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| Characteristics and comprehensive evaluation of soil nutrients in facility farmland in Qinghai Province |
| Received:July 11, 2025 |
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| KeyWord:facility farmland;geostatistics;comprehensive evaluation of soil nutrients;GIS |
| Author Name | Affiliation | E-mail | | CAO Yiyun | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China | | | SONG Mingdan | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
Xining Integrated Field Scientific Observation and Research Station of the Ministry of Agriculture and Rural Affairs, Xining 810016, China | | | Talingewa | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
Xining Integrated Field Scientific Observation and Research Station of the Ministry of Agriculture and Rural Affairs, Xining 810016, China | | | WANG Hui | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China | | | WANG Xiaomei | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China | | | ZHOU Zizhe | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China | | | CHEN Yao | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China | | | FU Jiaojiao | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China | | | LI Yuemei | Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
Xining Integrated Field Scientific Observation and Research Station of the Ministry of Agriculture and Rural Affairs, Xining 810016, China | yuemeili2002@hotmail.com |
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| Abstract: |
| This study aimed to examine the soil nutrient status, spatial distribution characteristics, and driving factors of changes in facility farmland in Qinghai Province, providing scientific support for optimizing plateau facility farmland management. Using 733 surface soil samples（0-20 cm）from concentrated facility farmland areas, combined with statistical and spatial analysis, the research explored countyscale soil nutrient heterogeneity, comprehensive nutrient status, and their driving factors. Results indicated high soil pH, low organic matter and total nitrogen, but elevated levels of total phosphorus, total potassium, alkali-hydrolyzable nitrogen, available phosphorus, and available potassium, with significant nutrient imbalances particularly excessive total phosphorus. The comprehensive nutrient score showed a northeast-high and southwest-low pattern, strongly correlated with annual GDP. Spatial analysis revealed distinct aggregation：low values of organic matter, total nitrogen, and alkali-hydrolyzable nitrogen concentrated in Jianzha and Guide, while high values occurred in Ledu, Xining, and Datong, with pH showing an opposite distribution. The findings demonstrate that Qinghai's facility farmland soil nutrients exhibit significant spatial patterns influenced by both environmental factors and human management, providing a basis for developing region-specific soil management strategies. |
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