生态学杂志2012，Vol.31Issue(6)：1383-1389,7.
“双季稻-鸭”共生生态系统稻季磷循环
Phosphorus cycling in rice-duck mutual ecosystem in double cropping rice growth seasons
摘要
Abstract
Rice-duck mutualism is the development of raising duck in rice field in Chinese traditional agriculture. In this study, a field experiment of raising duck in rice field was conducted in a double cropping rice region of Hunan Province from May to October 2010, and an input-output analysis was made to analyze the phosphorous (P) cycling in the rice-duck mutual ecosystem, taking a conventional rice field as the control. Neither pesticides nor herbicides were applied throughout the growth period of rice in the rice-duck mutual ecosystem. In the early rice-duck mutual ecosystem, the P output was 52. 28 kg · hm-2, of which, the P output from duck was 1. 71 kg · hm-2; in the late rice-duck mutual ecosystem, the P output was 83. 24 kg · hm-2, of which, the P output from duck was 6.17 kg · hm-2. During the double cropping rice growth seasons , the P inputs of the rice-duck mutual ecosystem decreased the P deficit in soil subsystem. Tlie P input of duck subsystem mainly came from feed P, and the cycling rate of duck feces P in the mutual ecosystem in early rice and late rice growth seasons was 12.5% and 13. 5% , respectively. After late rice harvesting, the P sequestration in soil was 195.41 kg · hm-2 . In contrast with conventional rice, rice-duck mutualism decreased the deficit of soil P, while increased the soil P sequestration by 36.9%. This study provided reference for further development and utilization of rice-duck mutualism in this country.关键词
"稻鸭共生"生态系统/鸭子系统/土壤子系统/P循环Key words
rice-duck mutual ecosystem/ duck subsystem/ soil subsystem/ phosphorous cyc-line.分类
农业科技引用本文复制引用
张帆,陈源泉,高旺盛..“双季稻-鸭”共生生态系统稻季磷循环[J].生态学杂志,2012,31(6):1383-1389,7.基金项目
国家科技支撑计划(2012BAD14B03)资助. （2012BAD14B03）
