以超级籼粳杂交稻甬优538为试材，研究了机械穴直播在不同播种量（45 kg/hm2和60 kg/hm2）条件下对水稻生长及产量的影响。结果表明，采用机械穴直播技术，虽然出苗率有所下降，但成穗率高，改善了直播稻的生长条件，降低了基部节间的弯曲力矩，使生育后期的倒伏风险明显降低；机械穴直播提高了每穗粒数、结实率和千粒重，产量较人工撒播提高了1.63%~5.48%。

This experiment was conducted to evaluate the effects of hill-drop drilling by KDS-08MS direct seeder on growth and yield of hybrid rice in different seeding rates（45 kg/hm2 and 60 kg/hm2）, using Yongyou 538 as material. The results showed that using the mechanical hill-drop drilling technique, although reduced the emergence rate, increased the productive tiller percentage. It improved the growth condition of direct seeding rice, reduced the bending moment of stalk and decreased the risk of lodging in the late growth stage. Compared with manual broadcast, the mechanical hill-drop drilling technique increased the grains per panicle, seed setting rate and 1000-grain weight, and the yield increased by 1.63%~5.48%.