摘要
以黑龙江省寒地黑土为研究对象,通过室内培养试验研究了大豆、玉米、甜菜根系对土壤呼吸释放CO2量、水溶性有机碳、微生物量碳和土壤有机碳含量变化的影响。结果表明:大豆、玉米、甜菜根系普遍提高土壤有机碳含量,但是不同作物根系及根系施用量之间还存在一定的差异,大豆根系要好于玉米根系,而玉米根系明显好于甜菜根系。玉米、大豆、甜菜根系提高了土壤呼吸,增加了土壤CO2排放量,提高了土壤微生物量碳含量;而普遍降低了土壤可溶性有机碳含量。
The experiment with three crops （sugar beet, maize and soybean） roots and black soil was conducted to study the changes of soil respiration and CO2 emissions, soil water soluble organic C, soil microorganism biomass C and soil organic C content in soil at different crops roots treatments. The results showed that： soil organic C content was increased after applying of sugar beet, corn, soybean roots to black soil, and the increase were the most to soybean roots, then corn roots, the less increase was sugar beet roots. Soil respiration was enhanced and CO2 emissions were increased after applying of sugar beet, corn, soybean roots to black soil. Soil microorganism biomass C dramatically enhanced in black soil, but soil water soluble organic C was decreased after applying of sugar beet, corn, soybean roots to black soil. These results are different for the different types and quantities of crops roots.
出处
《黑龙江大学自然科学学报》
CAS
北大核心
2011年第6期853-857,共5页
Journal of Natural Science of Heilongjiang University
基金
国家重点基础研究发展计划资助项目(2005CB121108-4)
