【摘要】 经连续三年的小区试和生产实验表明，小麦在一定生长发育时期，适时、适量、均匀一致地喷施２，４－Ｄ丁酯和复硝钠合剂（简称合剂）不仅除草率可达８５％以上，而且有效地加速小穗小花分化促进了小麦双重小穗和顶端小穗的分枝，使穗粒数明显增加，茎杆显著降低．从而为小麦生产开辟了一条新的化学调控增产途径．更多还原

【Abstract】 A three-year successive plot and filed experiment is studied on wheat. The results indicate by spraying 2, 4-D Butyl buttoned and Sodium nitrate mixture in a contain growing Period on wheat, the ratio of weed management Comes up to 85 percent or more. In addition, under that treatinert, wheat can be promotedto from double speciallize, the filled grains per panicle increase and the heightof calm apparently shortened. It is a mew path of wheat prolactin更多还原