中国生态农业学报2012，Vol.20Issue(3)：265-269,5.DOI:10.3724/SP.J.1011.2012.00265
“稻鸭共生”养分归还特征及水稻植株对氮、磷的吸收
Characteristics of nutrient return and uptake in rice-duck mutualism ecosystem of double rice cropping season
摘要
Abstract
Raising ducks in paddy fields is a traditional agricultural model in China. Field experiments were conducted in rice-duck mutualism ecosystems in the double rice cropping region of Hunan Province during May to October of 2010. A conventional rice field was used as the control. The characteristics of nutrient return and uptake by rice in the rice-duck mutualism ecosystem were analyzed. The main objectives of the study were to provide theoretical and practical bases for further development and utilization of this classical agricultural technique. Results showed that feeding duck in paddy fields respectively increased C, N and P by 229.87 kg-hm-2,18.22 kg-hm-2 and 17.75 kg-hm-2 of duck feces during double rice cropping season. During double rice cropping season, the return of C, N and P to soil in the rice-duck mutualism ecosystem was in the order of C > N > P. The measured values of C, N and P were 1 491.21 kg-hnf2, 66.02 kg-hm-2 and 25.14 kg-hm-2, respectively. Compared with conventional rice cultivation system, the return of C, N and P into paddy soils under the rice-duck mutualism ecosystem increased by 20.43% (P > 0.05), 55.81% (P < 0.05) and 379% (P < 0.05), respectively. While C and N returns were largely from rice root system, P return was mostly from duck feces. In contrast with conventional rice system, rice-duck symbiosis system increased soil total N by 5.73%, significantly increased soil total P by 6.25%. The rice-duck symbiosis increased root and straw total N and P and seed total P during double cropping rice season. It also increased straw N and P uptake, root P uptake and decreased yield and seed N and P uptake during double cropping rice season. Rice P uptake and content were better than N under rice-duck mutualism ecosystem.关键词
"稻鸭共生"/养分归还/早稻/晚稻/氮吸收/磷吸收Key words
Rice-duck mutualism/Nutrient return/Early rice/Later rice/N uptake/P uptake分类
农业科技引用本文复制引用
张帆..“稻鸭共生”养分归还特征及水稻植株对氮、磷的吸收[J].中国生态农业学报,2012,20(3):265-269,5.基金项目
国家科技支撑计划项目(2007BAD89B01)资助 （2007BAD89B01）
