水稻旱育稀植秧苗素质好，移栽返青快，分蘖势强，根系发达，容易夺取高产，近几年在冬闲、蔬菜、绿肥田推广较快。但由于旱育稀植播种密度较大，秧龄弹性小，限制了这一技术向小麦、油菜等晚栽稻田扩展。本试验试图通过摸索不同播种量的秧苗生育规律，并使用多效唑技术，增加 The quality of seedlings of rice in nursery and sparse planting of rice is good, the quality of transplanting and rejuvenation is fast, the tillering potential is strong, the root system is developed and the high yield is easy to be seized. In recent years, the popularization of vegetables and greening fertilizers is quicker. However, due to the density of dry planting and sparse planting seeding, seedling age flexibility is small, limiting the technology to wheat, rape and other late rice fields expanded. This experiment attempts to explore the law of seedling growth at different sowing rates and use paclobutrazol technology to increase