Influence of Thinning Intensity on Growth and Regeneration of Natural Oak Forests Based on Meta-analysis:Implications for Oak Forest Management in China
[Objective]Based on the literature review,the effects of thinning intensity on the growth and regeneration of natural oak forest were studied to promote its scientific management and the improvement of stand quality.[Method]In this study,a Meta-analysis approach was employed by carefully screening published relevant literature data(37 valid literatures;149 pairs of data),to investigate the impact of thinning intensity on the annual increment of diameter at breast height(DBH,mm·a-1),annual increment of stand volume(m3·hm-2·a-1)and seedling density(individuals per 100 m2).[Result]The findings found that moderate thinning(20％～39％)and strong thinning(≥40％)significantly promoted the increment of stand DBH and volume,particularly for the young-aged(≤20 a)and middle-aged forests(21～40 a).However,no significant effects were observed for the near mature forests(41～60 a)and mature forest(＞60 a).Moderate to strong thinning intensity had a significant positive impact on seedling density enhancement,especially for the mature oak forests.Additionally,stands located on sunny slopes and bottom or middle slope positions exhibited more favorable responses to thinning across all three variables studied.The beneficial effects from thinning on the growth of young-to middle-aged oak forests and seedling density of mature oak forests generally lasted about ten years.[Conclusion]Moderate and above thinning intensity(≥20％)significantly enhanced the growth of young-to middle-aged oak forests and seedling density of mature oak forests.Approximate ten-year thinning interval was recommended to consistently improve productivity and recruitment of corresponding oak forests.This study provided valuable scientific guidance for formulating and implementing sustainable management measures for oak forests of China.
natural secondary oak forestgrowthregenerationMeta-analysis
维普
万方数据
