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

[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 efficient panicles,the grains per panicle,the actual grains and the1 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 is52. 5 kg /hm2 when they are used as the double season and late rice with machine transplanting.