对野燕麦(Avend fdtud)、黄花茅(Anthoxdnthum odorotum)、AvenuldPrdtensis 和发草(Deschampsid cespisosa)四种有芒牧草种子在干燥和潮湿土壤上测定了其由芒所造成的种子迁移的变化情况。指出,空气湿度的变化对有芒种子迁移的影响是很重要的。在潮湿土壤上种子的迁移很小,既使在干燥土壤上除其他特殊情况外,种子的迁移距离对侧向分布或种子埋深不大 The changes of seed migration caused by M. mangostana on dry and wet soils were tested on four species of wild forage grass such as Avend fdtud, Anthoxdnthum odorotum, Avenuld Pdndisis and Deschampsid cespisosa. Pointed out that the change of air humidity on the seedling migration is very important. The migration of seeds is very small in wet soils, and even in dry soils, the migration distance of the seeds is laterally distributed or the seeds are not deeply buried, except in other special circumstances