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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Phosphorus distribution and sorption-release characteristics of the soil from newly submerged areas in the Danjiangkou reservoir, China
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Phosphorus distribution and sorption-release characteristics of the soil from newly submerged areas in the Danjiangkou reservoir, China

机译：丹江口水库新淹没区土壤的磷分布及吸附释放特征

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摘要

The phosphorus (P) distribution and sorption-release characteristics of the surface soil in new submerged areas from the Danjiangkou Reservoir were investigated, and assessed the potential risk of P released from the soils. The results indicated that the TP (total phosphorus) contents in the soils varied from 161.01 mg/kg to 1150.94 mg/kg, and the mean content value of TP was the highest in arable land (732.91 mg/kg), especially distributed in arable land above 160 m elevation; Calcium bound phosphorus (HCl-P) was the major fraction of TP, the proportion was ranged from 60.77% to 83.38% for different land using types; the highest proportion of OP (organic phosphorus) was 32.07% in grass land soils. For all the samples, the rank order P-fractions was HCl-P > OP > NaOH-P (Phosphorus bound to Al and Fe oxides). Besides, the contents of TP correlated significantly with the HCl-P contents, (r = 0.936, P < 0.01), NaOH-P contents (r = 0.661, P < 0.01), OP contents (r = 0.762, P < 0.01), and IP contents (r = 0.970, P < 0.01), but OP contents was no significantly correlated with HCl-P, NaOH-P contents. The sorption capacity of soil ranged from 578.79 to 1457.44 mg/kg, and the amount of P released from the soils were ranged from 0.635 to 5.957 mg/kg; however, due to the concentration of P in the overlying water, about 80% of the newly submerged area would act as sink of P. (C) 2016 Elsevier B.V. All rights reserved.
机译：研究了丹江口储层新埋地区表面土壤的磷（P）分布和吸附释放特性，评估了土壤中释放的P的潜在风险。结果表明，土壤中的TP（总磷）含量从161.01mg / kg变化至1150.94mg / kg，TP的平均含量值是耕地（732.91mg / kg）中最高，特别是在耕地中分布陆地上涨160米升;钙结合的磷（HCl-P）是TP的主要部分，使用类型的不同土地的比例为60.77％至83.38％;草地土壤中，OP（有机磷）的比例最高为32.07％。对于所有样品，等级阶P-级分是HCl-P> NaOH-P（与Al和Fe氧化物结合的磷）。此外，TP的含量显着与HCl-P含量显着相关，（R = 0.936，P <0.01），NaOH-P含量（r = 0.661，P <0.01），OP内容（r = 0.762，P <0.01）和IP内容（R = 0.970，P <0.01），但OP内容物与HCl-P，NaOH-P含量无明显相关。土壤的吸收能力范围为578.79至1457.44 mg / kg，从土壤中释放的p量为0.635至5.957 mg / kg;然而，由于覆盖水中P的浓度，约80％的新淹没区域将充当P.（c）2016年elsevier b.v.保留所有权利。

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