关键词: 播种期, 生育进程, 产量, 稻米品质, 珍珠糯

Abstract: In order to study the effect of sowing time on the growth process, yield and rice quality of Zhenzhunuo, through the experiment of sowing by stages （April 20, April 27, May 4, May 11, May 18, May 25, June 1） from 2018 to 2019, to determine the best sowing time of the variety, and promote the development of glutinous rice industry in Xinyang area. The results showed that with the delay of sowing time, the stages from seeding to heading shortened, the filling and ripening stage prolonged, the number of leaves decreased and the plant became shorter. Yield first increased and then decreased with the delay of sowing time. At the sowing dates of April 27, May 4 and May 11, the number of effective panicles, spikelets per panicle, setting percentage and 1 000 grain weight were all kept at relatively high levels, with the highest yield on May 4. Brown rice percentage and milled rice percentage showed a trend of decreasing first, then increasing and then decreasing, head rice percentage showed a trend of decreasing first and then increasing. Except for sown on April 27 and May 4, the gel consistency decreased slightly, the other sowing dates were all 100.0 mm, the alkali spreading value increased with the delay of sowing date; amylose content did not change before May 4, and then decreased with the delay of sowing. The amylose content in rice quality was most affected by temperature, and was extremely significant correlated with the daily average temperature during the filling period. In Xinyang area, it is beneficial to increase the yield and improve the quality to arrange the sowing date in a suitable range.

Key words: sowing date, growth process, yield, rice quality, Zhenzhunuo