试验结果表明 ,地膜甜菜经化学调控可显著影响干物质积累与分配 ,有效控制地上部生长 ,促进地下部生长 ,提高根冠比 ,减少青头比率。以植物生长调节剂甜控一号效果最好 ,可使块根增产21.5 %,提高含糖率0.9%,投入产出比为1∶10.39 ;其次是缩节胺 ,可使块根增产17.0 %,提高含糖率0.8 %,投入产出比为1∶2.82 ;其它化控处理(除壮丰安外)也均有较好的增产增糖效果 The results showed that the chemical regulation of mulched beet could significantly affect the accumulation and distribution of dry matter, effectively control the growth of shoots, promote the growth of underground parts, increase the ratio of root to shoot, and reduce the ratio of green heads. The plant growth regulator sweet first best effect, can increase 21.5% of tuber yield, improve the sugar content of 0.9%, input-output ratio of 1:10.39; followed by shrink amines, can increase the root yield 17.0% Sugar content 0.8%, input-output ratio of 1: 2.82; other chemical control treatment (except Zhuang Feng-an) also have a good yield increase sugar effect