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Abstract The aim of this study was to investigate the effect of different application methods of selenium fertilizer on uptake and yield in sesame (Sesamum indidum L.). A field experiment was conducted to study the uptake and accumulation of different combined application of selenium fertilizer by sesame (cv. Zhengzhi DW607) and the effects of these fertilizers on sesame yield．The experiment included four fertilizer treatments: an unfertilized control, X1 (selenium enrichment liquid fertilizer), X2 (selenium enrichment liquid fertilizer + Zn), X3 (selenium enrichment liquid fertilizer + KH2PO4) and X4 (selenium enrichment liquid fertilizer + Zn + KH2PO4). Results indicated that the yield increased in all treatments following selenium application, with X4 treatment showing the biggest increase. Compared to that of control, plant height, capsule axis length, capsule number per plant, seed number per capsule, 1000-seed weight and yield per plant of X4 treatment increased 13.8%, 26.7%, 21.0%, 25.5%, 8.1% and 20.5%, respectively, with the differences at significant level. The selenium element content of each sesame organ in the order leaves ＞ seeds ＞ capsule peels ＞ stems ＞ roots. The highest content of selenium was determined in X4 treatment, with a 93.3% increase more than that in the contrast. The foliar spraying of a compound geritilizer (selenium enrichment liquid fertilizer + Zn + KH2PO4) stimulated the uptake of selenium by the sesame plant, increased the amount of selenium in leaves and seeds.
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2021, Vol. 34 
