摘要
本研究指出,农林复合系统中由于林木的存在,其固定 CO_2的能力是单一的农业系统的1.6～2.1倍,与同面积的农作物比,林木 CO_2年固定量是农作物的2.2倍。与之相应的野外实测结果也表明,农林复合系统大气中 CO_2浓度平均比单一的农业系统低5.5～9.5mL·m^(-3)。研究认为,在农区积极发展农林业,因地制宜地建立农林复合系统,重视林木在固定 CO_2中的作用,是抑制大气中 CO_2过快增长,调控大气中 CO_2含量,保护碳循环稳定、平衡的一项有效措施。
This reseach indicated that because of the existance of woods in the composite system of agriculture and forestry,the CO_2 assimilation in this system was 1.8～2.1 times as much as that in the single agricultural system and compared with the same acreage under cultivation,the CO_2 assimilation in the woods was 2.2 times as much as that under cultivation.The result of corresponding field actual obser- vation also showed that the average CO_2 concentration in the atmosphere in the composite system of agriculture and forestry was 5.5～9.5mL·m^(-3)lower than that in the single agricultural system.This re- search believed that to develop the agroforestry actively in the agricultural district,establish the composite system of agriculture and forestry to suit the local conditions,and think much of the function for the woods to fix the CO_2 is an effective measure to check the rapid growth of CO_2 in the atmosphere regu- late the CO_2 content in the atmosphere and protect the stability and balance of carbon circulation.
基金
黄淮海区域综合治理项目
国家自然科学基金的部分内容
关键词
农林复合系统
大气
调控作用
循环
二氧化碳
composite system of agriculture and forestry
carbon dioxide content in the atmosphere
function of regulation
carbon circulation
