Dear Friends:

Joseph Dioha [fepazeri@cyberspace.net.ng] asked
> Under materials and methods, you stated that
> >....in manure loaded pond they put in small amount of grass
> >except chicken manure while in slurry-loaded pond..........
>
> What purpose does the grass serve in the manure-loaded pond?

Small amounts of grass serve as feed for grass carp, which is a big eater.
In China, water hyacinth, which is a pest in Africa, serves as feeds for
grass carp in the middle of growth period.

Why in the middle? Because the grass carp fingerlings below 9 cm body
length can not feed it, and near the harvest time, grass carp should be
given some fine feeds to be fattened for marketing.

Li Kangmin