Background and aims

The concentration of silicon in crops depends on soil composition and plant type but whether grain yield depends on the wheat varieties that are enriched in Si in wheat remains poorly documented.

Methods

Field and pot experiments were performed on calcareous Cambisols near Montpellier, France, with eight wheat varieties commonly grown in the region. Additionally, we examined two agricultural modalities: with NPK fertilization (CON) and without (CTR). Our investigations included an analysis of soil physicochemical parameters and bioavailable silicon (PAS) extracted by CaCl₂.

Results

There was a significant positive correlation between grain yield and silicon concentration in straw. Interestingly, none of the other soil parameters demonstrated a correlation with grain yield. Although the CON plots exhibited higher levels of clay, CaCO₃, organic carbon, and nitrogen than the CTR plots, these differences did not impact the PAS, straw silicon, or grain yield. Furthermore, a pot experiment involving the Anvergur variety corroborated that the straw silicon concentration remained unaffected by the soil characteristics observed in the field.

Conclusions

Our findings indicate that foliar Si concentrations in wheat does not depend on soil Si pools and NPK addition and that wheat varieties enriched in silicon have the highest grain yield. As such, selecting wheat varieties with high silicon content is pivotal for sustaining optimal yields.

中文翻译：

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品种、植物速效硅和秸秆中养分对 Mauguio 实验站（法国南部）粮食产量的影响

 背景和目标

作物中硅的浓度取决于土壤成分和植物类型，但谷物产量是否取决于小麦中富含硅的小麦品种仍然很少。

 方法

在法国蒙彼利埃附近的钙质 Cambisols 上进行了田间和盆栽实验，该地区普遍种植了 8 个小麦品种。此外，我们研究了两种农业方式：NPK 施肥 （CON） 和无 （CTR）。我们的研究包括土壤理化参数和 CaCl₂ 提取的生物可利用硅 （PAS） 分析。

 结果

秸秆产量与硅浓度呈显著正相关。有趣的是，其他土壤参数都没有显示出与谷物产量的相关性。尽管 CON 图显示出比 CTR 图更高水平的粘土、CaCO₃、有机碳和氮，但这些差异并不影响 PAS、秸秆硅或谷物产量。此外，涉及 Anvergur 品种的盆栽实验证实，秸秆硅浓度不受田间观察到的土壤特性的影响。

 结论

我们的研究结果表明，小麦叶面硅浓度不取决于土壤硅池和 NPK 添加，富含硅的小麦品种具有最高的谷物产量。因此，选择高硅含量的小麦品种对于维持最佳产量至关重要。