促芽肥不同施用时期对中稻再生季生产的影响

以中稻品种深两优876、准两优199为材料,于2014~2016年连续3 a开展不同时期(头季中稻收割前6 d、收割当天、收割后5 d)施用促芽肥(150 kg/hm~2尿素)的田间试验,通过比较中稻再生季的生育期、穗粒结构及产量的差异来确定再生季水稻促芽肥的最佳施用时期。结果表明:两个品种在头季中稻收割前6 d施促芽肥的再生季产量最高,且植株生长期适中,有效穗多,穗粒结构合理。

Effects of Different Application Period of Bud Fertilizer on Growth of Semilate Ratoon Rice

Using hybrid mid-season rice Shenliangyou 876 and Zhunliangyou 199 for the test materials, 150 kg/hm2 urea was applied on different application period of first season, including 6 days before harvest, the harvest of rice harvest day, and 5 days after bud from 2014 to 2016, the optimal application period of rice sprout fertilizer was determined by comparing the growth period, grain structure and yield of rice regeneration season. The results showed that the yield of both rice varieties reached the highest when applied bud fertilizer about 6 days before harvest in the first season, for moderate growth period, more panicle number, and reasonable spike grain structure.