The Compensatory Tillering in the Forage Grass Hordeum brevisubulatum After Simulated Grazing of Different Severity

作者：Jihong Yuan, Haiyan Li, Yunfei Yang · 发表于：Frontiers in Plant Science · 年份：2020 · DOI：10.3389/fpls.2020.00792 · 被引用次数：45 · 研究领域：Ecology and Vegetation Dynamics Studies、Turfgrass Adaptation and Management、Pasture and Agricultural Systems

The response of compensatory growth is an important adaptive strategy for plants to herbivore foraging. However, most previous researches on plants compensatory growth focused on the compensation of the biomass or the number of sexual reproductive offspring, neglected the compensatory growth of vegetative reproduction. It is important not only for plants compensatory growth studies, but also for theoretical and practical of grassland production. The clonal tussock grass, Hordeum brevisubulatum was selected as research object. Four different clipping intensities (unclipping and clipping stubble at 15cm, 10cm and 5cm height) at jointing stage and flowering stage were implemented to study the effect of simulated foraging. To explore the effect of recovery growth time on plant growth after simulated foraging, three times sampling were taken at different recovery time after simulated foraging (respectively 1, 3 and 7 weeks). We found light and moderate simulated foraging intensity significantly increased the number of buds and juvenile ramets, the promotion of simulated foraging on the number of buds and juvenile ramets was higher in jointing stage than flowering stage, and the increase of simulated foraging intensity decreased with the prolong of recovery growth time. The number of ramets signifcantly decreased with the increase of simulated foraging in both jointing stage and flowering stages at 1week after foraging, and the decreasing effect weakened with the prolong of recover...