Drought has been identified as a major threat restricting crop production worldwide. Silicon (Si), a beneficial element, has a proven role in enhancing plant tolerance against various biological and environmental stresses, especially drought. Two polyhouse experiments were conducted to evaluate the effect of seed priming and soil application of Si on growth, fruit yield, quality, and water productivity of grape tomato (Solanum Lycopersicon L. var. cerasiform) under drought stress. In the first experiment, Si in the form of monosilicic acid (MSA [H₄SiO₄]) was applied as a seed priming material in five doses (0, 0.063, 0.125, 0.25, and 0.5 mM) under three soil moisture regimes (50%, 75%, and 100% field capacity [FC]). The second experiment consisted of five MSA doses applied as soil incorporation (0, 75, 150, 300, and 600 kg ha^–1) under the same soil moisture regimes used in the first experiment. The results revealed that fruit yield and irrigation water productivity were severely affected by soil moisture deficit at 50% FC, while fruit quality was better at this soil moisture level. Fruit yield was reduced by 95% at 0 mM MSA priming dose at 50% FC compared with fruit yield at 0.25 mM MSA priming dose at 100% FC in the first experiment. In the second experiment, soil incorporation of MSA at 300 kg ha^–1 in combination with 100% FC maximized fruit yield, which was reduced by 96% at 0 kg ha^–1 MSA dose in combination with 50% FC. Exogenous application of MSA at 0.25 mM as a seed priming material and 300 kg ha^–1 as soil incorporation (60 kg ha^–1 soluble Si) also resulted in better fruit yield and irrigation water productivity at 75% FC. Priming seeds of grape tomato with MSA at 0.25 mM or soil incorporating with 300 kg ha^–1 could be recommended to enhance fruit yield of grape tomato grown under soil moisture regime fluctuating between sufficient (100% FC) and moderate soil moisture availability (75% FC).

干旱已被确定为限制全球作物生产的主要威胁。硅 (Si) 是一种有益元素，已证明在增强植物对各种生物和环境胁迫（尤其是干旱）的耐受性方面具有重要作用。进行了两个温室试验，以评估种子引发和土壤施硅对干旱胁迫下葡萄番茄 ( Solanum Lycopersicon L. var. cerasiform ) 的生长、果实产量、品质和水分生产力的影响。在第一个实验中，Si 以单硅酸（MSA [H ₄ SiO ₄]) 在三种土壤水分状况（50%、75% 和 100% 田间持水量 [FC]）下以五种剂量（0、0.063、0.125、0.25 和 0.5 mM）用作种子引发材料。第二个实验包括在第一个实验中使用的相同土壤湿度条件下作为土壤掺入应用的五个 MSA 剂量（0、75、150、300 和 600 kg ha ^–1）。结果表明，果实产量和灌溉水生产力在 50% FC 时受到土壤水分亏缺的严重影响，而在该土壤水分水平下果实品质更好。在第一个实验中，与 100% FC 下 0.25 mM MSA 引发剂量下的果实产量相比，50% FC 下 0 mM MSA 引发剂量下的果实产量降低了 95%。在第二个实验中，土壤掺入 MSA 300 kg ha ^–1结合 100% FC 使果实产量最大化，在 0 kg ha ^–1 MSA 剂量与 50% FC 结合时，果实产量降低了 96% 。外源施用 0.25 mM MSA 作为种子引发材料和 300 kg ha ^–1作为土壤掺入（60 kg ha ^–1可溶性硅）也导致在 75% FC 时更好的果实产量和灌溉水生产力。可以推荐使用 0.25 mM MSA 或掺入 300 kg ha ^{–1 的}土壤对葡萄番茄种子进行引发，以提高在土壤水分充足（100% FC）和中等土壤水分可用性（75% FC）。