摘要
在中国科学院沈阳生态站(埋袋法)和海伦站(砂滤管法)研究了不同有机物料中有机碳和有机氮的矿化进程、分解残留率和C/N的动态变化.结果表明:有机物料中有机碳和有机氮的分解进程可分为快、慢2个阶段;各有机物料中有机氮的矿化速率均明显低于有机碳,因而其残留率高于有机碳;有机物料C/N的下降速率也可分为快、慢2个阶段.经3～5年分解后,各种有机物料残留物的C/N趋于稳定:低C/N有机物料(猪粪)残留物的C/N值接近土壤腐殖质的C/N,约为10,已完成其腐殖化过程;高C/N有机物料残留物的C/N值处于适宜微生物活动的25左右,利于增加土壤有机质、培肥土壤.
By using nylon mesh bags and sand filter tubes, this paper studied the decomposition of organic materials in the soils at Shenyang and Hailun eco-experimental stations of CAS to investigate the dynamic changes of their organic C and N during decomposition. The results showed that the decomposition process could be divided into two phases, i. e. , quick phase and slow phase. The organic N in the materials had an obviously lower decomposition rate than organic C, and thus, had a higher residual rate. The decline of C/N ratio could be also divided into quick and slow phases. After 3-5 years decomposition, the C/N ratio of all test materials tended to be stable. The C/N ratio of the residual organic materials with an initial lower C/N （ such as pig manure） approached to that of soil humus, being about 10, which indicated that the humification process was completed, while that of the residual organic materials with an initial higher C/N was about 25, being available to the activities of soil microbes, which would benefit the increase of soil organic matter and the improvement of soil fertility.
出处
《应用生态学报》
CAS
CSCD
北大核心
2007年第11期2503-2506,共4页
Chinese Journal of Applied Ecology
基金
中国科学院野外台站基金项目
中国科学院知识创新工程重要方向项目(KZCX3-SW-433)
中国科学院沈阳应用生态研究所海外留学基金资助项目.
关键词
有机物料
有机碳
有机氮
C/N
organic material
organic carbon
organic nitrogen
C/N ratio
