| Effects of planting years of navel orange on soil physical and chemical properties in red soil hilly regions |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2026.01.14 |
| Key Words: navel oranges orchard age soil nutrients soil acidification red soil hilly region |
| Author Name | Affiliation | | HU You | Jiangxi Academy of Water Science and Engineering, Nanchang, Jiangxi 330029, China
Jiangxi Provincial Technology Innovation Center for Ecological Water Engineering in Poyang Lake Basin, Nanchang, Jiangxi 330029, China
Jiangxi Key Laboratory of Watershed Soil and Water Conservation, Nanchang, Jiangxi 330029, China | | TANG Chongjun | Jiangxi Academy of Water Science and Engineering, Nanchang, Jiangxi 330029, China
Jiangxi Provincial Technology Innovation Center for Ecological Water Engineering in Poyang Lake Basin, Nanchang, Jiangxi 330029, China
Jiangxi Key Laboratory of Watershed Soil and Water Conservation, Nanchang, Jiangxi 330029, China | | ZHU Jinjin | Jiangxi Academy of Water Science and Engineering, Nanchang, Jiangxi 330029, China
Jiangxi Provincial Technology Innovation Center for Ecological Water Engineering in Poyang Lake Basin, Nanchang, Jiangxi 330029, China
Jiangxi Key Laboratory of Watershed Soil and Water Conservation, Nanchang, Jiangxi 330029, China | | LIU Yu | Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China |
|
| Hits: 715 |
| Download times: 94 |
| Abstract: |
| To systematically clarify the influence of navel orange orchard planting duration on soil physicochemical properties of red soil hilly region, this study was conducted in the Fangtai Watershed of Xingguo County, Jiangxi Province. Orchards with planting durations of 3 years (3 a), 5 years (5 a), and 7 years (7 a) were selected, with adjacent natural forest land serving as a control. Through stratified sampling of the 0-100 cm soil layer, variations in soil pH, organic matter (OM), organic carbon (OC), total nitrogen (TN), total phosphorus (TP), total potassium (TK), ammonium nitrogen (NH+4-N), nitrate nitrogen (NO-3-N), available phosphorus (AP), available potassium (AK), and particle size composition in orchards of different durations were analyzed. The results showed that: (1) Soil pH value in woodland increased with the increase of soil depth, while it decreased in orchards, with the most significant acidification observed in the deep soil layer (0.7-1.0 m) of 5 a orchards, indicating a risk of deep\|layer acidification during the orchard management phase. (2) With increasing planting duration, OM, OC, TN, TP, and AP contents were significantly enriched in the surface soil (0-0.1 m) of 7 a orchards, reaching 1.77 to 70.94 times the levels in woodland, while NO-3-N and AK contents significantly increased in deep soil, indicating risks of nutrient leaching and downward movement. (3) Although changes in soil particle size composition across different orchard ages were not significant, clay content showed slight recovery with increasing planting duration, and sand content gradually decreased, suggesting that long\|term cultivation is conducive to improving soil structure stability. The study demonstrates that long\|term orchard management promotes soil surface nutrient accumulation and soil structure recovery but also triggers risks of deep\|layer acidification and nitrogen leaching. To achieve sustainable orchard utilization in the red soil hilly region, stratified soil management strategies should be implemented at different developmental stages, including optimized fertilization and irrigation systems, along with enhanced soil and water conservation and improvement measures, to enhance soil quality and ecological security. |
|
|
|