小麦秸秆还田对华北高产粮区碳截留的作用

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。

Effect of wheat residue amendment on carbon sequestration in high-yielding region in the North China Plain

Published data in literatures were used to estimate the effect of crop residue amendment on carbon sequestration in agriculture in the North China Plain.Three aspects were considered in the carbon sequestration calculation including soil organic carbon increase,biomass carbon increase and carbon emission decrease through decreasing chemical N,P,and K fertilization after crop residue amendment.The result showed thmt,in the high-yielding region with a winter wheat-maize rotation,entire wheat residue amendment could bring carbon sequestration of 690 kg C.hm-1.year-1 in soil organic carbon pool and 580 kg C hm-1 year-1 in biomass carbon pool,and could decrease carbon emission of about 40 kg C.hm-1.year-1 by decreasing chemical fertilizer utilization.Totally,wheat residue amendment as a practice can bring carbon sequestration of about 1310 kg C.hm-1.year-1.