摘要
运用农业生态系统生物地球化学模型 (DNDC) ,估算北方农牧交错带内蒙古自治区耕地土壤C储量并研究其平衡状况结果表明 ,该区耕地 0~ 3 0cm土层土壤有机碳储量约为 4662 2 .6万t ,目前土壤有机碳库处于严重负平衡 ,年净损失有机碳 13 3 5万t。指出干旱半干旱农牧交错区应推行免耕。
A biogeochemical model(DNDC) for agro-ecosystem was e mp loyed to predict the soil organic carbon dynamics in ecotone between agriculture and animal husbandry in Inner Mongolia. The results show that the total soil or ganic carbon storage in 0~30cm soil of agricultural lands in Inner Mongolia is about 466.226 million ton;the soil organic carbon is lost at a rate of 13.35 mil li on t/ɑ; and protective cultivations are very useful for accumulation of soil or ganic carbon in this areas.
出处
《中国生态农业学报》
CAS
CSCD
2003年第4期86-88,共3页
Chinese Journal of Eco-Agriculture
基金
"十五"国家科技攻关重大项目 (2002BA516A 0 6 )部分研究内容