| 朱飞飞,王朝辉,李生秀.不同油菜品种苗期叶柄硝态氮含量与产量及品质的关系[J].干旱地区农业研究,2010,28(2):80~84 |
| 不同油菜品种苗期叶柄硝态氮含量与产量及品质的关系 |
| 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 |
| 中文关键词: 油菜 硝态氮含量 农学性状 产量 品质 |
| 英文关键词:rapeseed nitrate N concentration agronomic traits yield quality |
| 基金项目:国家自然科学基金项目（30871596和40671107）；国家科技支撑项目（2006BAD25B09）；公益性行业（农业）科研专项（200803030） |
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| 中文摘要: |
| 油菜是高需氮作物，有效的氮素养分管理是其高产、高效、优质生产的关键。采用大田试验方法，研究了不同施氮水平下18个品种油菜苗期叶柄硝态氮含量与其收获期产量和品质的关系。结果表明：同一施氮水平下，苗期不同油菜品种的叶柄硝态氮含量存在明显差异；土壤供氮充足的情况下，苗期叶柄硝态氮含量能反映收获时不同油菜品种间生物量、产量籽粒吸氮量、整株吸氮量变化；苗期油菜叶柄硝态氮含量与株高、分枝节位高度、单株角果数的相关关系受供氮水平的影响；一次有效分枝、每角粒数、千粒重的相关关系与苗期叶柄硝态氮含量无关；无论施氮水平如何，苗期油菜叶柄的硝态氮含量与籽粒各项品质指标均无显著相关。 |
| 英文摘要: |
| 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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