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研究表明，随着秧龄的延长，盘育秧的秧苗素质越来越不如湿润秧，主要表现为植株矮小，茎细，单株叶面积小，百苗干重轻，分蘖停止早并出现大量夭亡；稀播能改善秧苗素质，减少串根，采用两次化控控制株高，促进分蘖，减少串根有一定效果，抛栽稻和手插稻比较，在经济性状上表现为穗数增加，每穗粒数减少，结实率与千粒重降低；不同秧龄抛栽，早抛的各项经济性状均比晚抛的好，产量比晚抛的高，特别是秧龄超过３０ｄ抛栽，产量减少明显。最后讨论了二晚抛栽稻的育秧技术。
The results showed that with the extension of seedling age, the seedling quality of tray seedling was less and less than that of wetting seedling, which was mainly manifested as short plants, thin stems, small leaf area per plant, Seedling thinning can improve the quality of seedlings, reducing the number of roots, using two chemical control plant height, to promote tillering, reducing the number of roots have some effect, throwing planted rice and hand-inserted rice, the economic traits showed an increase in the number of spikes per Grain number per spike, seed setting rate and grain weight decreased. The economic traits of throwing and early throwing at different seedling ages were better than that of late throwing, and the yield was higher than that of late throwing, especially when the seedling age exceeded 30 days and the yield was obviously reduced. Lastly, we discussed the rice seedling technology of throwing rice twice in the evening.