硒肥配施对芝麻硒素吸收和产量的影响

探讨不同硒肥施用方式对芝麻（Sesamum indidum L.）硒素吸收和产量的影响.通过设对照、X1（富硒液肥）、X2（富硒液肥+锌）、X3（富硒液肥+磷酸二氢钾）、X4（富硒液肥+锌+磷酸二氢钾）5个处理研究硒肥配施对芝麻（郑芝DW607）硒素吸收、物质分配、产量的影响.结果表明：各处理施用硒肥后芝麻产量均有增加，X4处理芝麻产量增幅最大.与对照相比，X4处理在株高、果轴长度、单株蒴数、蒴粒数、千粒质量和单株产量分别提高了13.8%、26.7%、21.0%、25.5%、8.1%和20.5%，差异达显著水平.成熟期各器官硒含量为叶片＞籽粒＞蒴果皮＞茎＞根，籽粒中以X4处理硒含量最高，较对照提高93.3%.富硒液肥+锌+磷酸二氢钾复配后叶面喷施可促进硒素吸收，提高籽粒和叶片中硒素含量.

Effcts of combined application of selenium fertilizer on uptake and yield of sesame

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.