| 栗钙土碳酸钙含量的空间分布特征 |
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| 引用本文： | 李品芳,白海峰,郭世文,杨娇燕.栗钙土碳酸钙含量的空间分布特征[J].土壤学报,2014,51(2):402-406. |
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| 作者姓名： | 李品芳 白海峰 郭世文 杨娇燕 |
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| 作者单位： | 中国农业大学资源与环境学院,中国农业大学资源与环境学院,中国农业大学资源与环境学院,中国农业大学资源与环境学院 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）;国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | <正>土壤碳酸盐含量是土壤性质的一个重要指标。土壤中碳酸盐含量多少直接影响土壤团粒的形成和土壤发育以及土壤养分的存在形态和有效性,反映了土壤的环境质量1]。以碳酸盐为主要存在形态的土壤无机碳库在全球陆地碳循环中占有重要地位,全球土壤无机碳库量约700~1 000 Pg2],我3]
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| 关 键 词： | 栗钙土 土壤碳酸钙 空间分布 地统计学 |
| 收稿时间： | 2013/6/26 0:00:00 |
| 修稿时间： | 2013/10/17 0:00:00 |
Spatial distribution features of CaCO3 content in chestnut soil |
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| Li Pinfang,Bai Haifeng,Guo Shiwen and Yang Jiaoyan.Spatial distribution features of CaCO3 content in chestnut soil[J].Acta Pedologica Sinica,2014,51(2):402-406. |
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| Authors: | Li Pinfang Bai Haifeng Guo Shiwen and Yang Jiaoyan |
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| Institution: | College of Resources and Environment,Key Laboratory of Soil Science and Water,Ministry of Agriculture,Key Laboratory of Soil-Plant Interaction,Ministry of Education,China Agricultural University,College of Resources and Environment,Key Laboratory of Soil Science and Water,Ministry of Agriculture,Key Laboratory of Soil-Plant Interaction,Ministry of Education,China Agricultural University,College of Resources and Environment,Key Laboratory of Soil Science and Water,Ministry of Agriculture,Key Laboratory of Soil-Plant Interaction,Ministry of Education,China Agricultural University,College of Resources and Environment,Key Laboratory of Soil Science and Water,Ministry of Agriculture,Key Laboratory of Soil-Plant Interaction,Ministry of Education,China Agricultural University |
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| Abstract: | In this paper, in order to study the spatial distribution characteristics of CaCO3 contents of chestnut soil in the arid and semiarid region, we chose a plot of 700 × 900 m2 in the Arid Agriculture Experimental Station of Wu Chuan in Inner Mongolia to serve as the study area. There were 80 soil profiles were undertaken. We measured CaCO3 contents, and the spatial variability of CaCO3 contents were analyzed by geostatistical method. The results showed that the mean of calcium carbonate content was 60.7 g kg-1, and the maximum was 429.3 g kg-1. In calcic horizon, the mean of CaCO3 was 108.1 g kg-1. The variable coefficient of the calcium carbonate content of calcic horizon was 0.49, which belonged to medium variation degree. In the study area, there were 57.7% of the thickness of calcic horizon was 20-40 cm. For all of soil profiles, the variable coefficient of the calcium carbonate contents were between 0.91-1.50, that it belonged to medium or strong variation degree. Analysis results of the spatial variability of CaCO3 contents showed, the humus horizon composited the spherical model, and the transition horizon and calcic horizon composited index model, but the parent material performed for the pure nugget effect. The calcium carbonate of humus horizon was moderate intensity spatial correlation, and the transition horizon and calcic horizon were weak spatial correlation. The spatial distribution of calcium carbonate in the transition horizon and Calcic horizon is similarity. The depths of calcic horizons were between 12 cm and 90 cm, and the mean was 48.0 cm, which belonged to index model, and its spatial correlation was weak. |
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| Keywords: | Chestnut soil CaCO3 content Spatial distribution Geostatistics |
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