Analysis of the Effect of Intercropping Grass Carp with the New Variety of Silver Crucian Carp 'Zhongke 5'

doi:10.3969/j.issn.1004-843X.2025.12.010

Abstract：Fujian Province has a large number of mountainous and hilly areas, with many mountain ponds and reservoirs built by damming according to the terrain, accounting for 52.8% of the total area of freshwater aquaculture in the province. The size and depth of these mountain ponds and reservoirs vary, the shores are irregular, the bottom is uneven, the water source is unstable, and they rely on rainfall for replenishment, which are unfavorable factors that lead to low development and utilization levels and poor aquaculture efficiency. With the further strengthening of the state's protection of arable land, the supply and demand of pond resources have become increasingly tight, and it is difficult to further expand the aquaculture area. Therefore, the reasonable and effective development of mountain pond and reservoir resources has become one of the important directions for the development of freshwater fisheries in Fujian Province. The silver crucian carp 'Zhongke 3' was introduced into Fujian Province in 2011 and carried out aquaculture demonstration. It has been widely recognized by the market due to its excellent growth performance and significant aquaculture benefits, and the seedlings have been promoted to more than 40 cities (counties) in the province. In 2018, the new variety of silver crucian carp 'Zhongke 5' (GS-01-001-2017) was introduced into Fujian Province and carried out aquaculture demonstration in multiple regions. Compared with 'Zhongke 3', it requires less dietary protein (27%) and has faster growth, stronger disease resistance, and better quality.