关键词: 藜麦, 播期, 产量, 农艺性状, 矿物质元素

Abstract: The two lines of Dianli 1（red quinoa）and Dianli 2（white quinoa）were used to study the effect of different sowing dates（April 1，April 15，May 1，May 15，June 1，June 15，July 1 and July 15）on main agronomic characters and grain mineral element content of quinoa，so as to clarify the best sowing date.The results showed that with the delay of sowing date，the growth periods of red quinoa and white quinoagenerally first decreased and then increased，and reached the shortest under the sowing date of June 15；The plant height of red quinoa and white quinoa first decreased and then increased，finally tended to be stable，reached the lowest under the sowing date of May 15，the highest under the sowing date of April 1，and the plant height of red quinoa was higher than that of white quinoa under all sowing dates；The yield per plant of white quinoa generally first increased and then decreased，while that of red quinoa showed an increase⁃decrease⁃increase⁃decrease trend，both of which were the highest under the sowing date of May1，and the yield per plant of red quinoa was generally higher than that of white quinoa；The 1 000⁃grain weight of white quinoa and red quinoa generally first increased and then decreased，the 1 000⁃grain weight of red quinoa was the highest under the sowing date of April 15，while that of white quinoa was the highest under the sowing date of May 15，and the 1 000⁃grain weight of white quinoa was generally higher than that of red quinoa；The calcium content of grain generally first increased and then decreased，the calcium content of white quinoa grain was the highest under the sowing date of May 1，and that of red quinoa grain was the highest under the sowing date of May 15；The magnesium content of red quinoa grain generally first increased and then decreased，reached the highest under the sowing date of June 15，the magnesium content of white quinoa grain was relatively stable，reached the highest under the sowing date of May 15，and the magnesium content of red quinoa grain was higher than that of white quinoa grain；The ferrum content of white quinoa grain was the highest under the sowing date of April 1，that of red quinoa grain was the highest under the sowing date of April 15；The zinc content of red quinoa grain was the highest under the sowing date of June 15，for white quinoa grain，except the sowing date of May 15，the zinc content of early⁃sowing and early⁃ripening quinoa grain was higher than that of late⁃sowing and late⁃ripening quinoa grain，and the highest was under the sowing date of May 1.To sum up，the yield per plant and the contents of calcium，magnesium and zinc in grain of red quinoa are higher than those of white quinoa；The suitable sowing date can effectively improve the yield and grain mineral element content of quinoa，and the suitable sowing date is from May to June.

Key words: Quinoa, Sowing date, Yield, Agronomic trait, Mineral element