How to manage fish farming in rice field

"Fish farming in rice fields" not only has less investment, but also has abundant grain, fat fish, ecology, and generates income. Now there are demonstration sites for rice field and fish culture in many parts of our country. In order to make farmers better understand fish culture in rice field, the main technical points of fish culture in rice field are briefly introduced for reference.

Rice field fish culture

First, field selection: select rice fields with clean water quality, adequate water sources, convenient drainage and irrigation, good performance of water and fertilizer conservation, and are not affected by drought and waterlogging.

2. Field engineering facilities:

(1) to dig fish ditches and fish ponds. During the growing period of rice, it is necessary to adjust the water level and give consideration to both dry and wet. Shallow irrigation and sun-drying in rice field is an important technical measure for high-yield cultivation of rice. In order to solve the contradiction of water use of fish in rice field, it is necessary to dig fish ditch and fish fish before transplanting seedlings to increase the water capacity of rice field, which is beneficial to the growth of fish, fertilizing and spraying rice. Fish ditch: the depth is 50-80 fish, the width is 50-100 fish, fish ditch and fish fish should be connected, the number and arrangement of fish ditch are determined according to the shape and size of rice field, generally can be "ten", "well", "field" shape, each ditch should be straight, conducive to drainage, ventilation, light transmission. Fish boat: excavated in the corner or in the middle of the field, the depth is 1-1.5 meters, accounting for 5-8% of the rice field area, the shape: rectangular, square, round.

(2) heighten and strengthen the ridges of the fields. Before transplanting rice seedlings, the rice fields of fish culture should be combined with digging fish ditches and fish ponds, raising the ridges to 50-70 inches, widening them to 40-50 inches, and beating them firmly to ensure that they will not leak or collapse.

(3) Fish blocking facilities shall be set up at the inlet and outlet. The inlet and outlet of fish and rice field should be set at the corresponding corner of rice field, and fish fence should be set up, which should be made of bamboo strips or nylon net.

Third, fish seed delivery: Rice field fish culture, generally 7-15 days after planting seedlings, after the seedlings turn green, begin to put in fish species, mainly grass carp, carp, crucian carp. The large size of 50-100 grams per tail is better, and 10-20 kilograms per mu is appropriate. Before the fish is planted in the field, the fish can be soaked in salt water with a concentration of 3% Mel 5% for 3-5 minutes to disinfect the fish.

Rice field fish culture

4. Feeding and management:

(1) artificial bait. The water in the paddy field is shallow and the natural bait is limited. In order to improve the quality and yield of fish, artificial bait must be given, such as rapeseed, bran, formula feed and so on. Feeding should be "timed, positioned, qualitatively and quantitatively".

(2) Water management. In the early stage of rice growth, the water level was kept at 3-5 times, so that the rice turned green as soon as possible, and in the middle and later stage of rice growth, the water level in the rice field was kept at about 15 years.

(3) daily management. The key to fish culture in rice fields is to prevent leakage and fish escape. Therefore, it is necessary to inspect the ridges of the fields and check the fish grids, especially on rainy days, to drain water in time, and pay attention to remove sundries clogging the grids so as to facilitate the smooth flow of water drainage and injection. In rice fields, voles and rice field eels will make holes in the ridges, causing water leakage to escape fish, which should be carefully checked and blocked in time.

(4) fertilization management in the field. In order to solve the damage to fish caused by rice fertilization, the interval fertilization method can be used. That is, a rice field is divided into two parts, about 2 days apart. Give priority to organic fertilizer, supplemented by chemical fertilizer; second, heavy application of base fertilizer, light application of topdressing.

(5) pesticides with high efficiency, low toxicity, low residue and broad spectrum shall be selected, and pesticides that are highly toxic to fish shall be prohibited. The medicine should be sprayed on the seedlings as far as possible, choose sunny days to apply medicine, do not apply medicine before rain.