灌溉与草坪草地下植物量关系的研究

Study on relationship between irrigation and underground phytomass of turf

采用大田试验和室内分析相结合的方法,探讨了不同灌溉量与草坪地下植物量的关系及地下植物量动态变化、根系的空间分布,结果表明,在三种草坪草中,高羊茅抗旱性最强,多年生黑麦草抗旱性最差;地下植物量最大值出现在春季,秋季为根系的恢复生长期;轻度水分胁迫有助于根系的生长,充足水分条件并不利于高羊茅根系生长;根系的空间分布呈乘幂关系。

The relationship between irrigation and underground biomass of turf was studied through field test and data analysis. The results indicated that: Tall Fescue is the most drought tolerant, while perennial ryegrass is the worst within three turfgrasses. The highest underground phytomass appeared in springand autumn was the recovering period. Light water stress could strengthen the root growth, and meanwhile, the sufficient water was harmful for the root growth of tall fescue.The distribution of underground phytomass showed an exponent model.