摘要
于1998年4～9月采用围隔实验生态学方法,为鲤、草鱼、罗非鱼、淡水白鲳及鲢、鳙设计了4种混养模式。经测定,淡水白鲳模式(FP)、草鱼模式(GC)和罗非鱼模式(TH)模式的光能利用率都随吃食性鱼类放养密度的增大而升高,GC和TH的光能利用率相对较高;总能量转化率以鲤模式(CC)和FP较高,TH最低;饲料能转化效率在FP最高,TH最低,而且各放养模式都随吃食性鱼类放养密度的增大而下降;FP的N利用率很高,TH最低,N和P利用率在4种模式都随吃食性鱼类放养密度的增大而减小;各模式的产投比都随吃食性鱼类放养密度的增大而增大,CC、TH的产投比在吃食性鱼类放养密度最大时有所下降。
With landbased experimental enclosures set in one salinealkaline chloride water pond, the productive performances of four kinds of fed polyculture systems with different fish combinations were comparatively studied from April to September 1998 The results indicated that:the overall synthetic efficiency for solar radiation increased with the increase of stocking density of feeding fishes in FPsystem(freshwater pomphret), GC-system(grass carp) and THsystem(tilapia hybrid) The overall synthetic efficiency for solar radiation in GCsystem and THsystem was higher than that in the other systemsThe conversion efficiency for total energy was higher in CC-system(common carp) and FPsystem and the lowest in THsystem The conversion efficiency for feed energy was the highest in FPsystem and the lowest in THsystem, and decreased with the increase of stocking density of feeding fishes in each fed polyculture systemThe N and P utilizing efficiency all decreased with the increase of stocking density of feeding fishes in each fed polyculture systemThe net income of the four systems and the ratios of output to input of FPsystem in economy all increased with the increase of stocking density of feeding fishes The ratios of output in economy in enclosures with the highest stocking density of feeding fish of CC-system and TH-system reduced a little The net income in economy was the highest in FP-system, followed by THsystem,CC-system and GC-system in order
出处
《中国水产科学》
CAS
CSCD
北大核心
2003年第2期143-147,共5页
Journal of Fishery Sciences of China
基金
资助项目:国家杰出青年科学基金资助项目(397259239)
国家"九五"科技攻关专题资助项目(96-008-04-01)
国家农业科技跨越计划资助项目(K2002-16)
关键词
盐碱地池塘
养殖模式
能量利用率
能量转化率
围隔实验生态学
chloride type of water
saline-alkaline land
polyculture system
economic efficiency
ecologic efficiency
