从化区农田耕层土壤有效硅空间分布及影响因素

Spatial distribution and influencing factors of soil available silicon in farmland cultivated layers in Conghua District

为探究广州市从化区农田土壤有效硅空间分布及影响因素,以期为促进我国粮食主产区水稻产量增长提供科学依据和参考,采用描述性统计、地统计学、相关性分析与GIS(地理信息系统)技术结合的方法对从化区土壤有效硅开展研究。结果表明,研究区土壤有效硅平均含量为60.31 mg·kg^(-1),总体偏低,并呈现中度变异;在中心区域、粮食主产区和丘陵地带,土壤有效硅含量较高;有效硅含量与土壤pH、有机质含量、黏粒含量呈正相关,土地利用方式、成土母质对其也有显著影响。研究表明,在所考虑的影响因素中,成土母质对从化区农田土壤有效硅的影响程度居于首位。

To explore the spatial distribution and influencing factors of available silicon in agricultural soils in Conghua District,Guangzhou City, with a view of providing scientific basis and reference for promoting the growth of rice yield in the main grain-producing areas of China, descriptive statistics, geostatistics, correlation analysis and GIS technology were used to study the soil available silicon in Conghua District. The results showed that the average content of soil available silicon in the study area was 60.31 mg·kg^(-1), which was generally low and showed moderate variation;in the central area, main grain production areas and hilly areas, the soil available silicon content was relatively high;the effective silicon content was positively correlated with soil pH, organic matter content, and clay content. The land use patterns and soil parent materials also had a significant impact. The study shows that the parent material is the most important among the factors considered.