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秸秆不同还田方式对旱地棕壤CO2排放和土壤碳库管理指数的影响

杨旭,兰宇,孟军,陈温福**   

  1. (沈阳农业大学辽宁省生物炭工程技术研究中心, 沈阳 110866)
  • 出版日期:2015-03-10 发布日期:2015-03-10

Effects of different stoverincorporation ways on CO2 emission in dryland brown soil and soil carbon pool management index.

YANG Xu, LAN Yu, MENG Jun, CHEN Wen-fu**   

  1. (Liaoning Biochar Engineering Technology Research Center, Shenyang Agricultural University,  Shenyang 110866, China)
  • Online:2015-03-10 Published:2015-03-10

摘要:

通过玉米种植田间试验,研究了玉米秸秆直接还田和炭化还田对旱地棕壤CO2排放及土壤碳库管理指数的影响。结果表明:与对照相比,秸秆直接还田和秸秆炭化还田均显著增加了土壤CO2的累积排放量,分别高于对照132%和76%;在同等化肥施用条件下,秸秆炭化还田比直接还田显著降低了土壤CO2的累积排放量,降幅为24%。与秸秆直接还田相比,生物炭的施入起到了良好的CO2减排效果。秸秆还田可以显著提升土壤碳库管理指数,与秸秆炭化还田相比,秸秆直接还田的效果更为显著。

 

关键词: 灌浆特性, 品质, 产量, 冬小麦, 滴灌量

Abstract: A field experiment was conducted to investigate the effects of corn stover returning and biochar application on the CO2 emission and carbon pool management index (CPMI) in dryland brown soil. The results showed that both stover returning and biochar application increased the cumulative CO2 emission of soil significantly by 132% and 76%, respectively, compared with the control. Under the same level of fertilization, biochar application significantly decreased the cumulative emission of CO2 by 24% compared with stover returning. Biochar played a positive role in CO2 emission reduction, in contrast with stover direct returning. Stover returning significantly increased CPMI, and this effect of stover direct returning was more significant compared with biochar application.

Key words: drip irrigation amount, winter wheat, quality, grain filling properties, yield