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Studies on the Situation of Soil Organic Carbon Storage in Croplands in Northeast of China

QIU Jian-jun WANG Li-gang TANG Hua-jun LI Hong Changsheng LI

中国农业科学（英文版）2005，Vol.4Issue(8)：594-600,7.
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中国农业科学（英文版）2005，Vol.4Issue(8)：594-600,7.

Studies on the Situation of Soil Organic Carbon Storage in Croplands in Northeast of China

Studies on the Situation of Soil Organic Carbon Storage in Croplands in Northeast of China

QIU Jian-jun 1WANG Li-gang 1TANG Hua-jun 1LI Hong 2Changsheng LI3

作者信息

  • 1. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
  • 2. Meteorology Bureau of Qiqihaer, Qiqihaer 161000, P.R. China
  • 3. Complex Systems Research Center, Institute for the Earth, Oceans and Space, University of New Hampshire, Durham, NH, USA
  • 折叠

摘要

Abstract

This paper aims to estimate the soil organic carbon (SOC) storage in Northeast of China, identify its balance situation and changing trends under current cropping systems, and finally put forward some strategies to keep the SOC in balance. A biogeochemical model (DNDC) for agro-ecosystem was employed to predict SOC dynamics in agricultural ecosystems at regional scale. Data on climate, soil properties, cropping systems, acreage, and management practices at county scale were collected from various sources and integrated into a GIS database to support the model runs at the regional scale.The model predicted results revealed that (1) Total SOC storage in agricultural lands in Heilongjiang, Jilin and Liaoning provinces in Northeast of China is about 1243.48 × 106 t (0-30cm soil layer), respectively occupying 58.4, 25.5 and 16.1%;(2) Under the current cultivation systems, SOC is in a situation of net loss with carbon losing at a high rate of 31.22 ×106 t a-1 (respectively 59.3, 25.9 and 14.8% in Heilongjiang, Jilin and Liaoning provinces) and 2.05 t ha-1 a-1, the situation is more serious in Heilongjiang and Jilin provinces; and (3) Protective cultivations, such as manuring, returning more residue of crop to the field, adopting no-till, are very useful for the accumulation of SOC in these regions.

关键词

Northeast of China/Soil/Soil organic carbon/Simulation model

Key words

Northeast of China/Soil/Soil organic carbon/Simulation model

分类

农业科技

引用本文复制引用

QIU Jian-jun,WANG Li-gang,TANG Hua-jun,LI Hong,Changsheng LI..Studies on the Situation of Soil Organic Carbon Storage in Croplands in Northeast of China[J].中国农业科学（英文版）,2005,4(8):594-600,7.

基金项目

The study was supported by the National Key Technologies R&D Program of China During the 10th FiveYear Plan Period, P.R. China (2002B A516A08). （2002B A516A08）

中国农业科学（英文版）

2095-3119

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