长期施肥对小麦玉米轮作系统的影响.docx

Long-term manure amendments and chemical fertilizers enhanced soil organic carbon sequestration in a wheat(Triticum aestivum L.)–maize(Zea mays L.)rotationsystem 长期粪肥修复和化肥增强了小麦（Triticum aestivum L.） - 玉米（Zea mays L.）轮作系统中的土壤有机碳吸收 Abstract BACKGROUND:The carbon sequestration potential is a?ected by cropping system and management practices,but soil organic carbon(SOC) sequestration potential under fertilizations remains unclear in north China 背景：碳固存潜力是种植系统和管理实践的影响，但是在施肥条件下中国北方的土壤有机碳（SOC）固存潜力仍不清楚 This study examined SOC change,total C input to soil and,via integration of these estimates over years,carbon sequestration e?ciency(CSE,the ratio of SOC change over C input) under no fertilization(control), chemical nitrogen fertilizer alone (N) or combined with phosphorus and potassium fertilizers (NP,NK,PKandNPK), or chemical fertilizers combined with low or high (1.5×)manure input (NPKMand1.5NPKM). 这项研究检测了SOC变化，土壤的总C输入，并通过多年来综合估计碳螯合效率（CSE，SOC变化与C输入的比率） 在没有施肥（对照），只有化学氮肥（N）或与磷肥和钾肥（NP，NK，PKandNPK）组合，或与低或高（1.5×）粪肥投入（NPKMand1.5NPKM）组合。 RESULTS:Results showed that, as compared with the initial condition,SOC content increased by 0.03, 0.06, 0.05, 0.09, 0.16, 0.26, 0.47 and 0.68 Mg C ha ?1 year ?1 under control, N, NK, PK, NP, NPK, NPKM and 1.5NPKM treatments respectively. Correspondingly, the C inputs of wheat and maize were 1.24, 1.34, 1.55, 1.33, 2.72, 2.96, 2.97 and 3.15 Mg ha ?1 year ?1 respectively. 结果表明，与初始条件相比，SOC含量在对照，N，NK，PK，NPNPK，NPKM和1.5NPKM处理条件下分别提高了0.03, 0.06, 0.05, 0.09, 0.16, 0.26, 0.47 和0.68 Mg C 。 相应地，小麦和玉米的C投入分别为1.24, 1.34, 1.55, 1.33, 2.72, 2.96, 2.97和3.15 Mg 。 The long-term fertilization-induced CSE showed that about 11% of the gross C input was transformed into SOC pool. 长期施肥诱导的CSE显示约11％的总C输入转化为SOC库。 CONCLUSION:Overall,this study demonstrated that decade-long manure input combined with chemical fertilizers can maintain high crop yield and lead to SOC sequestration in north China. 结论：总的来说，本研究表明，长达10年的粪肥与化肥相结合投入，可以保持较高的作物产量，并导致华北地区的SOC封存。 INTRODUCTION The so