菲在长期施肥黑土团聚体中的老化行为

在东北黑土区长期肥料试验定位监测田采集化肥与有机肥配施（NPOM）、不施肥（NF）]的表层（0～20 cm）土壤样品,用室内模拟培养的方法研究了菲在黑土及其不同粒径团聚体中的老化行为及其影响因素的溯源分析.结果表明,老化前期〉2 mm粒径组团聚体是优先吸附剂,而老化后期〈0.053 mm粒径组的团聚体是优先吸附剂.在...

Long-Term Fertilization on the Behavior of Aging of the Phenanthrene in the Black Soil Aggregates

The soil samples were collected from the surface (0-20 cm) soil of the long-term fertilizer experiments in black soil areas in Northeast Location Monitoring Field fertilizers and organic fertilizers (NPOM), no fertilization (NF)], and indoor culture method was adopted to study the behaviour of aging of the phenanthrene different size of soil aggregates and its contributing factors of aging source analysis. The results show that in the beginning of the aging > 2 mm aggregate fraction was a priority adsorbent, while last stage of the aging < 0.053 mm aggregate fraction was the preferred adsorbent. In the 120-day aging period, the extraction rate of 0.25-0.053 mm and 0.25-2 mm aggregate fraction had no significant difference. The phenanthrene residual content in undisturbed soil of NPOM treatment was 31.13%, while in the NF treatment residual content of undisturbed soil was 27.73%. Average rates of the phenanthrene aging in the NPOM and NF treatments was 0.26% x d(-1) and 0.23% x d(-1). The five major influence factors of the combination of content of the residual phenanthrene based on principal component analysis were analyzed, the results showed that the organic carbon and specific surface area were the mainly factors combined with residual content of phenanthrene. As a consequence, Long-term application of fertilizers was in favour of the aging behaviour of phenanthrene, thereby reducing the activity and toxicity of phenanthrene in the black soil.