欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2019, Vol. 35 ›› Issue (22): 10-13.doi: 10.11924/j.issn.1000-6850.casb18030067

• 农学 农业基础科学 • 上一篇    下一篇

喷施赤霉素对甜高粱控蘖效果的影响

李金梅1, 张伟1, 赵威军1, 邵荣峰1, 卜华虎2, 王花云1, 薛丁丁1, 张阳1   

  1. 1.山西省农业科学院高粱研究所;2.山西省农业科学院现代农业研究中心
  • 收稿日期:2018-03-13 修回日期:2018-05-11 接受日期:2018-05-25 出版日期:2019-08-13 发布日期:2019-08-13
  • 通讯作者: 张阳
  • 基金资助:
    山西省农业科学院重点攻关项目“甜高粱化控分蘖生理机制及栽培技术研究”(YGG1645)。

Effects of Spraying Gibberellin on Controlling Tillers of Sweet Sorghum

  • Received:2018-03-13 Revised:2018-05-11 Accepted:2018-05-25 Online:2019-08-13 Published:2019-08-13

PDF (PC)

111

摘要： 为了研究喷施赤霉素溶液对甜高粱田间分蘖数和倒伏的影响，试验以‘晋甜杂3号’为试验材料，分别于2~6叶期5个时期叶面喷施浓度为50、100、150、200、250、300、400、500、750、1000 mg/L的赤霉素水溶液，喷施清水作为对照。结果表明：喷施赤霉素后，甜高粱苗期分蘖数显著减少，不同处理时期间，6叶期分蘖数最少；在5个喷施时期内，处理间最少分蘖数分别较对照减少32.2%、30.6%、25.8%、43.5%、89.5%，最佳控蘖浓度均在250~300 mg/L范围内；相关性分析表明，苗期分蘖数与田间倒伏率呈显著正相关，与产量呈极显著正相关；喷施赤霉素可以显著增加甜高粱生物产量，但是控蘖效果越明显增产效应越弱，且本试验各处理并未造成减产。因此，甜高粱6叶期喷施250~300 mg/L的赤霉素水溶液可以有效控制甜高粱苗期分蘖数，增加其抗倒伏性，并且较对照产量保持稳定。

关键词: 大气能见度, 大气能见度, 变化特征, 影响因子

Abstract: To study the effects of spraying gibberellin on tillers and lodging of sweet sorghum.Cultivar sweet sorghum Jintianza3 was used as material, spraying gibberellin solvent of 50mg/L、100 mg/L、150 mg/l、200 mg/l、250 mg/l、300 mg/l、400 mg/l、500 mg/l、750 mg/l、1000 mg/l at 5 periods of 2-6 leaf stage respectively and the water was used as negative control.Results showed that the average tiller number of sweet sorghum was effectively decrease after spraying gibberellin, and reached the lowest level at 6 leaf stage in different treatment periods. The minimum tiller number lowered by 32.2%、30.6%、25.8%、43.5%、89.5% respectively comparing with the control at five periods，and the optimum concentration of gibberellin solvent was between 250-300 mg/L. Correlation analysis revealed that tiller number at seedling stage was significantly positive correlation with lodging rate, and was very significant positive correlation with the yield. The yield significantly increased after spraying gibberellin, and increasing effect of yield was weaker with the effect of controlling tillers, but it couldn’t cause yield reduction. Therefore, the optimum effects on controlling tillers was showed at 6 leaf stage with concentration of 250-300 mg/l, that could increase lodging resistance and keep the yield stable.