土壤碳氮磷化学计量比时空格局及影响因素研究进展

发布时间：2018-03-15 03:10

本文选题：土壤碳氮磷计量比　切入点：时空变化格局　出处：《应用与环境生物学报》2017年02期 　论文类型：期刊论文

【摘要】：土壤碳氮磷化学计量比(C:N:P)可以反映有机质质量和含量,其研究对于理解生态学过程和生态系统对气候变化与干扰的响应十分重要.综述了土壤C:N:P随土层深度、海拔、纬度和演替梯度上的时空变化格局及其影响因素:土壤N:P和C:P随土壤深度而递减,但土壤C:N随土层深度的变化趋势还有争论;土壤C:N随海拔变化并非呈现简单的线性关系而是复杂多变的;在全球和区域尺度上,土壤C:N随纬度增加而增大,而土壤C:P则减小;在演替过程中,受到所选择的演替阶段及其时间序列范围和环境特征等因素影响,土壤C:N:P的演替变化趋势存在明显的争论.综合分析表明:1)对土壤C:N关注多,而N:P与C:P研究较贫乏;2)土壤C:N:P的时空变化格局规律还不完全清楚;3)土壤C:N:P受气候、土壤、植被以及人为活动的影响是清楚的,但其机制并不清楚.因此,未来需要更多地聚焦土壤N:P与C:P的变化格局规律,关注土壤C:N:P变异的多种(生物、物理与化学)作用机制研究及其与生态系统结构和功能动态变化的关系,并通过整合植物-凋落物-土壤系统的化学计量学研究,为深入揭示营养元素的生物化学耦合循环规律提供新证据.
[Abstract]:Soil carbon, nitrogen and phosphorus stoichiometry can reflect the quality and content of organic matter, and its research is very important to understand the ecological process and ecosystem response to climate change and disturbance. Temporal and spatial patterns of latitude and succession gradient and their influencing factors: soil N: P and C: P decreased with soil depth, but the variation trend of soil C _ (1) N with soil depth was controversial. The variation of soil C: n with altitude is not simple linear, but complex. At global and regional scales, soil C: n increases with the increase of latitude, while soil C: P decreases. Influenced by the selected succession stage, the range of time series and the environmental characteristics, the succession trend of soil C: n: P is obviously disputed. The comprehensive analysis shows that: 1) more attention is paid to soil C: n. But the temporal and spatial patterns of soil C: n: P are not completely clear.) the effects of climate, soil, vegetation and human activities on soil C: n: P are clear, but the mechanism is not clear. In the future, more attention should be paid to the pattern of soil N: P and C: P, and to the study of the interaction mechanism (biological, physical and chemical) of soil C: n: P variation and its relationship with the dynamic changes of ecosystem structure and function. By integrating the chemometrics of plant-litter-soil system, this paper provides new evidence for revealing the biochemically coupled cycle of nutrient elements.
【作者单位】：中国科学院山地生态恢复与生物资源利用重点实验室生态恢复与生物多样性保育四川省重点实验室中国科学院成都生物研究所;中国科学院大学;
【基金】：国家自然科学基金项目(31470023)资助~~
【分类号】：S153

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