The Controlling Factors of Soil Selenium Content in a Selenium-Deficient Area in Southwest China
Selenium (Se) is a beneficial microelement for humans, and its varying abundances and shortages have attracted widespread concern. The accumulation process of soil Se is quite complicated, being controlled by multiple factors. However, the influence mechanism of soil properties, climate, and topogra...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/13/4/1031 |
| _version_ | 1797606818602549248 |
|---|---|
| author | He-Shuang Wan Wei-Chun Zhang Wei Wu Hong-Bin Liu |
| author_facet | He-Shuang Wan Wei-Chun Zhang Wei Wu Hong-Bin Liu |
| author_sort | He-Shuang Wan |
| collection | DOAJ |
| description | Selenium (Se) is a beneficial microelement for humans, and its varying abundances and shortages have attracted widespread concern. The accumulation process of soil Se is quite complicated, being controlled by multiple factors. However, the influence mechanism of soil properties, climate, and topographic conditions on Se distribution is still unclear in Se-deficient areas. For this study, we collected 2804 samples from cropland soil to assess the levels of Se and the factors that influence those levels in Se-deficient areas of southwestern China. The Se content in this area (0.17 mg/kg) was less than the mean value of China as a whole (0.29 mg/kg). Moran’s I index and a random forest (RF) model showed that higher Se levels were mostly observed in the southern and northern sections of the area we studied. The RF model had excellent performance in predicting soil Se content, with an accuracy of 64%. The use of Shapley additive explanations indicated that soil organic matter (SOM) and mean annual precipitation (MAP) were the critical factors determining Se distribution. The areas with high SOM and MAP showed high Se levels. The information obtained from this work can provide guidance for agricultural planning in Se-deficient areas. |
| first_indexed | 2024-03-11T05:20:23Z |
| format | Article |
| id | doaj.art-e68b69c6c8164fe78083e9bad660ca44 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-11T05:20:23Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-e68b69c6c8164fe78083e9bad660ca442023-11-17T17:56:35ZengMDPI AGAgronomy2073-43952023-03-01134103110.3390/agronomy13041031The Controlling Factors of Soil Selenium Content in a Selenium-Deficient Area in Southwest ChinaHe-Shuang Wan0Wei-Chun Zhang1Wei Wu2Hong-Bin Liu3College of Resources and Environment, Southwest University, Beibei, Chongqing 400715, ChinaCollege of Resources and Environment, Southwest University, Beibei, Chongqing 400715, ChinaCollege of Computer and Information Science, Southwest University, Beibei, Chongqing 400715, ChinaCollege of Resources and Environment, Southwest University, Beibei, Chongqing 400715, ChinaSelenium (Se) is a beneficial microelement for humans, and its varying abundances and shortages have attracted widespread concern. The accumulation process of soil Se is quite complicated, being controlled by multiple factors. However, the influence mechanism of soil properties, climate, and topographic conditions on Se distribution is still unclear in Se-deficient areas. For this study, we collected 2804 samples from cropland soil to assess the levels of Se and the factors that influence those levels in Se-deficient areas of southwestern China. The Se content in this area (0.17 mg/kg) was less than the mean value of China as a whole (0.29 mg/kg). Moran’s I index and a random forest (RF) model showed that higher Se levels were mostly observed in the southern and northern sections of the area we studied. The RF model had excellent performance in predicting soil Se content, with an accuracy of 64%. The use of Shapley additive explanations indicated that soil organic matter (SOM) and mean annual precipitation (MAP) were the critical factors determining Se distribution. The areas with high SOM and MAP showed high Se levels. The information obtained from this work can provide guidance for agricultural planning in Se-deficient areas.https://www.mdpi.com/2073-4395/13/4/1031selenium deficiencysoil organic mattermean annual precipitationcomplex networkrandom forest (RF)Shapley additive explanations (SHAP) |
| spellingShingle | He-Shuang Wan Wei-Chun Zhang Wei Wu Hong-Bin Liu The Controlling Factors of Soil Selenium Content in a Selenium-Deficient Area in Southwest China Agronomy selenium deficiency soil organic matter mean annual precipitation complex network random forest (RF) Shapley additive explanations (SHAP) |
| title | The Controlling Factors of Soil Selenium Content in a Selenium-Deficient Area in Southwest China |
| title_full | The Controlling Factors of Soil Selenium Content in a Selenium-Deficient Area in Southwest China |
| title_fullStr | The Controlling Factors of Soil Selenium Content in a Selenium-Deficient Area in Southwest China |
| title_full_unstemmed | The Controlling Factors of Soil Selenium Content in a Selenium-Deficient Area in Southwest China |
| title_short | The Controlling Factors of Soil Selenium Content in a Selenium-Deficient Area in Southwest China |
| title_sort | controlling factors of soil selenium content in a selenium deficient area in southwest china |
| topic | selenium deficiency soil organic matter mean annual precipitation complex network random forest (RF) Shapley additive explanations (SHAP) |
| url | https://www.mdpi.com/2073-4395/13/4/1031 |
| work_keys_str_mv | AT heshuangwan thecontrollingfactorsofsoilseleniumcontentinaseleniumdeficientareainsouthwestchina AT weichunzhang thecontrollingfactorsofsoilseleniumcontentinaseleniumdeficientareainsouthwestchina AT weiwu thecontrollingfactorsofsoilseleniumcontentinaseleniumdeficientareainsouthwestchina AT hongbinliu thecontrollingfactorsofsoilseleniumcontentinaseleniumdeficientareainsouthwestchina AT heshuangwan controllingfactorsofsoilseleniumcontentinaseleniumdeficientareainsouthwestchina AT weichunzhang controllingfactorsofsoilseleniumcontentinaseleniumdeficientareainsouthwestchina AT weiwu controllingfactorsofsoilseleniumcontentinaseleniumdeficientareainsouthwestchina AT hongbinliu controllingfactorsofsoilseleniumcontentinaseleniumdeficientareainsouthwestchina |