[Objective]To clarify the different plant growth regulator effects on common buckwheat yield in single treatment and different combinations treatment,then provide a theoretical basis for high yield cultivation of common buckwheat.[Method]Tongliaobendixiaoli of common buckwheat was used as experiment material in different period of spraying plant growth regulator,spraying plant growth regulator with different concentration in flowering stage,the main agronomic traits and yield were measured at maturity stage.[Result]The results showed that the yield of Tongliaobendixiaoli had been increased considerably with plant growth regulator concentration of 150 mg/L(spraying PPP333 in branching stage and spraying GA3in flowering stage,or with spraying PPP333in branching stage and spraying NAA in grain filling stage).Yield of Tongliaobendixiaoli had been increased considerably,when treated with GA3 at the concentration of 75 mg/L,PPP333at the concentration of 150 mg/L and NAA at the concentration of 75 mg/L in flowering stage.[Conclusion]Spraying suitable GA3,PPP333and NAA can increase the yield of common buckwheat,and there is a certain synergism and antagonism among three plant growth regulators.%[目的]明确不同植物生长调节剂在单一处理和不同组合处理时对甜荞产量的影响,为甜荞的高产栽培提供理论依据.[方法]以甜荞品种"通辽本地小粒"为试验材料,在不同时期喷施植物生长调节剂、在花期喷施不同浓度的植物生长调节剂,于成熟期测定主要农艺性状和产量.[结果]在植物生长调节剂浓度为150 mg/L时,于甜荞的分枝期喷施PPP333、开花期喷施GA3或分枝期喷施PPP333、灌浆期喷施NAA可显著提高甜荞的产量;在甜荞开花期喷施75 mg/L的GA3、150 mg/L的PPP333、75 mg/L的NAA也可显著提高甜荞的产量.[结论]适宜的GA3、PPP333和NAA处理能提高甜荞的产量,3种植物生长调节剂间同时存在一定的协同作用和拮抗作用.
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