复水处理对结缕草草坪质量和生理恢复的影响

干旱是限制草坪草生长的重要环境因子，长期干旱胁迫后复水草坪草恢复生长对于维持草坪质量是非常重要的。本研究以抗旱性不同的青岛结缕草(Zoysia japonica ‘Qingdao’)和沟叶结缕草(Z.matralla)为试验材料，研究干旱后复水处理过程中草坪质量和草坪草生理指标(叶片水势、叶绿素含量、过氧化氢酶活性、相对电导率和丙二醛含量)的变化。结果显示，两种草坪草在复水处理过程中，草坪质量、水势、叶绿素含量和过氧化氢酶活性逐渐升高，相对电导率和MDA含量逐渐降低;在15 d时，两种结缕草均没有恢复到对照水平。两种草坪草相比较，抗旱性较强的沟叶结缕草草坪质量、叶片水势、叶绿素含量、CAT酶活性恢复较快，在复水过程中细胞膜透性和MDA含量始终小于抗旱性较弱的青岛结缕草，说明抗旱性较强的沟叶结缕草复水处理时具有较好的恢复能力。

Effects of rewatering on turf quality and physiological recovery of Zoysiagrass

Drought is an important environmental factor limiting growth of turfgrass. Recovery growth of turf after re-watering is very important for maintaining turf quality. Using two turf cultivar with different drought resistance including Zoysia japonica ‘Qingdao’ and Z.matrella as the experiment materials, their turf quality, leaf water potential, content of chlorophyll, CAT activity, leaf relative conductance and the content of MDA during recovery were studied. The results showed that turf quality, leaf water potential, content of chlorophyll, CAT activity increased gradually, however, leaf relative conductance and the content of MDA decreased gradually during recovery. After 15 days of re-watering, both Z.japonica ‘Qingdao’ and Z.matrella did not recover to the same degree with the control plants. Drought resistance cultivar Z.matrella recovered faster compared with drought sensitive cultivar Z. japonica ‘Qingdao’ during recovery as the he former have higher turf quality, leaf water poteatial, content of chlorophyll, CAT activity. Leaf relative conductance and the content of MDA of Z.matrella were lower than that of Z.japonica ‘Qingdao’ during recovery, which indicated drought resistance cultivar Z.matrella had better recovery capability than drought sensitive cultivar Z.japonica ‘Qingdao’.