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作 者 ：邹朝晖, 张志元, 邓钢桥, 彭选明, 唐建洲, 谢洪科, 李先, 张乐平, 李静

期 刊 ：核农学报 2016年 30卷 7期 页码：1435-1439

关键词：水稻；L-亮氨酸-15N；干重；含氮量；

Keywords:rice, L-leucine-15N, dry weight, nitrogen content,

摘 要 ：为了探索外源氨基酸对水稻干重及含氮量的影响,本试验采用500mg·L^-1 L-亮氨酸-¹⁵N在分蘖期、抽穗期、蜡熟期喷施水稻叶面,并以清水为对照。结果表明,喷施外源L-亮氨酸-¹⁵N处理组中的叶、茎鞘、稻谷的干重及含氮量均显著高于对照组,分蘖期、抽穗期、蜡熟期3个时期喷施L-亮氨酸-¹⁵N比分蘖期、抽穗期2个时期喷施其干重及含氮量高,分蘖期、抽穗期2个时期喷施L-亮氨酸-¹⁵N比只喷施分蘖期其干重及含氮量高,叶面吸收¹⁵N约50%运输到水稻的籽粒。本研究对提高稻米产量及品质具有重要的实际生产意义。

Abstract:In order to explore effects of exogenous amino acids on dry weight and nitrogen content of rice, this test sprayed rice leaf with 500mg·L^-1 L-leucine-¹⁵N at tillering stage, heading stage and maturity stage, and with clear water as the control. Results showed that the dry weight of leaf and stem and grain, and nitrogen content of the treatment group were higher than that of the control group when sprayed with exogenous L-leucine-¹⁵N with significant difference and there were different degrees of increase when sprayed at different stages. The study showed that the dry weight and nitrogen content of rice of the treatment group were higher than that of the control group when sprayed at all three stages rather than at the first two stages. And the study showed that the dry weight and nitrogen content of rice of the treatment group were higher than that of the control group when sprayed at tillering stage, heading stage rather than only at tillering stage, about 50% of foliar uptake of nitrogen-¹⁵ is transported to the grain of rice.This research has great significance in improving yield and quality of rice in practice.

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