摘要
通过叶面喷施的手段研究了不同喷施时期和不同喷施浓度硒对‘晋苦荞5号’光合特性、籽粒硒积累、品质及产量的影响。结果表明,低浓度硒显著促进植株生长,高浓度硒则抑制其生长。当硒浓度≤1 mg·L^(-1)时,随硒浓度的增加,除籽粒总黄酮外的各项指标均显著提高,并以0.5 mg·L^(-1)的浓度为最佳,同T0相比,T0.5处理SPAD值可提高1.9%~2.2%;净光合速率提高3.2%~5.0%;干物质积累提高1.2%~2.0%;籽粒硒含量可提高1.5~17.7倍;蛋白质含量可提高1.1%~1.6%;脂肪含量可提高2.5%~2.6%;籽粒总黄酮含量则降低2.2%~4.5%;籽粒千粒重可提高3.0%~3.7%;产量可提高9.9%~12.4%。总之,叶面喷施硒可明显提高‘晋苦荞5号’植株光合作用、籽粒硒含量,明显改善品质和提高产量,但不利于籽粒总黄酮的积累,其中以现蕾期喷施0.5 mg·L^(-1)的硒为最佳。
The effects of different spraying periods and different concentrations of selenium on photosynthetic characteristics,grain selenium accumulation,quality and yield of“jin tartary buckwheat 5”were studied by foliar spraying.The results showed that low concentration of selenium significantly promoted plant growth,while high concentration of selenium inhibited plant growth.When selenium concentration was 1 mg·L^(-1) or less,all the indexes of the plants,except the total seeds flavonoids,were significantly improved with the increased concentration of selenium,and the concentration of 0.5 mg·L^(-1) was the best.Compared with T0,the SPAD of T0.5 increased by 1.9%~2.2%,the net photosynthetic rate increased by 3.2%~5.0%,dry matter accumulation increased by 1.2%~2.0%,the selenium content in grains increased by 1.5~17.7 times,protein content increased by 1.1%~1.6%,the fat content increased by 2.5%~2.6%,the content of total flavonoids decreased by 2.2%~4.5%,grain 1000-grain weight increased by 3.0%~3.7%,yield increased by 9.9%~12.4%.In a word,selenium by foliar spraying could significantly improve the photosynthetic rate,grain selenium content,grain quality and yield of“jin tartary buckwheat 5”,but it was not conducive to the accumulation of total flavonoids.Selenium of 0.5 mg·L^(-1) by foliar spraying in the bud stage was the best.
作者
曹昌林
吕慧卿
郝志萍
高翔
CAO Chang-lin;LüHui-qing;HAO Zhi-ping;GAO Xiang(Institute of Sorghum,Shanxi Agricultural University/Shanxi Key Laboratory of Sorghum Genetic and Germplasm Innovation,Jinzhong Shanxi 030600)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2021年第3期207-213,共7页
Soil and Fertilizer Sciences in China
基金
山西省归国留学人员科研资助项目(2015-119)
国家现代农业产业技术体系子项目(CARS-08-B-6)
国家基础性长期性监测项目(AES2020S0406)。
关键词
硒
荞麦
籽粒硒积累
光合特性
品质
产量
selenium
buckwheat
selenium accumulation in grain
photosynthetic characteristics
quality
yield
作者简介
曹昌林(1965-),男,山西平遥人,副研究员,大学本科,长期从事作物栽培与施肥研究。E-mail:changlincao954@163.com;通讯作者:吕慧卿,E-mail:Lhq6868@163.com。
