带状轮伐毛竹林林分恢复特征研究

[Objective]Moso bamboo(Phyllostachys edulis)is an important component of forest resources in China.Strip cutting is a new type of efficient and suitable mechanized bamboo forest management model.This model utilizes the integration characteristics of bamboo clones to set up harvesting and retention zones,and the nutrients in the retention zone are transmitted through the whip root system to support the renewal of the harvesting zone.To explore the recovery characteristics of bamboo stands in different logging bandwidths(3 m,5 m,8 m)and rotation periods(2 a,4 a,6 a),this study used the original reserve zone as the logging zone and the original logging zone as the reserve zone for rotation.[Method]The study investigated and analyzed the growth of new bamboo,changes in soil nutrients,and underground whip root characteristics in different logging bandwidths and rotation periods after rotation,providing a basis for sustainable management of strip cutting.[Result]After rotational logging,the recovery characteristics of newly formed bamboo are similar to those of the first harvesting,that is,compared with traditional selective logging,the number of shoots and mature bamboo increases,the average diameter at breast height and height under branches decrease,and the proportion of biomass of newly formed bamboo leaves increases.This phenomenon becomes more pronounced as the harvesting bandwidth increases.The performance of newly grown bamboo is similar in each rotation period.[Conclusion]Overall,reducing the cutting bandwidth of strip cutting can to some extent slow down the decline in the quality of new bamboo;The recovery situation of bamboo stands under three different rotation periods is similar.The rotation period can be determined according to specific production and management goals.