Abstract:

The study aims to compare and analyze the effects of feeding and non-feeding breeding on growth of FFRC common Carp in paddy fields, and evaluate the economic benefits. We carried out the test of non-feeding and feeding with different densities of FFRC common Carp in paddy fields in Wuyishan area of Fujian. The results showed that: after 74 days of breeding, the daily average weight increment, the average instantaneous growth rate and the average weight of feeding group FFRC common Carp (NO.2 group, NO.3 group) was 2.96 times and 2.31 times, 2.67 times and 2.14 times, 1.52 times and 1.44 times as much as that of non-feeding group FFRC common Carp (NO.1 group), respectively; the growth rate and the average size of FFRC common Carp under different densities had no obvious differences (P>0.05), while, the difference of yield per unit area was great; the average unit profit of NO.1 group was 2.12 Yuan/kg, which was 1.1 times and 1.23 times as much as that of NO.2 group and NO.3 group, respectively; the difference of the marketing price led to no significant difference in the total profit of feeding and non-feeding breeding of FFRC common Carp in paddy fields. So, under the premise that there is a significant difference of the catch and the price, feeding is not necessary in paddy fields, but under the feeding condition, properly increasing stocking density is helpful to improve the yield per unit area and economic benefits of FFRC common Carp in paddy fields.

Key words: paddy field pisciculture, FFRC common Carp, feeding, growth, economic benefits