应用生态学报2012，Vol.23Issue(1)：178-184,7.
“双季稻-鸭”共生生态系统稻作季节氮循环
Nitrogen cycling in rice-duck mutual ecosystem during double cropping rice growth season
摘要
Abstract
Raising duck in paddy rice field is an evolution of Chinese traditional agriculture. In May-October 2010, a field experiment was conducted in a double cropping rice region of Hunan Province, South-central China to study the nitrogen (N) cycling in rice-duck mutual ecosystem during early rice and late rice growth periods, taking a conventional paddy rice field as the control. Input-output analysis method was adopted. The N output in the early rice-duck mutual ecosystem was 239.5 kg · hm-2, in which, 12. 77 kg · hm-2 were from ducks, and the N output in the late rice-duck mutual ecosystem was 338.7 kg · hm-2, in which, 23. 35 kg · hm-2 were from ducks. At the present N input level, there existed soil N deficit during the growth seasons of both early rice and late rice. The N input from duck sub-system was mainly from the feed N, and the cycling rate of the duck feces N recycled within the system was 2.5% during early rice growth season and 3.5% during late rice growth season. After late rice harvested, the soil N sequestration was 178.6 kg-hm-2.关键词
"稻鸭共生"生态系统/鸭子系统/土壤子系统/N循环Key words
rice-duck mutual ecosystem/ duck sub-system/ soil sub-system/ N cycling分类
农业科技引用本文复制引用
张帆,陈源泉,隋鹏,高旺盛..“双季稻-鸭”共生生态系统稻作季节氮循环[J].应用生态学报,2012,23(1):178-184,7.基金项目
"十一五"国家科技支撑计划项目(2007BAD89B01)资助. （2007BAD89B01）
