关键词: 雷竹, 覆盖栽培, 出笋规律, 生态因子, 温度

Abstract: [Objective] The aim of the study was to revealed eco-physiological response mechanisms of mulching cultivation bamboo forest and to provided a basic evidence for modern directive breeding and ecological rehabilitation technology of bamboo forests. [Method] Contrasting design and correlation analysis were used in this study to explore shooting law and its correlation with temperature of mulching 0year (control), 1 year, 3 years, 6 years, 9 years, 12 years P. prevernalis forests. [Results] In all bamboo forests, the shooting time was earliest in mulching 1year forest. Its shooting duration was longest and shoots yield was highest (16 633.93kg/hm²). The shoots yield in 3, 6, 9 and 12 years forests were, respectively, 15 422.97, 12 004.90, 11 652.36 and 10 288.25kg/hm². The shooting time of was latest and shooting duration was shortest in the control forest. Its shoots yield was lowest and only 8 173.60kg/hm². All shooting of bamboo forests had no significant correlation with air temperature. However, control forest had the most significant correlation with air temperature and the correlation coefficient (r)reached 0.866. Except for 1 year and 12 years bamboo forests, shooting had no significant positive correlation with ground temperature but all r values were higher than 0.650. [Conclusion] Ground mulching advanced shooting time, prolonged shooting duration and increased shoots quantity. However, following the increase of mulching periods, the shoots yield decreased. This might be caused by shooting ability of bamboo rhizome. In this case, it was necessary to innovate cultivation technology. Meanwhile, ecological restoration technology of degraded bamboo forest will needed for sustainable management of bamboo forest.

Key words: Phyllostachys praecox cv.prevernalis, mulching cultivation, shooting law, ecological factor, temperature