不同施肥处理土壤覆膜后秸秆碳对土壤有机碳的贡献

程娜; 李双异; 安婷婷; 彭畅; 朱平; 葛壮; 刘旭; 张维俊; 郭昆; 汪景宽

doi:10.13870/j.cnki.stbcxb.2020.02.028

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不同施肥处理土壤覆膜后秸秆碳对土壤有机碳的贡献

更新时间：2025-03-12

- 不同施肥处理土壤覆膜后秸秆碳对土壤有机碳的贡献
- Contribution of Straw Carbon to Soil Organic Carbon Indifferent Fertilization Treatments with Plastic Film Mulching
- 水土保持学报 2020年34卷第2期页码：195-200
- 作者机构：
  
  1. 沈阳农业大学土地与环境学院, 农业部东北耕地保育重点实验室, 土肥资源高效利用国家工程实验室,沈阳,110866
  2. 吉林省农业科学院, 农业资源与环境研究所,长春,130033
  3. 赤峰市核与辐射环境监测站,内蒙古,赤峰,024000
- 作者简介：
  
  [ "程娜(1994-),女,在读硕士研究生,主要从事土壤肥力研究。E-mail:15754909309@163.com" ]
- 基金信息：
  
  国家自然科学基金面上项目（41771328）国家重点研发计划项目"耕地地力对化肥养分利用的影响机制与调控"（2016YFD0200304）辽宁省教育厅科学研究一般项目（LSNYB201615）吉林省重大科技招标专项"玉米、水稻氮磷面源污染防控技术集成研究与示范"（20170203002NY）
- DOI：10.13870/j.cnki.stbcxb.2020.02.028
  中图分类号： S158
- 纸质出版：2020
- 稿件说明：
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程娜, 李双异, 安婷婷, 等. 不同施肥处理土壤覆膜后秸秆碳对土壤有机碳的贡献[J]. 水土保持学报, 2020,34(2):195-200.

CHENG Na, LI Shuangyi, AN Tingting, et al. Contribution of Straw Carbon to Soil Organic Carbon Indifferent Fertilization Treatments with Plastic Film Mulching[J]. 2020, 34(2): 195-200.
程娜, 李双异, 安婷婷, 等. 不同施肥处理土壤覆膜后秸秆碳对土壤有机碳的贡献[J]. 水土保持学报, 2020,34(2):195-200. DOI： 10.13870/j.cnki.stbcxb.2020.02.028.

CHENG Na, LI Shuangyi, AN Tingting, et al. Contribution of Straw Carbon to Soil Organic Carbon Indifferent Fertilization Treatments with Plastic Film Mulching[J]. 2020, 34(2): 195-200. DOI： 10.13870/j.cnki.stbcxb.2020.02.028.

摘要

基于公主岭黑土长期定位试验站，利用13C标记的玉米秸秆进行田间原位培养试验，分析不同施肥处理土壤覆膜后秸秆碳在土壤的转化及其对土壤总有机碳（SOC）的贡献，以期为东北黑土区土壤培肥和碳的固存提供依据。结果表明：裸地土壤添加秸秆后不施肥（CK）与单施化肥（NPK）处理SOC的δ13C值显著高于有机肥配施化肥（MNPK）处理（P<0.05）；覆膜土壤添加秸秆第360天SOC的δ13C值为-18.27‰~-17.19‰，且各施肥处理间差异不显著（P>0.05）。覆膜条件下土壤有机碳中秸秆碳（13C-SOC）含量显著高于（P<0.05）裸地，尤其在第60天覆膜处理是裸地处理的1~3倍，说明覆膜改善了土壤的水热条件，促进了秸秆碳在土壤中的积累。裸地条件下CK、NPK和MNPK处理秸秆碳对土壤有机碳的贡献率平均分别为1.28%，1.32%和0.46%；覆膜条件下分别为0.81%，1.51%和0.97%。由上可以看出，无机氮、磷和钾养分的供应有利于秸秆碳在土壤的积累，对土壤有机碳库固定起着正反馈作用。

Abstract

Based on long-term experiment of Black soil in Gongzhuling

13C labeled corn straw was incorporated to the field and incubated in-situ. The turnover of straw C in soil and its contribution to total SOC in different fertilization treatments with mulching were investigated

in order to provide a reference for soil fertility improvement and C sequestration in the Black soil region. The results showed that after straw returning to soil under no-mulching

the δ13C values of SOC was significantly higher (P<0.05) in the treatments of no fertilizer (CK) and chemical fertilizer (NPK) than that in the treatment of combination of organic manure (MNPK) and chemical fertilizer. The δ13C values of SOC after straw returning to soil under mulching ranged from -18.27‰ to -17.19‰ and were not significant different (P>0.05) among different fertilization treatments on the 360th day. Content of straw C in SOC (13C-SOC) was significantly higher (P<0.05) under mulching than that under no-mulching. Especially

the content of 13C-SOC under mulching treatment was 1~3 times that under no-mulching treatments on the 60th day

which indicated the soil moisture and thermal conditions under mulching promoted the accumulation of straw C in soil. The average contribution percentage of straw C to SOC in the treatments of CK

NPK

and MNPK under no-mulching was 1.28%

1.32%

and 0.46%

and was 0.81%

1.51% and 0.97% in those treatments under mulching

respectively. The results implicated that the supply of chemical nutrients of nitrogen

phosphorus and potassium promoted the accumulation of straw C in soil

which played a positive feedback for soil C sequestration.

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