三种枯落叶对克氏原螯虾仔虾群体生存的影响  

The effect of three kinds of leaf litter on the growth and death of post-larvae of Procamburas clarkii

作　　者：周锋[1] 李佳佳[2] 唐建清[2] 黄成[1] 

机构地区：[1]南京大学生命科学学院,江苏南京210046 [2]江苏省淡水水产研究所,江苏南京210017

出　　处：《水产养殖》2016年第1期49-52,共4页Journal of Aquaculture

基　　金：江苏省农业科技自主创新资金项目[CX(14)2077]

摘　　要：为探究林地枯落叶对克氏原螯虾仔虾群体生存的影响,选取了常规栽培树种意杨、构树以及垂柳,以仔虾(0.016±0.003 g)群体为研究对象,设置了空白对照、意杨叶、构树叶以及垂柳叶四个处理组,其中三种枯落叶设计两个浓度梯度,即覆盖养殖箱底一层量和三层量,饲养并测定各项生长性能指标。试验结果表明:①一层量枯落叶下,三种枯落叶均能极显著促进仔虾的生长(P<0.01),意杨叶组仔虾病死率极显著低干对照组(P<0.01),而其余两组病死率极显著高于对照(P<0.01)。②三层量枯落叶下,仅意杨叶极显著促进仔虾的生长(P<0.01),而其余两组与对照组差异不大(P>0.05)。③不同类型三层量与一层量枯落叶对仔虾病死率的影响差异不大(P>0.05)。The purpose of this study is to investigate the effect of leaf litter on the growth and death of postlarvae of Procamburas clarkii. Average weight of crayfish is （0.016±0.003）g. There are four experimental treatments on crayfish populations, control, leaf litter of Italian poplar （Populus euramevicana cv.＇I-214＇）, leaf litter of paper mulberry （Broussonetia pupyrifera）, and leaf litter of drooping willow （Salix babylonica）. There are two concentrations of different kinds of leaf, normal and triple. Crayfish were fed for a certain time under different treatments. Related data were collected and analyzed. The results are shown as follows. （1）Under the normal concentration, all of the three kinds of leaf can significantly promote the growth of crayfish （P〈0.01）. （2） The triple leaf litter of Italian poplar can significantly promote the growth of crayfish （P〈0.01）, but the triple leaf litter of paper mulberry and drooping willow can not （P〉0.05）. （3） The leaf litter of Italian poplar can significantly reduce the death rate of crayfish （P〈0.01）. （4）Both the leaf litter of paper mulberry and drooping willow can significantly increase the death rate of crayfish （P〈0.01）. （5）The difference between two concentrations of different kinds of leaf litter is small（P〉0.05 ）.

关 键 词：枯落叶 克氏原螯虾 生长 病死率 

分 类 号：S966.12[农业科学—水产养殖]