山西农业大学学报（自然科学版）2019，Vol.39Issue(6)：13-18,6.DOI:10.13842／j.cnki.issn1671‐8151 .201902028
花期喷施亚硒酸钠对小麦生长特性及硒积累的影响
Effects of sodium selenite application at anthesis stage on the growth characteristics and Se accumulation in wheat plants
摘要
Abstract
The purposes of the experiment were to clarify the effects of exogenous selenium application on crop yield and Se accumulation rate in plants ,and to explore a technique for the selenium fertilizer application oA w heat . [M ethods]T he pot experiments w ere conducted at w heat research institute of Shanxi Agricultural University in 2017 and 2018 .Three sodium selenite (SS) levels ,i.e.low (8 mg·L －1 ) ,medium (16 mg·L －1 ) ,and high level (24 mg· L －1 ) were tested ,and the pots without SS application served as control treatment .The effects of SS fertilizer at differ‐ent concentrations on the plant grow th characteristics ,yield ,and Se accumulation rate in w heat were determined by testing relative paremeters .[Results] Study results demonstrated that root length ,root surface area ,root volume ,and root w eight were increased in all SS treatments compared toCK by applicating SS fertilizer during anthesis period ,and root senescence process wasalleviated.T he root‐shoot ratio ,selenium content in various organs ,and various forms of selenium accumulation in grains were all improved.Application withlow and medium level of SS fertilizer significantly improved the dried biomass ,1000－grain weight ,and yield by 8～17%,and the low level of SS fertilizer produced a better outcome ,w hile high SS level produced opposite results .In terms of Se content in various organs ,theprecentage of Se accumulation in stem and leaf ,selenate content and theirpercentage in plants ,and selenium methionine content , they all positively reacted to the application rate of SS fertilizer ,w hile the ratio of Se content in grains to that in entire plants and the content and the percentage of organic‐Se in grains to that in entire plants were negatively reacted to the application rates .[Conclusion] T he low level treatment (8mg·L －1 ) of sodium selenite sprayed at anthesis stage effec‐tively increased the accumulation of dried biomass ,increased the weight of 1000 grains ,increased the yield of grain ,fa‐cilitated selenium to move into grains ,increased the content and ratio of organic selenium ,and reduced the content and ratio of inorganic seleniumaccumulation .关键词
亚硒酸钠/小麦/根系/产量/硒含量/硒形态Key words
Sodium selenite/Wheat/Root system/Grain yield/Selenium content/Organic selenium分类
农业科技引用本文复制引用
董石峰,孙敏,赵剑敏,白雪,卢鹏飞,高志强,任爱霞,侯非凡,尹雪斌..花期喷施亚硒酸钠对小麦生长特性及硒积累的影响[J].山西农业大学学报（自然科学版）,2019,39(6):13-18,6.基金项目
山西省重点研发计划重点项目(201703D211001‐02) （201703D211001‐02）
山西农谷建设科研专项项目(SXNGJSKYZX201703) （SXNGJSKYZX201703）
国家现代农业产业技术体系建设专项经费(CARS‐03‐01‐24) （CARS‐03‐01‐24）
旱作栽培与作物生态山西省重点实验室(201705D11111161) （201705D11111161）
山西省科技创新团队项目(201605D131041) （201605D131041）
山西省回国留学人员科研资助项目(2017‐068) （2017‐068）
晋中市科技计划项目(Y172007‐2) （Y172007‐2）
山西省优秀博士来晋工作奖励资金科研项目(SXYBKY201733) （SXYBKY201733）
