FINE ROOT TURNOVER IN FOREST ECOSYSTEMS IN RELATION TO QUANTITY AND FORM OF NITROGEN AVAILABILITY - A COMPARISON OF 2 METHODS
FINE ROOT TURNOVER IN FOREST ECOSYSTEMS IN RELATION TO QUANTITY AND FORM OF NITROGEN AVAILABILITY - A COMPARISON OF 2 METHODS
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DOI：
10.1007/bf00378292
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发表时间：
1985-01-01
期刊：
影响因子：
2.7
通讯作者：
PASTOR, J
中科院分区：
文献类型：
--
作者：
ABER, JD;MELILLO, JM;PASTOR, J
通过比较生物量的季节最大值[max]和最小值[min]和N的预算，对13个形态(NH4+与NO3-)和有效氮含量范围较大的森林生态系统的细根产量和周转进行了比较。对于硝化率较低的林分，这两种方法得出的结果相似。对于具有显著硝化速率的系统，预算方法预测的细根周转率和生产力高于最大-最小方法。
Two methods of estimating fine root production and turnover are compared for 13 forest ecosystems exhibiting a wide range in form (NH4+ vs. NO3-) and quantity of available N. The 2 methods are by comparison of seasonal maxima [max] and minima [min] in biomass and by N budgeting. Both methods give similar results for stands with low rates of nitrification. The budgeting method predicts higher fine root turnover and productivity than the max-min method for systems with significant rates of nitrification.