摘要： 采用盆栽试验、田间试验和室内分析相结合的方法,研究了冬小麦硒素吸收累积特性,并在此基础上选择小麦抽穗期、灌浆初期和灌浆中期进行了不同浓度的叶面喷硒试验。研究结果表明,小麦抽穗期至灌浆期对硒的吸收速度和吸收量最大,在小麦抽穗期至灌浆期进行叶面喷硒(0～100mg/L)对小麦产量影响不大,但能明显提高小麦籽粒的含硒量,且小麦籽粒含硒量随着喷硒浓度的增大而提高,喷硒效果以灌浆初期最好,其次是抽穗期,灌浆中期效果较差。因此,建议在小麦抽穗期至灌浆初期进行叶面喷硒,喷硒浓度以40mg/L为宜,每公顷用液量750kg。

关键词: 冬小麦, 硒, 吸收积累, 叶面喷硒

Abstract: The selenium uptake and accumulation characteristics of winter wheat were studied by means of pot experiment,field testing and laboratory analysis. On this basis,the different concentrations of foliar spray of selenium test were carried out at wheat heading stage,early filling stage and mid-grouting stage. The results showed that the absorption amount and absorption rate of selenium were the largest from wheat heading stage to filling stage. The selenium content of wheat grain could be improved significantly by foliar spray of selenium(0－100 mgSe /L) from heading stage to mid-grouting stage. The effects of foliar spray of selenium was the best at early filling stage,followed by heading stage,then the mid-grouting stage. Therefore,we recommend that foliar spray of selenium concentration 40 mg /L was appropriate from wheat heading stage to early filling stage,with the fluid volume of 750 kg /ha.

Key words: Winter wheat, Selenium, Foliar spray of selenium, Uptake and accumulation

中图分类号: 

• S153