免耕直播油菜喷施多效唑试验研究

［目的］研究多效唑在免耕直播油菜上的应用效果。［方法］分别设置0、50、100、150、200mg/kg共5个浓度多效唑处理进行不同浓度喷施试验，分别设置3叶期、5叶期、7叶期喷施及空白对照共4个处理进行不同时期喷施试验。［结果］喷施多效唑能培育壮苗、改善株型结构和产量性状，能有效解决因密度较大而形成的群体生态状况变化及分枝节位过高等问题，增产幅度可达29.93%。［结论］免耕直播油菜苗期喷施多效唑具有显著的增产效果。在3~5叶期以100~150mg/kg多效唑药液叶面喷施为宜。

Study of Spraying MET on No-tillage Direct Seeding Rape

Objective] The purpose of this research was to study application effect of spraying MET on no-tillage direct seeding rape.Method] Concentration treatments containing 0,50,100,150 and 200 mg/kg were made for different concentration.Periods treatments of 3 leaf stage,5 leaf stage,7 leaf stage and ck were made for different period on no-tillage direct seeding.Result] Spraying MET could breed sound seedling,improve plant-type structure and yield traits,as well as figure out the problems of the changes of col...