长期施肥对(土娄)土黑碳积累的影响  

Effects of long-term fertilization on soil black carbon accumulation in Lou soils

作　　者：于小玲[1] 佟小刚[1] 杨学云[1] 李明[1] 吴发启[1] 

机构地区：[1]西北农林科技大学资源环境学院,农业部西北植物营养与农业环境重点实验室,陕西杨凌712100

出　　处：《植物营养与肥料学报》2012年第6期1404-1411,共8页Journal of Plant Nutrition and Fertilizers

基　　金：“十二五”国家科技支撑项目“黄土高原农果牧复合循环技术集成与示范”(2012BAD14B11)资助

摘　　要：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。Effects of fertilization on content and accumulation of soil black carbon were investigated based on the 20-year long-term experiment on Lou soil. There were four fertilizer treatments, the control without applying any fertilizers （ CK）, single application of chemical fertilizer （ NPK）, straw returning combined with chemical fertilizers （SNKP） and organic manure combined with chemical fertilizers （M1NPK, M2NPK）. Results show that compared with the CK, the single application of chemical fertilizer has no effect on the content and accumulation of black carbon, the treatments of organic manure combined with chemical fertilizers （M1NPK, M2NPK） significantly increase the contents of black carbon in the 0-20 cm soil depths and the black carbon contents are increased by 108% and 134% in the 0-5 cm soil depths and 164% and 176% in the 5-10 cm soil depths respectively, and the accumulations of black carbon in soil profiles are increased by 1.51 and 1.55 times respectively under M1NPK and M2NPK treatments. The black carbon contents in top soils are increased under the treatment of SNPK, but the increases are relatively small compared with the manure application. Effects of the fertilization on the black carbon mainly occur in the top soils, while the black carbon contents in the deep soils are less affected.

关 键 词：长期施肥 有机碳 黑碳 蝼土 

分 类 号：S158[农业科学—土壤学]