对抛栽稻和手插稻的比较试验表明：（１） 抛栽稻的生育优势有：分蘖早，分蘖多，有效穗多；根系生长好，吸肥能力强；早稻抽穗期叶面积系数大，生物产量高。晚稻在施用穗肥的条件下也有同样的优势。（２） 抛栽稻的生育劣势有：无效分蘖多，成穗率低；高效叶面积率低，每穗粒数少；茎鞘运转率和经济系数低；抗根倒能力差。（３） 抛栽稻高产的主攻方向是提高成穗率和增加每穗粒数 The comparative experiments on throwing rice and hand inserting rice showed that: (1) The fertility growth of throwing rice was as follows: early tillering, more tillers and more effective spikes; good root growth and strong absorption capacity; leaf area index at early heading stage , High biological yield. Late rice has the same advantage under the conditions of applying panicle fertilizer. (2) Castration of rice throwing growth disadvantages are: invalid tillering more, into a lower ear rate; high efficiency leaf area ratio, grain number per spike; stem and sheath operation rate and economic coefficient is low; (3) Throwing planted high-yielding main direction is to increase the rate of panicle and increase the number of grains per panicle