人工栽培野山杏的抗旱性研究

Study on Drought Resistance of Artificial Cultivation of Wild Apricot

在温室条件下，以盆栽1a生野山杏的叶片、茎、根为试验材料，设置100％、80％、60％、40％4个水平土壤含水量处理，分别胁迫处理7、14、21d后，研究测定了叶、根、茎中脯氨酸、可溶性糖、淀粉含量、相对含水量及叶面积的变化。结果表明：随水分胁迫的加剧，野山杏苗木叶片的脯氨酸含量迅速增加，但脯氨酸积累幅度降低；叶片中可溶性糖含量随水分胁迫时间的延长而下降，但在土壤含水量为40％时，可溶性糖含量上升；茎中的可溶性糖含量先增加后降低；叶和茎中的淀粉含量随着水分胁迫的加剧，先降低后增加，随着胁迫时间的延长，在各个水分胁迫的淀粉含量减少；随水分胁迫时问的延长叶片相对含水量随胁迫程度的加剧而增加，茎、根相对含水量降低。但土壤相对含水量40％时随水分胁迫程度的加深，茎相对含水量呈增加趋势。试验表明，1a生野山杏实生苗土壤水分的田间持水量以60％～80％为宜。

Under greenhouse conditions,with the leaf, stem, root of potted 1 year wild apricot as the test material,four levels of soil moisture treatment,respectively 100% ,80% ,60% ,40%, under water stress treats 7 days, 14 days, 21 days later were set and determination of changes of proline, soluble sugar, starch contents, the relative water content,leaf area were studied. The results showed that with increasing of water stress, the proline content of wild apricot seedlings increased,but the accumulation of proline showed decline. The content of soluble sugar in the leaves decreased with the water stress time prolonging, but when the soil moisture content was 400/00, the content of soluble sugars in leaves increased. The content of soluble sugar in the stem increased first and then decreased. The leaves and stems of starch content decreased first and then increased with the increasing of water stress, with the extension of stress time, starch content of each level decreased. With the water stress time prolonging and the deepening of water stress, leaf relative water content increased, the stem, root relative water content reduced. But when the soil relative water content was 40 %, the relative water content in stem was increased with the deepening of water stress. In short,soil moisture of 1 year wild apricot seedlings was field.capacity between 60 % ~ 80 %.