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| 广西土壤有机质空间变异特征及其影响因素研究 | |
| 引用本文： | 钟聪,李小洁,何园燕,邱微文,李杰,张新英,胡宝清.广西土壤有机质空间变异特征及其影响因素研究[J].地理科学,2020,40(3):478-485. |
| 作者姓名： | 钟聪 李小洁 何园燕 邱微文 李杰 张新英 胡宝清 |
| 作者单位： | 南宁师范大学北部湾环境演变与资源利用教育部重点实验室/广西地表过程与智能模拟重点实验室,广西 南宁530001 南宁师范大学地理与海洋研究院,广西 南宁 530001 南宁师范大学地理科学与规划学院,广西 南宁 530001 广西壮族自治区地质调查院,广西 南宁 530023 |
| 基金项目： | 国家自然科学基金项目(41867049);广西自然科学基金项目(2016GXNSFBA380106);广西自然科学基金项目(2018GXNSFAA281263);国家重点研发计划资助(2016YFC0502401) |
| 摘 要： | 基于广西第二次土壤普查的270个土壤剖面资料,结合1∶50万数字化土壤类型图、土地利用类型图和气象监测数据等资料,利用地统计学和逐步回归分析等方法对广西表层土壤有机质空间变异特征及其影响因素进行了探究。结果表明：广西表层土壤有机质平均含量为3.11±2.19%,变异系数为70.72%,空间分布呈北高南低的趋势。广西表层土壤有机质空间分布受到自然和人为因素的共同影响,土壤类型、成土母质、海拔、土地利用、气候和坡度6个环境因子对全区土壤有机质含量变异的综合解释能力为47.9%。其中,土壤类型是最重要的影响因素,能独立解释其变异的36.0%,海拔和成土母质分别能独立解释28.5%和15.8%。气温对广西土壤有机质空间分布的影响比降水量更加显著,从而造成了广西土壤有机质整体呈南低北高的趋势。同时,土壤有机质对气温的敏感性在一定程度上受到降雨量的制约。此外,研究区农业耕作管理等因素对土壤有机质的影响也不容忽视。 |
| 关 键 词： | 土壤有机质 广西 地统计学 逐步回归分析 |
| 收稿时间： | 2019-05-09 |
| 修稿时间： | 2019-08-13 |
Spatial Variation of Soil Organic Matter and Its Influencing Factors in Guangxi,China |
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| Zhong Cong,Li Xiaojie,He Yuanyan,Qiu Weiwen,Li Jie,Zhang Xinying,Hu Baoqing.Spatial Variation of Soil Organic Matter and Its Influencing Factors in Guangxi,China[J].Scientia Geographica Sinica,2020,40(3):478-485. | |
| Authors: | Zhong Cong Li Xiaojie He Yuanyan Qiu Weiwen Li Jie Zhang Xinying Hu Baoqing |
| Abstract: | Based on the 270 soil profile data of the second soil investigation of Guangxi, the digitized soil type map (1∶500 000), the map of land use types, and the meteorological monitoring data of Guangxi, geostatistical methods and stepwise regression analysis were applied to analyze the spatial variation of soil organic matter and its influencing factors in Guangxi, China. Results showed that the soil organic matter in Guangxi was higher in the north but lower in the south, with an average of 3.11±2.19% and a coefficient of variation of 70.72%. Spatial distribution of soil organic matter is affected by both natural and anthropogenic factors. The comprehensive interpretation ability of six environmental factors to the variation of soil organic matter content is 47.9%. Soil type is the main influencing factor, which can explain 36.0% of the variation, independently. Altitude and soil parent material can explain 28.5% and 15.8%, respectively. Caused by that the effect of temperature on soil organic matter is greater than that of precipitation in Guangxi, spatial distribution of soil organic matter is displayed a trend of lower in the south but higher in the north of Guangxi. At the same time, sensitivity of soil organic matter to temperature was restricted by precipitation. In addition, there were also factors, such as agricultural farming management, which lead to the increase of soil organic matter in the study area. |
| Keywords: | soil organic matter Guangxi geo-statistics stepwise regression analysis |
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