| Effects of long\|term plastic film mulching combined with organic fertilizer application on soil physicochemical properties in potato fields of semi\|arid areas |
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| DOI：10.7606/j.issn.1000-7601.2026.04.08 |
| Key Words: potato farmland long\|term positioning experiment plastic film mulching organic fertilizers soil physicochemical properties semi\|arid area |
| Author Name | Affiliation | | CHEN Hong | College of Resource and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Institute of Dryland Agriculture, Gansu Academy of Agricultural Science, Gansu Key Laboratory of Efficient Water Resource Utilization in Dryland Areas, Ministry of Agriculture and Rural Affairs Key Laboratory of Green and Low\|Carbon Agriculture in Northwest Dryland, Lanzhou, Gansu 730070, China | | ZHANG Pingliang | College of Resource and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Institute of Dryland Agriculture, Gansu Academy of Agricultural Science, Gansu Key Laboratory of Efficient Water Resource Utilization in Dryland Areas, Ministry of Agriculture and Rural Affairs Key Laboratory of Green and Low\|Carbon Agriculture in Northwest Dryland, Lanzhou, Gansu 730070, China | | JIAO Zijian | College of Resource and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Xiaowei | Institute of Dryland Agriculture, Gansu Academy of Agricultural Science, Gansu Key Laboratory of Efficient Water Resource Utilization in Dryland Areas, Ministry of Agriculture and Rural Affairs Key Laboratory of Green and Low\|Carbon Agriculture in Northwest Dryland, Lanzhou, Gansu 730070, China | | YANG Sicun | Institute of Dryland Agriculture, Gansu Academy of Agricultural Science, Gansu Key Laboratory of Efficient Water Resource Utilization in Dryland Areas, Ministry of Agriculture and Rural Affairs Key Laboratory of Green and Low\|Carbon Agriculture in Northwest Dryland, Lanzhou, Gansu 730070, China | | TAN Xuelian | Institute of Dryland Agriculture, Gansu Academy of Agricultural Science, Gansu Key Laboratory of Efficient Water Resource Utilization in Dryland Areas, Ministry of Agriculture and Rural Affairs Key Laboratory of Green and Low\|Carbon Agriculture in Northwest Dryland, Lanzhou, Gansu 730070, China |
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| Abstract: |
| To investigate the effects of long\|term film mulching combined with organic manure application on soil physicochemical properties of potato farmland in a semi\|arid area, based on the 10-year continuous positioning experiment in the loessial soil area of the National Soil Quality Anding Observation and Experimental Station, two mulching methods of full\|mulch ridge planting (F) and flat planting without mulching (L) were set up, and four fertilization treatments of no fertilizer (CK), chemical fertilizer alone (NPK), organic manure alone (OM), and combined chemical fertilizer and organic manure (NPKM) were combined to analyze the changes of soil physical structure, nutrients, and pH. The results showed that long\|term application of organic fertilizer (NPKM, OM) significantly decreased soil bulk density by 4.2%-18.8%, and increased total porosity by 3.6%-18.4% in 0-30 cm soil layer relative to NPK, with full\|mulch ridge planting outperforming flat planting without mulching. Single chemical fertilizer application exerted no soil amelioration effect. NPKM treatment significantly enhanced soil total and available nutrient contents. Under full\|mulch ridge planting, NPKM increased alkali\|hydrolyzable nitrogen, available phosphorus, and available potassium by 80.1%, 151.8%, and 170.3%, respectively, and total nitrogen and total phosphorus by 30.6% and 16.4% compared with NPK. Under film mulching, the pH value of NPK treatment was the lowest, which was significantly lower than that of organic manure\|amended treatments. Organic manure application effectively buffered soil acidification under film mulching conditions. Interaction analysis indicated that fertilization was the dominant factor affecting soil physicochemical properties. Film mulching only activated soil phosphorus, and the available phosphorus content of F-OM was 26.0% higher than that of L-OM. A significant interaction between mulching method and fertilization was only detected for soil pH. In conclusion, full\|mulch ridge planting combined with chemical fertilizer and organic manure can synergistically improve topsoil physical structure and enhance nutrient storage and supply capacity in the loessal soil of potato farmland in the semi\|arid area of Northwest China, representing a suitable technical measure for sustainable soil management in this area. |
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