According to the combination method of fishing ponds, the rotation of fish and grass is divided into two modes:
First, the single-pool rotation is to perform the rotation of fish and grass in the same fishing pond, and it is mostly used in the first-year fish ponds. For example, in the Yellow River basin, fish species were planted after the pond in January, and they were stocked until summer in mid-May.
Second, the multi-pool rotation will combine a group of fishing ponds, and implement grasses, green manures and fish farming rotations in batches and in batches. The northern Yellow River basin usually starts dry ponds in mid-November and is stocked from mid-January to late March. For integrated fisheries, especially large-scale fisheries, it takes more than three months from dry ponds to final stocking. Therefore, in order to make use of the idle period of the fishing pond, make full use of the pond sludge fertilizer efficiency, increase the source of green feed and green manure, and increase the production capacity of the fishing pond, several fishing ponds can be combined into one group, and one fishing pond in each group can be used to dry the grass and plant the grass first. Finally fish culture. Afterwards, other fishing pond operations will be changed every year.
First, the single-pool rotation is to perform the rotation of fish and grass in the same fishing pond, and it is mostly used in the first-year fish ponds. For example, in the Yellow River basin, fish species were planted after the pond in January, and they were stocked until summer in mid-May.
Second, the multi-pool rotation will combine a group of fishing ponds, and implement grasses, green manures and fish farming rotations in batches and in batches. The northern Yellow River basin usually starts dry ponds in mid-November and is stocked from mid-January to late March. For integrated fisheries, especially large-scale fisheries, it takes more than three months from dry ponds to final stocking. Therefore, in order to make use of the idle period of the fishing pond, make full use of the pond sludge fertilizer efficiency, increase the source of green feed and green manure, and increase the production capacity of the fishing pond, several fishing ponds can be combined into one group, and one fishing pond in each group can be used to dry the grass and plant the grass first. Finally fish culture. Afterwards, other fishing pond operations will be changed every year.
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