传统的棉种繁殖大都采取条播、稀植、重肥、大棵的方式。这种方式居多纯作,复种指数低、密度低、用种多、施肥多、花工多、成本大;要提高霜前花率和繁殖系数比较费力。80年代生产管理体制变革,良繁田分户承包。广大专业户十分讲究繁种的综合 Most of the traditional cotton seed propagation to be broadcast, thin planting, heavy fat, big way. This method is mostly pure, low multiplying index, low density, use more, fertilize more, spend more work, the cost is large; to increase frost bloom rate and propagation coefficient is laborious. 80’s production management system reform, good farms sub-household contract. The majority of professional households are very particular about the comprehensive breeding