缩节胺与萘乙酸和芸苔素内酯配施在杂交棉上的化学调控互作效应

Chemical Regulation Interaction Effect of Combined Application of DPC,NAA and BR on Hybrid Cotton

为植物生长调节剂在杂交棉生产中化学调控应用提供参考,采用2种生长促进剂(萘乙酸NAA和芸苔素内酯BR)分别与植物生长延缓剂(缩节胺DPC)在棉花生产中组合施用,开展植物生长调节剂的2因素3水平完全随机区组试验,分析生长促进剂与生长延缓剂的化促(促生长)与化控(延缓生长)互作效应。结果表明:NAA和BR对杂交棉均有一定的促进生长作用,但其作用重点不同,NAA主要促进棉株个体扩展,利于产量器官形成;BR主要促进叶片功能与植株横向生长;2种促进剂分别与DPC组配施用,具有一定的互作效应,且随生长促进剂与DPC剂量的增加,对DPC化控过度的减缓效果越明显,促生长效果以及与DPC的互作效应NAA高于BR,采用NAA缓解DPC化控过度效果更好;棉田见花期喷施DPC16.65g/hm^2、NAA 40.5g/hm^2,棉花产量可达7350kg/hm^2。

In order to provide a reference for application of plant growth regulator in chemical regulation of hybrid cotton production,two growth promoters(NAA and BR)are combined with plant growth retardants(DPC),and then the chemical promotion(promoting growth)and chemical control(retarding growth)interaction effect of growth promoter and growth retardants are analyzed by conducting two factors three levels completely randomized block experiment of plant growth regulators in cotton production.Result:Both NAA and BR have a certain growth promotion effect on hybrid cotton,however,the key is different,NAA mainly promotes individual expansion of cotton plant and formation of yield organ,while BR mainly promotes leaf function and plant horizontal growth.Application of two promoters combined with DPC respectively has an interaction effect to some extent,and with increase of application level of growth promoter and DPC,the alleviating effect of excessive chemical regulation of DPC is more obvious.The promotion effect of NAA and the interaction effect of NAA and DPC are higher than those of BR.NAA has the better effect to alleviate excessive chemical regulation of DPC.When spraying16.65 g/hm^2 DPC and 40.5 g/hm^2 NAA in cotton fields at flowering stage,the yield of cotton can be up to7350 kg/hm^2.