灌浆期喷施GA3对乌苏1号无芒雀麦农艺性状及种子产量的影响

Effects of exogenous application of GA3 on agronomictraits and seed yield of Bromus inermis cv.Wusu No.1 during grain filling stage

摘要:

以乌苏1号无芒雀麦(Bromus inermis cv.WusuNo.1)为材料,研究灌浆期喷施GA₃对无芒雀麦农艺性状和种子产量的影响。以清水(CK)和浓度分别为10、20、30和40 mg/L的外源GA₃叶面喷施处理灌浆期的无芒雀麦,并测定处理后无芒雀麦的分蘖数、叶长、叶宽、株高、生殖枝、小穗数、花序长、种子数、千粒重和产量等指标。结果表明:叶面喷施低浓度GA₃,显著增加了无芒雀麦种子数、小穗数、千粒重及产量,其中喷施10 mg/L外源GA₃对提高种子产量最为明显,较对照增产35.94%。

Abstract:

This study investigated the effects of exogenous application of GA₃ on agronomic characteristics and seed yield of B.inermis cv.Wusu No.1 during grain filling.Exogenous GA₃ at the concentration of 10,20,30 and 40 mg/L were sprayed on the leaves of smooth brome at grain filling stage,with the water as the control.Tiller number,leaf length,leaf width,plant height,reproductive branch,spikelet number,inflorescence length,seed number and 1000-grain weight were measured.The results showed that the exogenous application of GA₃ to leaves at low concentrations significantly increased tiller number,seed number,spikelet number,1000-grain weight and yield,with the most significant effects observed at 10 mg/L at which seed yield increased by 35.96% compared with the control.