Effects of Exogenous Amino Acids Application on Nitrogen Accumulation, Yield and Grain Quality in Rice

摘要

The improvement of nitrogen utilization efficiency and the increase of essential amino acid contents in rice is the main purpose of reducing fertilizer and increasing quality in rice production. An experiment was conducted in order to explore the effects of exogenous amino acids on the nitrogen accumulation and the content of essential amino acids in rice: for the 6 treatment groups, 500 mg/L of eachL-leucine-15N and L-lysine-15N sprayed on the rice leaves at the tillering, heading and the ripening stages, and for the control group, only water was sprayed. The results showed that exogenous L-leucine-15N and L – lysine-15N increased the content of nitrogen and essential amino acid in leaves, stems of rice (P< 0.05), and with the increase of spraying times, the content of nitrogen and essential amino acid increased. At the same time, it was found that the 50% of N15 absorbed by leaves is mainly transported to rice grains. In conclusion, the exogenous application of amino acids could significantly increase the accumulation of nitrogen and the content of essential amino acids in grain; improve the yield and quality of rice.