不同空间范围土壤色度的纬向变化特征及其气候意义
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作者单位:

1.福建师范大学湿润亚热带山地生态国家重点实验室培育基地,福州350007;2.福建师范大学地理科学学院,福州 350007;3.福建师范大学地理研究所,福州350007

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基金项目:

国家自然科学基金项目(41877435,41772180 和41402149)和福建师范大学创新团队项目(IRTL1705)


Latitudinal Variation Characteristics of Soil Color in Different Spatial Extents and Their Climatic Significance
Author:
Affiliation:

1. State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou 350007, China;2. School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China;3. Institute of Geography, Fujian Normal University, Fuzhou 350007, China

Fund Project:

National Natural Science Foundation of China (Nos. 41877435, 41772180, 41402149) and Innovation Research Team Fund of Fujian Normal University (No. IRTL1705)

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    摘要:

    对不同气候条件下发育的土壤/古土壤进行色度分析,探讨其色度参数的空间变化规律及其作为气候变化代用指标的可靠性。结果表明:(1)较小的空间尺度上,土壤色度参数变化复杂,与气候相关关系不显著。土壤色度参数在大空间尺度中均表现出一定的纬向变化,红度(a*)随纬度的增加而降低,黄度(b*)与纬度的拟合曲线趋近于开口向上的抛物线,黄度与红度的比值(b*/a*)随着纬度的增加近似呈线性增加。(2)土壤剖面色度参数均与气候因子(年均降水和年均温)具有一定的相关关系,b*/a*与年均温相关系数最大。色度参数a*与年均降水相关系数稍高于b*/a*,但a*易受其他因素影响;而土壤色度参数b*/a*对土壤颜色的空间变化敏感,是指示气候变化的适用指标。

    Abstract:

    [Objective] This study was intended to explore spatial variation of soil color parameters and reliability of the parameter being used as an alternative indicator of climate change. [Method] In this study, color analysis of the soils developed under different climatic conditions was carried out. The soil profiles studied in this paper were scattered in the range geographically from 23.79°N to 64.72°N, and from 38.52°E to 148.45°W, striding across the low latitude, mid-latitude and high latitude. Among the total of 32 soil profiles, 9 had data derived from the literature and the remaining 23 sections were collected from Fujian, the Ganzi Tibetan Autonomous Prefecture in the West Sichuan Plateau, Siberian of Russia, and Alaska of the USA. The soil profiles were distributed one each in Zhao'an, Yunxiao, Changtai, Hui'an, Putian, Fuqing, Zhangping, Quanzhou, Changting, Ninghua, Lianjiang, Minqing, Shaxian, Mingxi, Ningde, Taining, Jian'ou, Zhenghe, Songxi, Wuyishan, the Ganzi Tibetan Autonomous Prefecture, Siberian of Russia, and central Alaska. As the soil profiles were distributed extensively in such a huge region, they divesified greatly in soil type, and developed separately in a huge variety of climatic conditions, including humid subtropical climate, temperate continental climate and Qinghai-Tibet Plateau climate, etc., which differed sharply in annual mean precipitation and annual mean temperature. [Result] Results show: (1) on a small spatial scale, soil color parameters are complex in variation and not so significantly related to climate, while on a large spatial scale, soil color parameters exhibit a certain trend of varying with latitude. Redness (a*) of the soils declines with increasing latitude, while yellowness (b*) does a fitting curve with latitude quite similar to a parabola with an upward opening. The ratio of yellowness to redness (b*/a*) increases approximate linearly with increasing latitude;(2) Color parameters of the soil profiles are more or less related to climatic factors (annual mean precipitation and annual mean temperature); the coorelation coefficient of b*/a* with annual mean temperature is the highest. The coorelation coefficient of a* with annual mean precipitation is slightly higher than that of b*/a*, but a* is more likely to be affected by other factors. [Conclusion] Therefore, the soil chroma parameter b*/a* is quite sensitive to spatial variation of soil color, so is a suitable indicator of climate changes.

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郑兴芬,吕 镔,陈梓炫,刘 鑫.不同空间范围土壤色度的纬向变化特征及其气候意义[J].土壤学报,2020,57(5):1186-1196. DOI:10.11766/trxb201905040180 ZHENG Xingfen, Lü Bin, CHEN Zixuan, LIU Xin. Latitudinal Variation Characteristics of Soil Color in Different Spatial Extents and Their Climatic Significance[J]. Acta Pedologica Sinica,2020,57(5):1186-1196.

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历史
  • 收稿日期:2019-04-08
  • 最后修改日期:2019-08-14
  • 录用日期:2019-09-17
  • 在线发布日期: 2020-06-30
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