摘要
为探明外源补硒和黄腐酸钾(FAK)对缺硒地区土壤和洋葱种植的效应,采用盆栽方式,以东北缺硒黑土为供试土壤,研究了黄腐酸钾配施不同浓度硒(Se,0.1%、0.2%、0.3%)对洋葱富硒转运特征、产量及农艺性状的影响。结果表明:洋葱各部位硒含量随着亚硒酸钠施用量的增加而增加。与优化配方处理相比,FAK施用后能提高洋葱对硒的富集系数,增加根到鳞茎的转运系数;随着施硒浓度的提升,洋葱中硒含量显著增加,FAK与0.1%亚硒酸钠配施时,根到鳞茎的转运系数最大,鳞茎到假茎和假茎到管状叶的转运系数最低。较优化配方处理,FAK能提高洋葱产量,FAK与0.1%亚硒酸钠配施时,洋葱产量显著高于其他处理,洋葱株高、假茎粗、叶片数和叶绿素含量也优于其他处理。温室盆栽条件下,"优化配方+0.5%FAK+0.1%硒"施肥处理对缺硒土壤中洋葱的鳞茎硒富集、产量和农艺性状具有较好促进效应,为最佳施肥配方。
In order to explore the effects of exogenous selenium and fulvic acid potassium (FAK) on soil and onions cultivation in selenium-deficient areas,the effects of FAK combined with different concentrations of selenium (Se,0.1%,0.2%,0.3%) on the translocation characteristics,yield and the influence of agronomic traits were studied by taking potted cultivation methods,using the black soil lacking selenium in the northeast as the test soil.The results showed that the content of Se in each part of onion increased with the amounts of application of sodium selenite.Compared with the optimized formula treatment,FAK application could increase the enrichment coefficient to Se of onion and increase the translocation coefficient from root to bulb.The selenium content in onion increased significantly with the increase of selenium concentration,the transfer coefficient from root to bulb was the largest,and the translocation coefficient from bulb to pseudostem and pseudostem to tubular leaf was the lowest when FAK and 0.1% sodium selenite was applied in combination.Treatment of FAK with optimized formula could increase the yield of onion.When FAK was combined with 0.1% sodium selenite,yield of onion was significantly higher than other treatments,and the plant height,pseudostem diameter,number of leaves and content of chlorophyll of onion were also better than other treatments.Under the pots experimental conditions,fertilization treatment of the "optimized formula+0.5% FAK+0.1% Se" had a good promotion effect on Se enrichment,the yield and agronomic traits of onion in selenium-deficient soil,which was the best fertilization formula.
作者
李芳艳
卢维宏
张乃明
刘娟
鲁春辉
LI Fangyan;LU Weihong;ZHANG Naiming;LIU Juan;LU Chunhui(College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,China;College of Plant Protection,Yunnan Agricultural University,Kunming 650201,China)
出处
《蔬菜》
2022年第1期24-29,共6页
Vegetables
基金
云南省重点研发计划项目(2018BC003)。
关键词
黄腐酸钾
外源补硒
吸收转运
洋葱
产量
fulvic acid potassium
exogenous selenium supplement
absorption and translocation
onion
yield
