土壤相对含水量对阿月浑子幼苗水分参数的影响

The effect of relative soil water content on water parameters of pistachio seedlings

对不同供水处理阿月浑子苗木水分参数的测定结果表明,随着土壤相对含水量的降低,Ψπ100、Ψπ0、RWC0、RO WC0和εmax均呈下降趋势,束缚水与自由水比值Va/Vs逐渐提高;严重干旱胁迫(土壤相对含水量为20%)条件下,Ψπ100、Ψπ0增加幅度较小,而RWC0、RO WC0下降幅度较大,说明苗木在干旱胁迫条件下细胞吸水能力的增加小于细胞保水能力的增强,因此,阿月浑子抗旱性以耐旱性为主。

The water parameter of Pistacia vera L. seedlings in different relative soil water content condition was investigated. The results show that the numbers of water parameter such as ψπ100、ψπ0、RWC0、ROWC0 and εmax declined and the number of Va/Vs increased with the water stress. Under the condition of severe water stress, which the relative water content is twenty percent, the numbers of ψπ100 and ψπ0 had slightly increased and the numbers of RWC0 and ROWC0 had greatly declined. It showed that the ability of water absorbability is higher than the ability of water maintenance in seedling＇cell and we concluded that the drought tolerance of pistachio seedlings is the primary way to drought stress.