关键词: 草坪, 保温, 浇水, 结缕草, 冬季胁迫, 生理生化指标

Abstract: In order to study the alleviating effect of heat preservation and water application on winter stress of zoysiagrass,‘Zenith’ was used as the experimental material. The heat preservation combined with watering treatment (TW),watering treatment along (W),heat preservation along (T),and no heat preservation and no watering treatment (CK) were carried out respectively. The effects of heat preservation and watering treatment on the percentage of withered and yellow leaves of zoysiagrass were studied. Physiological and biochemical traits were measured.The results showed that either heat preservation (T) or watering treatment (W) could alleviate the stress in winter and slow down the speed of chlorophyll decomposition,and affected the metabolic response of antioxidant enzymes,so as to alleviate the winter stress and delay the time of zoysiagrass entering the dormancy period. In general,the effects of heat preservation and watering treatment on winter stress relief of zoysiagrass can be divided into two orders according to different stages. In the early stage of winter stress,the order of mitigation effect is TW,W,T. In the later stage of winter stress,the order of mitigation effect is TW,T,W. During the whole process of winter stress,TW had the best relieving effect,which could obviously delay the dormancy period of zoysiagrass and keep it warm and green.

Key words: Turf, Heat preservation, Watering treatment, Zoysia japonica, Winter stress, Physiological and biochemical traits