不同播种量对机插晚稻生长发育及经济性状的影响

目的]明确双季机插晚稻适宜的播种量,为水稻机插秧技术推广应用提供参考.方法]以H优518和陆两优996为材料,研究不同播量（22.5、37.5、52.5和60.0 kg/hm2）对机插晚稻秧秧苗素质、分蘖动态、生育期和经济性状的影响.结果]不同播量对机插双季晚稻秧苗素质、分蘖能力、生育期和产量均有不同程度的影响.随着播种量的增加,秧苗素质、茎蘖成穗率、有效穗数、每穗粒数、实粒数和千粒重均呈下降趋势,水稻植株全生育期有所缩短.水稻产量随播种量的增加而增加,各处理间产量差异明显.结论]在该研究中,H优518和陆两优996作双季晚稻机插栽培时,播种量以52.5 kg/hm2为宜.

Effects of Different Seeding Sowing Amount on the Growth and Development and Economic Traits of Late Rice with Machine Trans

Objective] The aim was to confirm on the suitable sowing amount of double season and late rice with machine transplanting,and provide a reference for promotion and use of rice machine-transplanted seedling technology.Method] The effects of different sowing amount （22.5,37.5,52.5,60.0 kg/hm2） on the seedlings quality,the tillering dynamics,the growth period and the economic traits of late rice with machine transplanting H you 518 and Luliangyou 996.Result] Different sowing amount had different level effects on the seedlings quality,the tillering dynamics,the growth period and the yield of double season and late rice with machine transplanting.With the increasing of sowing amount,the seedlings quality,the earbearing tiller percentage,the efiicient panicles,the grains per panicle,the actual grains and the 1 000-kernel weight all showed decreasing trend,and the whole grow period cut down.Rice yield increased with sowing amount rising,and had significant difference among all treatments.Conclusion] In this study,the suitable sowing amount of H you 518 and Luliangyou 996 is 52.5 kg/hm2 when they are used as the double season and late rice with machine transplanting.