Land use effects on soil phosphorus behavior characteristics in the eutrophic aquatic-terrestrial ecotone of Dianchi Lake, China
Land use effects on soil phosphorus behavior characteristics in the eutrophic aquatic-terrestrial ecotone of Dianchi Lake, China
复制标题
滇池富营养化水陆交错带土地利用对土壤磷行为特征的影响
DOI：
10.1016/j.still.2020.104793
复制
发表时间：
2021
影响因子：
6.5
通讯作者：
Jones Davey L
中科院分区：
文献类型：
--
作者：
Fu Denggao;Xu Zixuan;Wu Xiaoni;Zhao Luoqi;Zhu Anqi;Duan Changqun;Chadwick David R;Jones Davey L
越来越多的证据表明，土地利用对土壤磷循环有广泛的影响，这有助于植物生长和环境影响。磷库和磷行为特征是土壤养分循环和功能的潜在指示因子。研究了不同土地利用方式（农田和生态缓冲区）对土壤磷素组分（P、P活性磷、中度活性磷、有机磷、磷灰石磷和残留磷）以及富营养化水陆交错带三个采样点土壤磷的吸附-释放特征。此外，我们还确定了关键的土壤理化性质，显着相关的土壤磷组分和吸附释放特性。不同土地利用方式引起土壤磷组分和磷储量的变化。有机磷库在所有样点均表现出FL和BZ间的显著差异，其他磷库表现出位点特异性反应。缓冲带土壤对磷的缓冲能力（最大吸附量和磷饱和度）高于农田。此外，土壤缓冲能力与土壤活性磷呈显著正相关。这些结果表明，缓冲带在减少土壤磷流失方面可能起着磷库的作用。然而，高活性磷和极低的C：Poratios（<100）表明，该地区土壤中有效磷仍有大量积累，土壤磷流失风险仍然很高。土壤理化性质（土壤有机碳、全氮、交换性铁、铝浓度和pH）与土壤磷素形态和吸附释放特性密切相关。因此，我们认为，土壤磷组分（特别是活性磷，有机磷）和关键的土壤理化指标是有用的指标，评估不同的土地利用引起的湖泊富营养化水陆交错带的土壤磷的行为。
Growing evidence suggests that land use has widespread effects on soil phosphorus (P) cycling, which can contribute to plant growth and environmental impacts. P pool and P behavior characteristics have identified as potential indicators of soil nutrient cycling and functions. In this study, we investigated effects of different land-use types (farmland and ecological buffer zone) on soil P fractions (i.e., labile P, moderately labile P, organic P, apatite P, and residual P) and soil P sorption-release characteristics at three sampling sites in the eutrophic aquatic-terrestrial ecotone of Dianchi Lake, China. In addition, we also identified key soil physicochemical properties that were significantly related to soil P fractions and sorption-release characteristics. Different land use induced changes in soil P fractions and P stocks. Organic P pool showed a significant difference between FL and BZ in all sites and other P pools displayed the site-specific responses. Soils in buffer zone have higher P buffer capacity (higher maximum sorption capacity and lower degree of P saturation) in comparison with farmland. Moreover, soil buffer capacity was significantly correlated with soil labile P. These results suggest buffer zone in lakeside may act as sink of P in reducing soil P loss. However, higher labile P and very low C: Poratios (<100) in all soil samples indicate there is large amount of available P accumulated in soils and soil P loss risk in the aquatic-terrestrial ecotone is still high. Redundancy analysis results showed that the soil key physicochemical properties (soil organic carbon, total nitrogen, exchangeable Fe and Al concentration, and pH) were closely related to soil P fractions and sorption-release characteristics. Therefore, we conclude that soil P fractions (especially labile P, organic P) and key soil physicochemical indices are useful indicators for assessing the behavior of P in soils induced by different land use in the eutrophic aquatic-terrestrial ecotone of lakes.
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影响因子：
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作者：
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DOI：
10.5860/choice.31-3799
发表时间：
2013-01
期刊：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1016/j.agee.2011.02.011
发表时间：
2011-04
期刊：
Agriculture, Ecosystems & Environment
影响因子：
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作者：
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通讯作者：
D. Pizzeghello;A. Berti;S. Nardi;F. Morari
影响因子：
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作者：
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通讯作者：
Truesdale, VW