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通过长期定位试验,探讨了20年不施肥(CK)、单施化肥(NPK)、秸秆和化肥配施(SNPK)、常量有机肥和化肥配施(M1NPK)以及高量有机肥和化肥配施(M2NPK)5个施肥处理对(土娄)土中黑碳含量及积累的影响。结果表明:与CK处理相比,NKP处理对黑碳含量和积累没有明显影响;有机肥和化肥配施(M1NPK、M2NPK)对耕层(0—20 cm)土壤黑碳含量的影响较大,与CK处理相比,在土壤表层(0—5 cm),M1NPK、M2NPK分别提高了黑碳含量的108%和134%,5—10 cm土层中黑碳含量增幅最高,分别提高164%和176%,在整个土层,M1NPK、M2NPK处理分别增加了1.51和1.55倍;秸秆和化肥配施(SNPK)下表层黑碳含量也有所增加,但增加幅度相对施用有机肥来说明明显较小。施肥对黑碳含量的影响主要发生在土壤表层,深层土壤黑碳受施肥影响较小。
Through long-term experiment, the effects of non-fertilization (CK), single fertilizer (NPK), straw and fertilizer combination (SNPK), constant organic fertilizer and chemical fertilization (M1NPK) and high amount of organic manure Effect of Five Fertilization Treatments on Black Carbon Content and Accumulation in. The results showed that compared with CK treatment, NKP treatment had no obvious effect on black carbon content and accumulation; M1NPK and M2NPK had a significant impact on black carbon content in topsoil (0-20 cm) soil, Compared with CK treatment, M1NPK and M2NPK increased the content of black carbon by 108% and 134% respectively in the soil surface (0-5 cm), and increased by 164% and 5-10% respectively 176%, and the M1NPK and M2NPK treatments increased 1.51 and 1.55 times respectively in the whole soil layer. The content of black carbon in the surface layer under straw and chemical fertilizer application (SNPK) also increased, but the increase range was obviously smaller than that of organic manure. The effect of fertilization on black carbon content mainly occurred on the soil surface, while the deep soil black carbon was less affected by fertilization.