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根据公开发表的文献资料中的数据,从秸秆还田对土壤有机碳的增加、对生物量碳的增加和秸秆还田减少化学N、P、K肥料的使用可减排碳三个方面,定量研究了华北平原冬小麦-玉米轮作区秸秆还田对农田生态系统碳截留的作用。结果表明,在高产粮区,若小麦秸秆全部还田,可以增加土壤有机碳690 kg C.hm-1.year-1;增加生物量碳580 kg C.hm-1.year-1;因增加土壤N、P、K含量少施化肥减排碳40 kg C.hm-1.year-1;合计大约可以增加1310 kg C.hm-1.year-1的碳截留。
According to the published data in the literature, from the three aspects of straw returning to soil organic carbon increase, biomass carbon increase and straw returning to reduce chemical N, P, K fertilizer can reduce carbon emissions, quantitative The effects of returning wheat straw to corn on the carbon sequestration in farmland ecosystems in the North China Plain were studied. The results showed that in high-yielding grain-producing areas, soil organic carbon could be increased by 690 kg C.hm-1.year-1 and increased by 580 kg C.hm-1.year-1 if all wheat straw returned to the field. Soil N, P, K content of less chemical fertilizer to reduce carbon 40 kg C.hm-1.year-1; total about 1310 kg can be increased C.hm-1.year-1 carbon retention.