生物有机硒对玉米农艺经济性状及子粒硒含量的影响

Effects of bio-organic selenium on agronomic and economic characters and grain selenium content of maize

为探讨生物有机硒对玉米子粒硒富集量及玉米农艺经济性状的影响,采用叶面喷施的方法于玉米抽雄期进行不同浓度和不同用量的处理,并测定了玉米子粒中总硒和有机硒含量及农艺经济相关性状。结果表明,不同处理对玉米植株性状、穗部性状和糖分含量有着不同程度的影响;9个处理中除A1B1外,其他处理在株高和穗位高上均高于CK。9个处理在穗粗、行粒数、百粒重和秃尖长这4个性状表现均优于CK,而在穗长、穗行数和子粒深度方面表现不一;在糖分含量方面,有6个处理相比于CK有所提高,A1B3和A2B3提升最为显著,相比于CK均提高了3.97%;所有处理的硒含量相比CK大幅提升,且均达到了富硒玉米的标准,有7个处理的有机硒占比达到了湖北省食品安全地方标准《富有机硒食品硒含量要求》(DBS 42/002—2014)规定的80%以上。该研究可为玉米生物有机硒合理喷施提供参考。

In order to study the effect of bio-organic selenium on selenium enrichment and agronomic and economic characters of maize,the maize was treated by foliar spraying under different concentration and dosage at maize tasseling stage,and the content of total selenium and organic selenium in maize kernel and its agronomic and economic characters were measured.The results showed that different treatments had different effects on plant characters,panicle characters and sugar content of maize.Among the nine treatments,plant height of A1B1 was lower than CK,while that of other treatments was higher than CK in plant height and panicle height.Among the 7 panicle characters investigated,9 treatments of panicle diameter,kernels per row,one hundred grain weight and bald tip length were all better than CK,but 9 treatments showed different performance compared with CK in panicle length,rows per panicle and grain depth.Six of the nine treatments increased sugar content compared with CK,among which A1B3 and A2B3 increased significantly by 3.97%.Compared with CK,the selenium content of all treatments increased significantly and reached the standard of selenium-rich maize,in addition,the proportion of organic selenium processed in seven treatments has reached more than 80%specified in the local standard of Hubei province for food safety,“The Selenium Content Requirements for Organic Selenium-rich Food”(DBS42/002—2014).This study provided reference for reasonable spraying of bio-organic selenium in maize.