摘要
有关高羊茅、结缕草的实验研究发现 ,草坪草的抗旱性与其根系的增深、增大密切相关。不同种或品种的草坪草 ,其抗旱机制不尽相同 ,抗旱能力也有差异。高羊茅靠增深根系 ,从土壤深层吸收更多的水分来维持其较高的蒸散率 ,达到抗旱的目的。结缕草具较低的蒸散率 ,以保持体内水分平衡 ,线性梯度灌溉研究表明 ,不同品种的结缕草所需额外灌水是不同的 ,其种内部存在着遗传上的差异。选择节水草种能够节水 50 % ,甚至更多。
The experimental studies on Fescue and Zoysia showed that the drought resistance of turfgrass was closely related with its increasing of root amount. The mechanism was different with different turfgrass species and cultivar. The Fescue depends on increasing its length of root and absorbs more water to maintain its high evaporation (ET), to match the aim of drought resistance. Zoysia depends on the lower evaporation to decrease vapor and maintain the balance of water. Line step irrigation system research showed that different Zoysia species had different requirement of the additional irrigation. There is a difference in the inner of Zoysia species genetics.
出处
《中国草地》
CSCD
2001年第4期66-68,共3页
Grassland of China
基金
科技部"首都圈"防沙
治沙应急绿化示范项目"资助
