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通过多年田间小区试验,研究了不施肥、单施磷肥、单施氮肥和氮磷配施等四种施肥条件下,灌浆结实期冷型小麦和暖型小麦叶片氮含量的差异。结果表明,开花期,在不施肥和氮磷配施条件下,冷型小麦冠层顶三叶的氮百分含量均显著高于暖型小麦;在单施磷肥时,旗叶的氮百分含量也较高;在单施氮肥时,倒三叶、下部叶的氮百分含量显著高于暖型小麦。花后前28天,冷型小麦陕229的冠层顶三叶氮百分含量均显著高于暖型小麦,小偃6号的旗叶在花后前14天、倒二叶在花后前28天、倒三叶在花后前21天也高于暖型小麦。增施氮肥时,冷型小麦下部叶的氮百分含量也明显高于暖型小麦。这为冷、暖型小麦冠层温度的差异提供了氮营养基础。
Through field trials in different years, the differences of nitrogen content between cold-stressed wheat and warm-wheat at grain filling stage were studied under four fertilizers, including no fertilization, single application of phosphate, single application of nitrogen and combination of nitrogen and phosphorus. The results showed that in the flowering stage, the nitrogen content in the top clover tops of cold-type wheat was significantly higher than that in warm-type wheat without fertilizers and nitrogen and phosphorus fertilizers at the flowering stage. When phosphorus was applied alone, Content is also higher; in the single application of nitrogen, inverted clover, the lower part of the nitrogen content was significantly higher than the warm wheat. In the first 28 days after anthesis, the nitrogen content in the canopy top clover was significantly higher than that in the warm wheat. The flag leaf of Xiaoyan 6 was 14 days before anthesis, 28 days, inverted clover 21 days before anthesis than warm wheat. When applying N fertilizer, the nitrogen content of the lower leaves of cold-type wheat was also significantly higher than that of warm wheat. This provided a nitrogen nutrient basis for the differences in canopy temperature between cold and warm wheat.