Effects of long-term warming elevated CO2 concentration on soil ganic carbon fractions in rice-wheat rotation开题报告

1. 研究目的与意义、国内外研究现状（文献综述）

effectsofwarming and elevated atmospheric co₂concentration on soil organic carbon stability in rice-wheatrotation

introduction

2. 研究的基本内容和问题

research purpose: to clarify the effects of atmospheric warming and elevated co₂on soil organic carbon composition.

research content: determination of organic carbon content by chemical grouping after collecting and analyzing simulated soil that was exposed to carbon dioxide concentration and heating.

key scientific problem to be solved: how to response of soc component to long term elevated co₂and warming.

3. 研究的方法与方案

• collection of soil samples after rice harvest

• handling of fresh samples and determine the fresh sample indexes such as doc and mbc

• conduct preliminary experiment to determine the most appropriate gas production time

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  4. 研究创新点

  Reveal the long-term effect of elevated CO₂and warming to SOC component and its stability.

  5. 研究计划与进展

  Month/ Year	Duration	Place / Location	Activity
  2019.10	2weeks	Changsu long-term experiment field, Jiangsuprovince	Sample collection
  2019.11-2019.12	2 months	Nanjing Agriculture University Environmental department lab	Handling fresh samples and determine the fresh sample indexes (MBC and Doc) Air dry soil samples, determinethe composition of SOC, LOCand other carbon pools and basic indicators
  2019.11-2019-12	2 months	Nanjing Agriculture University Environmental department llab	Preliminary experimentfor the measurement of gas production Laboratory culture experiment for the detection of carbon dioxide Emission
  2020.1-2020.3	3months		Organize and analysisdata

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