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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Environmental factors influencing spatial variability of soil total phosphorus content in a small watershed in Poyang Lake Plain under different levels of soil erosion
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Environmental factors influencing spatial variability of soil total phosphorus content in a small watershed in Poyang Lake Plain under different levels of soil erosion

机译：不同水平土壤侵蚀下鄱阳湖平原小流域土壤总磷含量空间变异的环境因素

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摘要

Soil erosion can change the migration and deposition patterns of soil particles and alter the regional geographic environment; therefore, it plays an important role in the biogeochemical cycle of soil total phosphorus (STP). Quantifying the influence of environmental factors on STP content under soil erosion is critical for understanding the lateral transfer of STP from soil. Here, we explored the influence of environmental factors on STP content under different levels of soil erosion in the small watershed of Nanliao River, a tributary of Xiu River in the western part of Poyang Lake Plain in Jiangxi Province, China. Soil erosion ranged from 0 to 176.26 t hm(-2) a(-1) (15.41 t hm(-2) a(-1) on average) across the watershed in 2018, indicating a mild erosion level on the whole. The STP content varied between 0.06 and 1.19 g/kg (0.6 g/kg on average) with a coefficient of variation of 43.33%, indicating moderate variation. An exponential model with a small nugget effect (7.35%) and a small range (2.25 km) could estimate 86.5% of spatial variability in STP content. The STP content showed a strong spatial autocorrelation, and the soil rich in STP was mostly distributed along the Nanliao River. There was a negative correlation between STP content and soil erosion (r = -0.149, P < 0.01). Each of the 10 selected environmental factors could explain 2.7-21.3% of spatial variability in STP content. Elevation, soil particle size, soil pH, and their interactions with other factors were the main factors influencing STP content, although their influence differed across various erosion levels. This study could provide useful data for controlling STP loss and reducing the impacts of soil erosion on the ecological environment in the Poyang Lake Plain.
机译：土壤侵蚀可以改变土壤颗粒的迁移和沉积模式，改变区域地理环境;因此，它在土壤总磷（STP）的生物地理细胞循环中起着重要作用。量化环境因素对土壤侵蚀下STP含量的影响对于了解土壤中STP的横向转移至关重要。在这里，我们探讨了江西省鄱阳湖平原西部省秀河川北河南寮河小流域不同水土侵蚀下的环境因素对STP含量的影响。土壤侵蚀从0到176.26 T HM（-2）A（-1）（平均15.41小时（-2）A（-2）A（-1）），2018年，表明整体上的温和侵蚀水平。 STP含量在0.06和1.19g / kg（平均0.6g / kg）之间变化，变异系数43.33％，表明中等变化。具有小核效果的指数模型（7.35％）和小范围（2.25公里）可以估计STP含量的86.5％的空间变异性。 STP含量显示出强烈的空间自相关，富含STP的土壤大多沿南寮河分布。 STP含量与土壤侵蚀之间存在负相关（R = -0.149，P <0.01）。 10个选定的环境因素中的每一个都可以解释STP含量的2.7-21.3％的空间变异性。升高，土壤粒度，土壤pH值及其与其他因素的相互作用是影响STP含量的主要因素，尽管它们的影响在各种侵蚀水平差异不同。本研究可以提供控制STP损失的有用数据，并降低土壤侵蚀对鄱阳湖平原生态环境的影响。

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