叶面喷施硒酸钠对不同小麦品种(系)籽粒硒及其他矿质元素含量的影响

Effect of Sodium Selenate Application on Concentrations of Selenium and Other Minerals in Grains of Different Wheat Genotypes

为了解叶面喷施硒酸钠对不同小麦品种(系)籽粒硒含量及其他矿质元素的影响,对114个不同小麦品种(系)进行叶面喷施硒酸钠,试验设4个梯度,分别为0 mg·kg^(-1)(CK)、100 mg·kg^(-1)(Se10)、200mg·kg^(-1)(Se20)、300mg·kg^(-1)(Se30),利用离子发射光谱-原子吸收仪测定了籽粒硒、钙、镁、铜、铁、锰、锌、硫含量。结果表明,叶面喷施硒酸钠可以提高小麦籽粒的硒含量,增幅因品种(系)而异;CK、Se10、Se20及Se30处理下,籽粒的总硒含量分别为1.54、5.70、10.01和13.10mg·kg^(-1)。籽粒中不同矿物质元素对叶面喷施硒酸钠的响应不同;籽粒中硒与其他元素的积累既有协同也有拮抗作用,因元素种类、小麦品种(系)和施硒量而异。总体而言,高浓度硒处理降低了籽粒中钙、镁、铜、铁、锰和硫的含量,但提高了锌的含量。

To clarify the effects of foliar application of sodium selenate on concentration of total seleni- um（Se） and other mineral elements in grains of different wheat varieties（lines）, four treatments, such as0 mg. kg-l（CK）,100 mg kg 1（Se10）,200 mg. kg 1（8e20） and 300 mg kg-l（Se30）,were sprayed uniformly on the leaves of 114 wheat varieties（lines）. The concentrations of Se, Ca, Mg, Cu, Fe,Mn,Zn and S were measured using ICP（Inductively Couple Plasma） method. The results indicate that sodium selenate application significantly increased Se concentration in grains of wheat,but the in- crease rate varied among varieties（lines）. The average total Se concentration under four treatments was 1.54,5.70,10.01 and 13.10 mg kg-1 ,respectively. The other mineral elements responded either synergistically or antagonistically to selenate application, depending on mineral type, wheat genotypes and Se dosage. In general, sodium selenate decreased the concentrations of Ca,Mg,Cu,Fe,Mn and S, but increased Zn concentration in grains.