The Effect of Lignin and Nitrogen on the Decomposition of Litter in Nutrient-Poor Ecosystems - a Theoretical Approach
The Effect of Lignin and Nitrogen on the Decomposition of Litter in Nutrient-Poor Ecosystems - a Theoretical Approach
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木质素和氮对贫营养生态系统中凋落物分解的影响 - 一种理论方法
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
E. Bosatta
中科院分区：
文献类型：
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作者：
F. Berendse;B. Berg;E. Bosatta
开发了一个模型来研究碳和氮在分解含有不同有机化合物的底物中的动力学：（i）木质素，（ii）被木质素化合物“掩蔽”的碳水化合物，和（iii）游离碳水化合物。在碳限制和氮限制条件下，模型预测木质素浓度与质量损失率之间呈负线性关系。这种关系的系数由微生物特性和由“掩蔽”碳水化合物的量与凋落物中木质素的量之间的比率（ac）确定。三种不同生态系统的凋落物分解数据被用来获得比率ac的估计。计算值与基于分解过程中纤维素/木质素比率的过程估计的值在相同的范围内。当氮限制微生物生长时，该模型预测质量损失率和初始木质素浓度之间的正线性关系。
A model is developed to study the dynamics of carbon and nitrogen in decomposing substrates that contain different organic compounds: (i) lignin, (ii) carbohydrates "masked" by lignin compounds, and (iii) free carbohydrates. Under conditions both of carbon limitation and of nitrogen limitation the model predicts a negative linear relationship between lignin concentration and rate of mass loss. The coefficients of this relationship are determined by microbial properties and by the ratio (ac) between the amount of "masked" carbohydrates and the amount of lignin in the litter. Litter decomposition data of three different ecosystems are used to obtain estimates of the ratio ac. The calculated values are in the same range as values estimated on the basis of the course of the cellulose/lignin ratio during the decomposition process. When nitrogen limits microbial growth, the model predicts a positive linear relationship between rate of mass loss and initial lignin concentration.