| Relationship of nitrate N concentration in petiole at seedling stage to seed yield and quality at harvest over rapeseed cultivars |
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| DOI：10.7606/j.issn.1000-7601.2010.02.16 |
| Key Words: rapeseed nitrate N concentration agronomic traits yield quality |
| Author Name | Affiliation | | ZHU Feifei | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Zhaohui | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Shengxiu | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Rapeseed is one of the high nitrogen-requiring crops. Effective management of nitrogen is the key for high yield, high efficiency
and high quality rapeseed production. Field experiment was carried out to study nitrate N concentration in petiole at seedling stage and its relationship to seed yield and quality over 18 rapeseed varieties. The obtained results showed that petiole nitrate N concentrations were significantly different over rapeseed varieties at the same N application rate. Petiole nitrate N concentrations at seedling stage could reflect the change of shoot biomass, seed yield, and N uptake in seed and shoot over varieties at harvest, when soil N was sufficiently supplied. However, no significant relationship was observed between petiole nitrate N concentration at seedling stage and primary branches, seeds per pod and 1000 seed weight, and its relationships to plant height, branch height and silique number per plant were different under differ
ent N application rates. Whether the N rate was high or low, no significant relation was showed between petiole nitrate N concentration at seedling stage and seed quality indexes at harvest. |
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