壮芽灵浸种对德香4103直播群体结构和产量的影响

大田直播条件下，研究了壮芽灵浸种对三系杂交水稻德香4103群体结构和产量的影响。结果表明：（1）壮芽灵浸种可以显著提高稻种的发芽势，但发芽率提高不显著；（2）壮芽灵浸种可以缩短从始苗到全苗的时间2 d，在播种量相同的条件下，基本苗和出苗率得到显著提高，基本苗从56.67万株/hm^2提高到68.89万株/hm^2，出苗率从75％提高到91％；（3）壮芽灵浸种可以显著提高群体最高苗数和成穗率，最高苗从573.33万/hm^2提高到612.22万/hm^2，成穗率从44％提高到47％；（4）壮芽灵浸种后有效穗数、结实率、千粒重显著提高，增产达7.70％。

Effects of Seed Soaking with Zhuangyaling on Population Structure and Yield in Direct-seeding System of Rice Variety Dexiang 41 03

The effects of seed soaking with Zhuangyaling （SBS）on population structure and grain yield of three line hy-brid rice variety Dexiang 4103 were studied under direct-seeding condition. The results indicated that：（1）Seed soaking with SBS could significantly increase germination potential of rice seeds,while increase of germination rate was not signifi-cant. （2）Seed soaking with SBS could shorten 2 days from starting emergence to full emergence. Under the condition of the same seed amount,the basic seedling significantly increased from 56.67 ×10^4 plants/hm^2 to 68.89 ×10^4 plants/hm^2 , and the emergence rate significantly increased from 75%to 91%. （3）Seed soaking with SBS could significantly increase maximum tiller number and effective spike rate,the maximum tiller number increased from 573.33 ×10^4/hm^2 to 612.22 × 10^4/hm^2 ,and the effective spike rate increased from 44%to 47%. （4）Seed soaking with SBS significantly increased ef-fective panicles,seed setting rate and 1000-grain weight,thus grain yield was significantly increased 7.70%.