辽东山区不同林龄落叶松人工林土壤-根系C∶N∶P生态化学计量特征

生态学杂志

辽东山区不同林龄落叶松人工林土壤-根系C∶N∶P生态化学计量特征

曾凡鹏^1,2,迟光宇^1*,陈欣¹,史奕^1

(¹ 中国科学院沈阳应用生态研究所，中国科学院污染生态与环境工程重点实验室，沈阳 110016； ²中国科学院大学，北京 100049)

出版日期:2016-07-10 发布日期:2016-07-10

The stoichiometric characteristics of C, N and P in soil and root of larch (Larix spp.) plantation at different stand ages in mountainous region of eastern Liaoning Province, China.

ZENG Fan-peng^1,2, CHI Guang-yu^1*, CHEN Xin¹, SHI Yi^1#br#

(¹Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; ^2University of Chinese Academy of Sciences, Beijing 100049, China).

Online:2016-07-10 Published:2016-07-10

摘要/Abstract

摘要： C、N、P元素的循环过程是影响森林生态系统功能的重要因素。本文利用空间代替时间的方法，对辽东山区落叶松人工幼龄林(10 a)、中龄林(25 a)、成熟林(50 a)土壤、根系的C、N、P含量及其生态化学计量特征进行了研究。结果表明：土壤C、N、P含量均随着林龄的增加而降低；C∶N和C∶P随林龄的增加而增加，N∶P随林龄变化不显著；落叶松根系N、P含量及C∶N和C∶P受林龄影响显著，N、P的含量随林龄的增加而降低，C∶N和C∶P随林龄增加而增加，C含量和N∶P随林龄变化不显著；随着林龄的增加，该地区落叶松人工林地地力呈逐渐衰退的趋势。建议通过间伐调整林分结构，并适度施肥来改善土壤肥力。

关键词: 环境效率, 碳排放, SBM模型, 中国西部

Abstract: The cycling of C, N and P is important in functioning of forest ecosystem. By applying the method of spatial sequence instead of time successional sequence, the contents and stoichiometric ratios of C, N and P in soil and root of larch (Larix spp.) in young (10 a), middleaged (25 a) and mature plantation (50 a) located in the montane region of eastern Liaoning Province, China were studied. The results showed that the contents of soil C, N and P decreased significantly with the increasing stand age. The soil C∶N and C∶P increased with the increase of stand age. The stand age had no significant effect on N∶P in soil. The N, P, C∶N and C∶P in roots changed significantly with the increase of stand age. The contents of N and P in roots decreased significantly with the increasing stand age. The root C∶N and C∶P increased with the increasing stand age. The stand age had no significant effect on the content of C and N∶P in roots. Our results suggested that the soil fertility of larch plantation declined with the increase of stand age. In order to improve soil fertility, regulation of stand structure by thinning and reasonable fertilization should be applied.

Key words: environmental efficiency, carbon emission, SBM model, , Western China.

曾凡鹏1,2,迟光宇1*,陈欣1,史奕1. 辽东山区不同林龄落叶松人工林土壤-根系C∶N∶P生态化学计量特征[J]. 生态学杂志.

ZENG Fan-peng1,2, CHI Guang-yu1*, CHEN Xin1, SHI Yi1. The stoichiometric characteristics of C, N and P in soil and root of larch (Larix spp.) plantation at different stand ages in mountainous region of eastern Liaoning Province, China.[J]. cje.

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