Physiology Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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