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叶面喷硒对糯玉米生理特性及籽粒硒含量的影响
Effects of foliar spraying selenium on physiological characteristics and grain selenium content of waxy corn
投稿时间:2019-06-30  修订日期:2019-07-15
中文关键词:叶面喷硒  糯玉米  生理指标  籽粒硒含量
英文关键词:foliar spraying selenium  waxy corn  physiological index  grain selenium content
基金项目:山西农谷建设科研专项项目(SXNGJSKYZX201703)、山西省重点研发计划重点项目(201703D211001-02-02)
作者单位E-mail
杨舒添 山西农业大学 5934595@qq.com 
杜天庆 山西农业大学 tgdtq1968@sina.com 
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中文摘要:
      为了探索叶面喷硒对糯玉米影响的生理机制,明确叶面喷硒的最佳浓度和筛选高效吸收利用硒元素的糯玉米品种。本试验采用2因素裂区设计的方法,对当前生产中主推的4个糯玉米品种在5个供硒水平下的不同生理指标及籽粒硒含量进行了比较研究。结果表明,60g?hm2的叶面喷硒处理不仅可以显著提高糯玉米POD活性、GSH含量,降低MDA含量,还能够有效提高糯玉米叶片中叶绿素含量以及叶绿素a/b值,在该浓度下四个品种籽粒硒含量与对照相比都极显著增加。品种、浓度单一及其互作对籽粒硒含量的影响都存在显著差异,各因素对总变异的贡献是浓度>品种>品种×浓度。与各自Se0处理相比,4个品种的籽粒硒平均含量分别提高了118.0545、139.3179、162.9583和87.1647μg?kg-1,CTN1965与JN20具有较强的富硒能力。叶面喷硒浓度83.8636 g?hm-2为本试验条件下的限量值,在该喷硒浓度下,籽粒硒平均含量可以达到300μg?kg-1的安全上限。
英文摘要:
      In order to explore the physiological mechanism of the effect on foliar spraying selenium in waxy corn,determine the optimum concentration of selenium foliar spraying on waxy corn ,and select the waxy corn varieties with high absorption and utilization of selenium. Two-factor split-plot design method was used to comparative study the different physiological indexes and grain selenium content of four main extension planting waxy maize varieties under five selenium levels. The results showed that 60 g? hm-2 spraying selenium level on waxy corn could not only increase the POD activity,GSH content and reduce MDA content,but also effectively increase the chlorophyll content and chlorophyll a/b value. Compared with Se0,the content of selenium in grain of four cultivars increased significantly at this concentration. There were significant differences in the effects of variety,concentration and interaction on grain selenium content. The contribution of each factor to total variation was concentration > variety > interaction between variety and concentration. Compared with respective Se0 treatments,the grain average selenium contents of the four cultivars were increased 118.0545,139.3179,162.9583 and 87.1647 g?kg-1. CTN1965 and JN20 had stronger selenium enrichment ability. The leaf spraying selenium concentration was 83.8636 g?hm-2,which was the limit value of the experiment. Under the spraying selenium concentration,the average selenium content of grains could reach the safety upper limit of 300g?kg-1.
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