毛竹及其变种叶片化学计量与养分重吸收效率

[目的]评价毛竹(Phyllostachys edulis)及其变种叶片养分重吸收效率,旨在揭示主要养分元素的生态适应机制,以期为毛竹及其变种的可持续经营提供科学依据.[方法]以毛竹及其变种[黄槽毛竹(P.edulis cv.Luteo-sulcata)、花毛竹(P.edulis cv.Tao Kiang)、厚壁毛竹(...

Leaf stoichiometry and nutrient reabsorption efficiency of Phyllostachys edulis and its varieties

【Objective】The objective of this work was to evaluate the nutrient reabsorption efficiency of Phyllostachys edulis and its varieties,and to identify the ecological adaptation mechanism of the main nutrient elements.This will provide a scientific basis for the sustainable management of P.edulis and its varieties.【Method】In this study,the leaf stoichiometric characteristics and nutrient reabsorption efficiency of P.edulis and its varieties(P.edulis cv.Luteosulcata,P.edulis cv.Tao Kiang,P.edulis cv.Pachyloen,and P.edulis cv.Gracilis)were analyzed at different ages(1,3,5 a).【Result】The content of carbon and nitrogen in the leaves of P.edulis and its varieties varied slightly,while the content of phosphorus fluctuated greatly.The contents of C,N and P in the leaves of different bamboo species at the same age were significantly different.The nutrient content in leaves of 1-year bamboo was relatively high.With an increase in age,the adaptability of bamboo gradually decreased.There were some differences in the leaf stoichiometric ratio between P.edulis and its varieties at the same age and between the same variety at different ages.The reabsorption efficiency of N and P in the leaves of P.edulis at different ages was higher.The effect of age on the N reabsorption efficiency of leaves of P.edulis and its varieties increased at first and then decreased,but the P reabsorption efficiency of bamboo leaves fluctuated greatly at different ages.【Conclusion】The growth of P.edulis and its varieties was limited by the P element,and the adaptability changed with an increase in age for P.edulis and its varieties.P.edulis cv.Tao Kiang showed strong adaptability,while P.edulis cv.Pachyloen had the opposite trait.