【摘要】 为进一步完善我国植物养分循环模型，收集了51篇国内外中英文文献进行meta分析，研究了草本植物、灌木、乔木氮(N)、磷(P)重吸收特征的差异及温度和降水量对其产生的影响。结果表明：(1)我国草本植物、灌木、乔木凋落叶平均N含量分别为9.05,14.91,12.72 mg/g,草本植物、灌木、乔木凋落叶平均P含量分别为0.50,0.79,0.76 mg/g。草本植物、灌木、乔木的平均N重吸收率分别为64.16%,51.97%,35.82%,草本植物、灌木、乔木的平均P重吸收率分别为65.51%,46.74%,41.72%;(2)草本植物调落叶N,P含量显著低于灌木和乔木，但草本植物N,P重吸收率显著高于灌木和乔木，灌木N重吸收率显著高于乔木，灌木的其他养分重吸收特征与乔木没有显著差异；(3) 3种生活型植物凋落叶N和P含量与年均温呈正比，而N重吸收与年均温呈反比，P重吸收率与年均温不相关。3种生活型植物凋落叶N含量和N重吸收率分别与年均降水量呈正比和反比，凋落叶P含量和P重吸收率均与年均降水量不相关。本研究中草本植物较高的养分重吸收率可能说明其相较灌木和乔木更新速率更快，不同生活型植物对生境具有不同的养分适应策略。该研究中，N的重吸收相较于P受降水和温度的影响更大，这意味着气候梯度上植物N吸收和利用的策略可能比P更灵活。植物的氮、磷重吸收特征与温度和降水的响应关系可能反映了植物对气候梯度上水热条件的适应性差异。更多还原

【Abstract】 In order to further improve the plant nutrient cycle model in China, we used meta-analyses to collect 51 published studies to explore the different N/P resorption pattern between herbs, shrubs and trees and the relationships between N/P resorption, temperature and precipitation in China. The results showed that:(1) average N contents of senesced leaves in herbs, shrubs and trees were 9.05 mg/g, 14.91 mg/g, 12.72 mg/g, respectively; average P contents of senesced leaves of herbs, shrubs and trees were 0.50 mg/g, 0.79 mg/g, 0.76 mg/g, respectively; average N resorption efficiencies of herbs, shrubs and trees were 64.16%, 51.97% and 35.82%, respectively; average P resorption efficiencies of herbs, shrubs and trees were 65.51%, 46.74% and 41.72%, respectively;(2) N and P contents of senesced leaves of herbs were significantly lower than those of shrubs and trees; N and P resorption efficiencies of herbs were significantly higher than those of shrubs and trees; N resorption efficiency of shrubs was significantly higher than that of trees; There was not remarkable difference to other variables of nutrient resorption between shrubs and trees;(3) N and P contents of senesced leaves were positively correlated with temperature; there was a negative relationship between N resorption efficiency and temperature, while P resorption efficiency was not related to temperature; N content of senesced leaves and N resorption efficiency were positively and negatively correlated with precipitation, respectively; there was no correlation between P content of senesced, P resorption efficiency and precipitation; this result indicated that the high nutrient resorption efficiency of herbs might reflect that the regeneration rate of herbs was higher than that of shrubs and trees; it also indicated that different life-form plants had various nutrient adaptation strategies to the environment shifts. In this study, N resorption was more sensitive to the changes of precipitation and temperature than P resorption. It suggested that the strategy of plant N uptake and utilization might be more flexible than that of P along the climate gradients. The response of N and P resorption pattern to temperature and precipitation may imply the difference adaptability of plant to hydrothermal conditions under the climate change.更多还原