Fish Farming Technology in Wild Rice Stem Fields: Symbiotic Fish and Wild Rice Stem Farming for Both Ecological and Economic Benefits

Besides growing wild rice stem in a paddy field, can you also raise fish? This is the "fish-wild rice stem symbiosis" farming model that many growers are trying: harvesting both wild rice stem and fish from one field, using fewer pesticides and less fertilizer, and producing genuinely ecological agricultural products.

What Are the Benefits of Fish-Wild Rice Stem Symbiosis

The principle is not complicated. The wild rice stem plants are tall, and the water temperature in the field is relatively stable, which provides the fish with a "cool shade" to escape the heat; the plankton, tender weed leaves, and pest larvae in the field are also natural feed for the fish. Conversely, fish manure and leftover feed remain in the field, and after decomposing they become a good organic fertilizer that can enrich the soil and reduce the need for chemical fertilizers; omnivorous fish such as carp and crucian carp also nibble on weeds and root out insect eggs, playing a role in biological weeding and pest control. As the fish swim and forage in the field, they can also loosen the soil and increase dissolved oxygen in the water, which is beneficial to the growth of wild rice stem roots. In one sentence: the fish help the wild rice stem by removing pests and loosening the soil, while the wild rice stem provides shade and feed for the fish, and the two are mutually beneficial.

How to Prepare the Field and How to Stock the Fish

Choose a field with sufficient water sources, clean water quality, and convenient drainage and irrigation. When preparing the land, raise and reinforce the field ridges to prevent water leakage and fish escape; dig fish ditches and fish refuge pits in the field, that is, open several deep ditches and dig a relatively deep small water pit at the corner of the field, so that when the field is dried, fertilized, or the water temperature is too high, the fish have a place to hide. Install fish-blocking screens at the water inlet and outlet. Transplant the wild rice stem in the usual way, maintain a reasonable density, and leave enough space between rows for the fish to move around.

For fish species, it is recommended to focus mainly on varieties with strong adaptability and tolerance to low oxygen, such as carp and crucian carp, and they can also be combined with grass carp, loach, and others. The species and quantity should be based on water depth and feed conditions, and it is better to have them sparse than dense. Stocking the fry is best done after the wild rice stem has revived and survived, allowing the fry to adapt to the field water first before being released into the field to reduce stress.

Do Not Be Careless About These Points in Daily Management

First, be cautious with pesticide use. Since this follows an ecological route, for wild rice stem pests and diseases, try to rely first on physical and biological control methods. When pesticide use is truly necessary, choose products with low toxicity and rapid degradation, and drive the fish into the fish refuge pits in advance for isolation to avoid harming them. Second, water level management. During the wild rice stem swelling period and the high-temperature season, appropriately deepen the water level to also accommodate the fish's activity space. Third, moderate feeding. Natural feed in the field is limited, so a small amount of supplemental feeding can be given; feeding too much fouls the water, while feeding too little slows fish growth. Fourth, before heavy rain arrives, check the flood discharge outlets and fish-blocking facilities to prevent fish from escaping when the field overflows.

The wild rice stem and fish produced by this model can both be sold toward the organic and ecological market, giving them a price advantage. Some regions also have support policies for integrated farming, but standards vary by locality, so the specific details should be based on what the local agriculture and rural affairs department publishes. Friends who want to apply for organic certification should remember not to use chemical pesticides or fertilizers throughout the entire process, and to keep production records for future application and verification.