Tan spot, caused by Pyrenophora tritici-repentis, and fusarium head blight (FHB), caused by the Fusarium graminearum species complex, are among the main wheat diseases worldwide. This 3-year field study evaluated the effect of soil incorporation of calcium silicate, a source of silicon (Si), to manage tan spot and FHB and improve grain yield and quality. The effect of Si was compared on two cultivars contrasting in disease resistance and associated with one or two fungicide sprays. Calcium silicate fertilization increased the Si concentration in the soil and wheat leaf and spike tissues. The increase of Si concentration in wheat tissues was associated with reduction in the severity of both tan spot and FHB, consequently increased the quality and grain yield of wheat. The reduction of disease severity conferred by Si was greater for tan spot than FHB. The greatest control of tan spot and FHB was obtained with the moderately resistant cultivar grown in soil amended with calcium silicate (+Si) and treated with two fungicide sprayings. On the other hand, the highest grain yield, under high disease pressure, was obtained in +Si plants, regardless of the cultivar, treated with two fungicide sprays. The results of this study show for the first time that the incorporation of Si in the soil complemented the effect of genetic resistance and fungicide treatments in controlling both tan spot and FHB. Furthermore, results indicate that calcium silicate fertilization is useful as part of integrated management of these wheat diseases.

谈点，由麦类核腔小麦-repentis和赤霉病（FHB），所造成的禾谷镰刀菌种类复杂，是全世界主要的小麦疾病之一。这项为期3年的田间研究评估了土壤中掺入硅（硅）来源硅酸钙对棕褐色斑点和FHB的管理以及提高谷物产量和品质的影响。比较了Si对两种具有抗病性且与一剂或两种杀真菌剂喷雾有关的品种的影响。硅酸钙的施肥增加了土壤，小麦叶片和穗状组织中的硅含量。小麦组织中硅含量的增加与棕褐色斑点和FHB严重程度的降低有关，因此提高了小麦的品质和籽粒产量。Si引起的棕褐色斑点减轻的疾病严重程度大于FHB。棕褐色斑点和FHB的最大控制是在土壤中添加了硅酸钙（+ Si）并用两次杀菌剂喷雾处理的中等抗性品种获得的。另一方面，在高病害压力下，无论哪种栽培品种，用两种杀菌剂喷雾处理后，在+ Si植株中都可获得最高的籽粒产量。这项研究的结果首次表明，在土壤中掺入硅补充了遗传抗性和杀菌剂处理在控制棕褐色斑点和FHB方面的作用。此外，结果表明，硅酸钙施肥可作为这些小麦疾病综合管理的一部分。不论哪个品种，均用两种杀菌剂喷雾处理。这项研究的结果首次表明，在土壤中掺入硅补充了遗传抗性和杀菌剂处理在控制棕褐色斑点和FHB方面的作用。此外，结果表明，硅酸钙施肥可作为这些小麦疾病综合管理的一部分。不论哪个品种，均用两种杀菌剂喷雾处理。这项研究的结果首次表明，在土壤中掺入硅补充了遗传抗性和杀菌剂处理在控制棕褐色斑点和FHB方面的作用。此外，结果表明，硅酸钙施肥可作为这些小麦疾病综合管理的一部分。