湿润育秧不同移栽秧龄对滇杂35秧苗素质及主要农艺性状的影响

[目的]研究湿润育秧过程中不同移栽秧龄对滇杂35(Oryza sativa L.)秧苗素质及其主要农艺性状的影响,探索滇杂35移栽的最佳秧龄,为其合理栽培及其获得更高的生产效益提供理论依据。[方法]研究湿润育秧不同移栽秧龄(30、35、40、45、50、55、60 d)对滇杂35的秧苗素质及部分农艺性状的影响。[结果]随着秧龄的增加,滇杂35苗期白根减少,大田期分蘖增长渐缓,抽穗期提早,生育期缩短。适当的秧龄移栽有利于滇杂35的生长发育,以40～45 d的移栽秧龄为最佳,其分蘖能力最强,生育期适中,结实率较高,且无早穗现象,能够获得高产。秧龄过小(30～35 d)或过大(50～60 d)都不利于生长发育,不利于产量提高。[结论]在昆明,湿润育秧移栽时,滇杂35的最佳秧龄为40～45 d。

Effects of Different Transplanting Seedling Ages on Seedlings Quality of Dianza 35(Oryza sativa L.) and Its Main Agronomic Traits during Wet-raised Seedling

[Objective] The purpose was to study the effects of different transplanting seedling ages on seedlings quality of Dianza 35 and its main agronomic traits during wet-raised seedling,and discuss its best transplanting seedling age and provide a theoretical basis for its reasonable cultivation and obtaining higher income.[Method] The influences of different seeding ages(30,35,40,45,50,55,60 d) on Dianza 35’s seedlings quality and partial agronomic traits during wet-raised seedling were studied.[Result] With transplanting seedling age increase,white roots of Dianza 35 decreased,the growth of tiller slowed down,heading stage advanced,and growth period shortened.Appropriate seeding age help to the growth and development of Dianza 35 and the optimal transplanting seedling age was 40-45 days.Under this condition,Dianza 35’s tiller ability was the strongest with the medium bearing period,high ripening rate and high yield without premature heading.Too young(30-35days)or too old(50-60 days) were both going against the growth and development of seeding.[Conclusion] The best transplanting seedling age of Dianza 35 is 40-45 days during wet-raised seedling in Kunming.