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在水稻机械抛秧大田调查研究基础上，研究了适宜于机械抛秧的立苗环境及立苗过程。结果表明：适宜于机抛的早稻秧苗叶龄为４．５～５．０叶，苗高１２～１５ｃｍ。机抛时秧土含水量宜控制在３０％～３５％。机械抛秧入土角度＜３０°的比例大于手抛秧，约占６７％。机械抛秧后有一个立苗的过程，不同角度入土的秧苗根系生长速度不同，因而立苗时间有差异，抛后至全部秧苗直立大约需要５～７天。本文还就进一步提高抛秧质量，在抛秧机性能的改进和农艺上应采取的措施等问题作了探讨。
Based on the investigation of rice seedling throwing in the field, the seedling establishment and seedling establishment suitable for mechanical throwing seedling were studied. The results showed that the leaf age of rice seedlings suitable for machine throwing was 4.5-5.0 leaves and the height of seedlings was 12-15 cm. Machine thrown when the water content of seedlings should be controlled at 30% to 35%. Mechanical throwing seedling into the soil angle <30 ° greater than the proportion of throwing seedlings, accounting for about 67%. Mechanical throwing seedlings after a process of establishing seedlings, different angles of the roots of seedlings grown in different growth rates, and thus stand Li difference, after throwing all seedlings upright about 5 to 7 days. This article also discussed the problems of further improving the quality of throwing seedlings, improving the performance of the rice transplanter and the agronomic measures to be taken.