[1]LI Yingchen,WANG Qibo,HOU Cuicui,et al.Effects of Different Corn Litter Components and Their Mixture Addition on Soil N2O Emission[J].Research of Soil and Water Conservation,2016,23(06):260-264.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 06
Page number:
260-264
Column:
Public date:
2016-12-28
- Title:
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Effects of Different Corn Litter Components and Their Mixture Addition on Soil N2O Emission
- Author(s):
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LI Yingchen, WANG Qibo, HOU Cuicui, ZHANG Fang, MA Jianmin
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He’nan Normal University, Xinxiang, He’nan 453007, China
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- Keywords:
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litter addition; mixture; N2O emission; litter decomposition; total N
- CLC:
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S154.1;X511
- DOI:
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- Abstract:
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The effects of different corn litter components and mixture addition on soil N2O emission were investigated via laboratory incubation. Five treatments were set in this experiment:soil with no litter addition (CK); soil with stalk litter addition (CKS); soil with leaf litter addition (CKL); soil with leaf sheath litter addition (CKLS); soil with mixed litter (stalk:leaf:leaf sheath=5:3:2) addition (CKM). The results showed that litter addition had a priming effect on N2O emission at the beginning of the incubation. N2O emission from the samples with litter addition was stable since the sixth day of the incubation period and was greater than that from CK samples. The cumulative N2O emission from samples with litter addition was significantly higher than that from CK samples (p<0.05), further, cumulative N2O emissions of CKS and CKM were significantly greater than those of CKL and CKLS (p<0.05). Litter mixing accelerated soil N2O emission to a certain extent at the first stage of incubation (10~28 days), however, there was no interaction among different kinds of litter at the last stage of the incubation. The total N contents of all residues in the end of the incubation were significantly greater than the initial contents; on the contrast, the ratio of C/N of the incubated residues was significantly less than the initial ratios (p<0.05). For the incubated samples of CKM, the mass were smaller than that predicted value, the total N content was greater than that predicted value; while the C/N ratio was smaller than that predicted value. However, there was no significant difference between observed and predicted soil cumulative N2O emissions. These results indicated that litter mixing accelerated the processes of litter decomposition and N accumulation, but had no significant effect on N2O emission.