利用盆栽试验,研究了施硅(K2SiO3)对黄瓜叶片组织结构和保水能力的影响。结果表明:硅显著增加了黄瓜叶片的厚度(3.03%～4.08%)、表皮层厚度(3.53%～7.23%)、栅栏组织厚度(5.69%～11.52%)及叶片组织紧密度(2.59%～7.11%),降低了叶片比表面积(4.76%～7.14%),显著降低了叶片组织疏松度(2.26%～2.45%),减少了水分蒸腾(25.8%～27.6%),显著提高了叶片含水量(3.25%～3.62%);硅通过改变植株叶片结构而降低蒸腾、提高保水能力,这是硅增强黄瓜抗旱性的重要原因。 Pot experiments were conducted to study the effects of silicon on the tissue structure and water holding capacity of cucumber leaves. The results showed that silicon significantly increased the thickness of cucumber leaves from 3.03% to 4.08%, the thickness of epidermis from 3.53% to 7.23%, the thickness of palisade tissue from 5.69% to 11.52% and the leaf tissue tightness from 2.59% to 7.11 %), Decreased leaf specific surface area (4.76% -7.14%), significantly decreased leaf tissue porosity (2.26% -2.45%), decreased water transpiration (25.8% -27.6%) and significantly increased leaf water content 3.25% ~ 3.62%). Silicon can reduce transpiration and improve water retention capacity by changing the leaf structure of plants, which is an important reason that silicon enhances the drought resistance of cucumber.