dc.identifier.uri | http://dx.doi.org/10.15488/719 | |
dc.identifier.uri | http://www.repo.uni-hannover.de/handle/123456789/743 | |
dc.contributor.author | Koeslin-Findeklee, Fabian | |
dc.contributor.author | Horst, Walter Johannes | |
dc.date.accessioned | 2016-11-24T12:51:16Z | |
dc.date.available | 2016-11-24T12:51:16Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | Koeslin-Findeklee, Fabian; Horst, Walter J.: Contribution of nitrogen uptake and retranslocation during reproductive growth to the nitrogen efficiency of winter oilseed-rape cultivars (Brassica napus L.) differing in leaf senescence. In: Agronomy 6 (2016), Nr. 1, 6010001. DOI: http://dx.doi.org/10.3390/agronomy6010001 | |
dc.description.abstract | Genotypic variation in N efficiency defined as high grain yield under limited nitrogen (N) supply of winter oilseed-rape line-cultivars has been predominantly attributed to N uptake efficiency (NUPT) through maintained N uptake during reproductive growth related to functional stay-green. For investigating the role of stay-green, N retranslocation and N uptake during the reproductive phase for grain yield formation, two line cultivars differing in N starvation-induced leaf senescence were grown in a field experiment without mineral N (N0) and with 160 kg N·ha−1 (N160). Through frequent harvests from full flowering until maturity N uptake, N utilization and apparent N remobilization from vegetative plant parts to the pods could be calculated. NUPT proved being more important than N utilization efficiency (NUE) for grain yield formation under N-limiting (N0) conditions. For cultivar differences in N efficiency, particularly N uptake during flowering (NUPT) and biomass allocation efficiency (HI) to the grains, were decisive. Both crop traits were related to delayed senescence of the older leaves. Remobilization of N particularly from stems and leaves was more important for pod N accumulation than N uptake after full flowering. Pod walls (high N concentrations) and stems (high biomass) mainly contributed to the crop-residue N at maturity. Decreasing the crop-inherent high N budget surplus of winter oilseed-rape requires increasing the low N remobilization efficiency particularly of pod-wall N to the grains. Addressing this conclusion, multi-year and -location field experiments with an extended range of cultivars including hybrids are desirable. | eng |
dc.description.sponsorship | DFG/FOR/948 | |
dc.description.sponsorship | Landwirtschaftskammer Niedersachsen | |
dc.language.iso | eng | |
dc.publisher | Basel : MDPI AG | |
dc.relation.ispartofseries | Agronomy 6 (2016), Nr. 1 | |
dc.rights | CC BY-NC-SA 4.0 Unported | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-sa/4.0/ | |
dc.subject | Brassica napus | eng |
dc.subject | Genotypic differences | eng |
dc.subject | Line cultivars | eng |
dc.subject | Nitrogen efficiency | eng |
dc.subject | Nitrogen retranslocation | eng |
dc.subject | Nitrogen uptake | eng |
dc.subject | Nitrogen utilization | eng |
dc.subject | Stay-green | eng |
dc.subject.ddc | 630 | Landwirtschaft, Veterinärmedizin | ger |
dc.title | Contribution of nitrogen uptake and retranslocation during reproductive growth to the nitrogen efficiency of winter oilseed-rape cultivars (Brassica napus L.) differing in leaf senescence | eng |
dc.type | Article | |
dc.type | Text | |
dc.relation.issn | 2073-4395 | |
dc.relation.doi | http://dx.doi.org/10.3390/agronomy6010001 | |
dc.bibliographicCitation.issue | 1 | |
dc.bibliographicCitation.volume | 6 | |
dc.bibliographicCitation.firstPage | 6010001 | |
dc.description.version | publishedVersion | |
tib.accessRights | frei zug�nglich |