1．育苗移栽淮北地区杂交棉作春棉种植，于3月20日开始育苗，作接茬棉4月20日左右育苗为宜。提倡推广三改技术：即一改沟塘泥小方块育苗为营养土大方块或营养钵育苗；二改只浸种不催芽为浸种又催芽；三改小苗移栽为大壮苗移栽，不栽高腿苗，不栽黄弱苗，不栽矮钵苗，提高成活率 1. Breeding cotton seedlings planted in Huaibei area hybrid cotton for spring cotton planting, on March 20 began nursery, pick cotton crop around April 20 or so appropriate. Promote the promotion of three changes in technology: a change ditches pond small box nursery for nutrition soil large box or nutrition bowl nursery; two change only soaking without germination for seed soaking and germination; three change seedlings transplanting for big seedlings transplanting, not planted High-legged seedlings, not planted yellow weak seedlings, do not planted potted seedlings, improve survival rate