以盆栽五年生白叶单丛茶树为试验材料,模拟土壤干旱环境,研究了土壤干旱对茶树叶片生理生化特性的影响。结果表明,在不同的胁迫程度下脯氨酸、可溶性糖以及丙二醛(HDA)含量均随胁迫程度加深而呈现显著升高的变化规律;超氧化物歧化酶(SOD)活性在轻度干旱胁迫的初期,其活性提高,随着胁迫时间的延长、胁迫强度的加剧,其活性降低,后期又呈现升高的规律;过氧化物酶(POD)活性呈现先降低后升高的变化规律。由此说明,茶树鲜叶在干旱胁迫下通过增加渗透调解物质含量,降低水势,加强保水力来提高其抗旱能力,并通过增强抗氧化酶活性,提高抗氧化能力,减轻干旱胁迫伤害。 Taking potted perennial white leaf tea as test material, simulated the soil arid environment and studied the effect of soil drought on physiological and biochemical characteristics of tea leaves. The results showed that the contents of proline, soluble sugar and malondialdehyde (HDA) increased significantly under different stress levels and showed a significant increase. The activity of superoxide dismutase (SOD) In the early stage of stress, its activity increased. With the prolonging of stress time, the stress intensity was aggravated, the activity decreased, and the law of increase was later. The activity of peroxidase (POD) decreased first and then increased. Thus, the fresh leaves of tea tree under drought stress by increasing osmotic medium content, reducing water potential, enhance water retention to improve its ability to drought, and by increasing antioxidant enzyme activity, improve antioxidant capacity and reduce drought stress injury.