The stoichiometry characteristics of Zanthoxylum planispinum var. dintanensis in different plantation ages (5, 10, 20, and 30 yr) in the canyon area of Guizhou Karst Plateau were studied by measuring the C, N, and P content of leaves, litter, and soil. The content of C, N, and P in leaves were 339.17−386.14, 20.95−23.65, and 1.18−1.72 g kg⁻¹, respectively. Carbon and P increased gradually with the plant age, but N did not change significantly. The growth of leaves changed from P restricted to N restricted. Those facts indicate that the main factors of nutrition restriction vary with plantation age. The change of C in litter was not significant with the plantation age. The highest content of N and P were in the 20-yr plantation. By increasing the decomposition rate of litter, Zanthoxylum planispinum var. dintanensis can adapt to the vulnerable habitat of the area. The content of C, N, and P in soil and the stoichiometric characteristics did not change significantly with the plantation age in spite of the overall P deficiency. The correlation of C, N, and P content in leaves, litter, and soil continuum of Zanthoxylum planispinum var. dintanensis plantation was low, and there was no significant interaction and interference, suggesting that the relationship of nutrient inheritance between the continuum of plantation needs further study. The results can set up a theory foundation for the Zanthoxylum planispinum var. dintanensis plantation nutrition management and ecosystem regulation and provide scientific basis for ecological construction and vegetation reconstruction in the canyon area of the Karst Plateau.

中文翻译：

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花椒花椒的化学计量特性。不同年龄的dintanensis人工林

花椒花椒的化学计量特性。通过测量叶片，凋落物和土壤的碳，氮和磷含量，研究了贵州喀斯特高原峡谷地区不同人工林年龄（5、10、20和30年）的丁丹。叶片中的C，N和P含量为339.17−386.14、20.95−23.65和1.18−1.72 g kg ^-1， 分别。碳和磷随植株年龄的增长而逐渐增加，但氮变化不大。叶片的生长从P限制变为N限制。这些事实表明，营养限制的主要因素随种植年龄的变化而变化。凋落物中C的变化与人工林年龄无关。N和P含量最高的是20年人工林。通过增加凋落物的分解速率，花椒变种。dintanensis可以适应该地区脆弱的栖息地。尽管总体上缺磷，但土壤中C，N和P的含量以及化学计量特性并未随种植年龄的增长而发生显着变化。大豆叶片，凋落物和土壤连续体中C，N和P含量的相关性。顶坛花椒变种。dintanensis人工林较低，并且没有显着的相互作用和干扰，这表明人工林连续体之间养分遗传的关系需要进一步研究。研究结果可为花椒（Zanthoxylumplanispinum var）建立理论基础。丹顶人工林的营养管理和生态系统调控，为喀斯特高原峡谷地区的生态建设和植被重建提供了科学依据。