[0041] Example 1:
Tongcheng Su's Agricultural Development Co., Ltd. owns 20 paddy fields with a total area of 560 mu and a single paddy field area of 28 mu. The paddy fields have abundant and fresh water sources and are convenient for irrigation and drainage.
[0042] 1. Paddy field preparation
The experimental demonstration paddy fields are distributed on both sides of the main road. The paddy fields are square. The ditch is 3 meters wide, 1 meter deep, and 1 meter high. The area of the ring ditch accounts for 8.8% of the total area of the paddy field. In the celery planting area, near the edge of the ring ditch in the cress planting area, set up anti-escape geogrids. The bottom end of the geogrid is buried 50cm in the soil, 1.2 meters above the cress planting area, and cement poles are installed every 4 meters to support For the geogrid, a 30cm anti-escape edge is folded at the end of the geogrid to the field, and along the periphery of the anti-escape network, a food table and a sunbathing table with a length of 3m and a width of 1m are set every 20 meters. Water inlet pipes are arranged on both sides of the ridge of the main road, drainage channels are arranged on both sides of the 20 experimental fields, and drainage wells are arranged at the other end of the diagonal line of the inlet and outlet of each field, so that the water inlet and outlet of each rice and turtle field are separated. .
[0043] 2. Desilting and disinfection
From January 10 to 13, 2020, the silt in the ring ditch was completely removed, 75-100kg of quicklime was sprinkled on each acre of the ring ditch, the ditch was thoroughly cleaned and disinfected, and it was frozen and dried for 41 days.
[0044] 3. Animal and plant stocking and colonization
(1) Stocking of fry
From February 20th to 25th, 2020, water was added to submerge 40-50cm of the field surface, and 5 carps with a size of 0.5-1 catties and 20 silver carp and bighead fingerlings with a size of 0.5-1 catties were stocked per mu (silver carp and bighead carp with a combination of silver carp and bighead carp). A total of 2,800 carp species and 11,200 silver carp and bighead species were stocked in the 20 experimental demonstration fields. Before the fry are stocked, soak the fingerlings in 3-5% salt water for 3-5 minutes.
[0045] (2) Cress colonization
From March 26 to 30, 2020, a cress planting floating bed was set up along the cress planting area in the middle of the ridge. Each field was set up with 150 cress floating beds, and the interval between each floating bed was 2.5 meters. And plant cress seedlings with a length of about 10cm on the floating bed, plant 1 celery seedling for every 3 holes of the geogrid, and plant 120,000 cress seedlings in each field, and a total of 2.4 million cress seedlings are planted in 20 experimental demonstration fields. tree.
[0046] (3) Rice cultivation
From May 25th to June 5th, 2020, the rice variety was selected as Fengliang Youxiang No. 1, drained to the water level of 2-3cm on the field surface, and the seedlings were transplanted according to the row and plant spacing of 30cm*20cm. There is a 50cm interval between the bars, which is convenient for Chinese soft-shelled turtles and fish to enter and leave the paddy fields freely, and 11,000 seedlings are planted per mu.
[0047] (4) Baby soft-shelled turtle stocking
From June 11 to 15, 2020, 17 days after the seedlings were transplanted, the water temperature was stable above 25°C, and 84,000 young turtles with a specification of 400-500g/piece were purchased from Anhui Xijia Agricultural Development Co., Ltd. Only, before stocking, juvenile soft-shelled turtles were immersed in povidone-iodine (containing 1% available iodine) solution with a concentration of 30 mg/L for 5 minutes, placed on the mechanized road, and allowed to climb into the rice fields on their own.
[0048] (5) Putting eel seedlings
From July 10 to 15, 2020, 1300 catties of eel seedlings with specifications of 10-35g were purchased from Anqing City, 2.3 catties per mu, and povidone-iodine (containing 1% available iodine) liquid immersion with a concentration of 30 mg/L was used Bath for 5 minutes, and stocked evenly along the cress planting area around the ridge.
[0049] 4. Feeding management
On June 15, 2020, the turtle seedlings were fed with feed 3 days after the seedlings were placed. They were fed twice a day in the morning and evening. From 8:00 to 9:00 in the morning, they were fed with fish pieces cut into the size of broad beans. At 6:00, the special compound feed for soft-shelled turtles (45% protein content) is fed, and the compound feed is kneaded into a mass and fed; the feed is fed on the food table near the water surface (the feed should not be submerged in the water). In June, the daily feeding rate was 1%, and 840 catties were fed every day, including 250 catties of small trash fish, accounting for 30% of the whole day feeding, and 590 catties of compound feed, accounting for 70% of the whole day feeding; start feeding For the first 7 days, the compound feed was mixed with 0.2% VC in the afternoon, and fed continuously for 7 days to reduce the stress response of soft-shelled turtles. In July, the daily feeding rate was 2%, and the daily feeding rate was 1,800 jin, of which 540 jin was fed in the morning and 1,260 jin of compound feed was fed in the afternoon. In August, the daily feeding rate was 2.5%, and the daily feeding was 2,700 jin. Among them, 800 kilograms of small trash fish were fed in the morning, and 1900 kilograms of compound feed was fed in the afternoon; in September, the daily feeding rate was 3%, and 3800 kilograms were fed every day. Among them, 1100 kilograms of small trash fish were fed in the morning and 2700 kilograms of compound feed was fed in the afternoon. In October, the daily feeding rate was 1%, and the daily feeding was 1,260 catties, of which 380 catties were fed in the morning, and 880 catties were fed with compound feed in the afternoon. On October 20, when the temperature dropped below 20°C, feeding was stopped. During the breeding process, the amount of residual bait can be increased or decreased as appropriate.
[0050] 5. Water quality adjustment
(1) Water level control
In March and April, keep the water level of the field surface at 40-50cm; in May, the water level of the seedling transplanting field is 3-5cm; in June, the tillering water level of the seedlings is 5-10cm, in the jointing period in July, the water level is 10-15cm, and in the booting poplar flowering period in August, the water level is 10-15cm, the full-earth grain filling period in early September, the water level is 15-20cm, after the wax is mature in the middle and late September, the dry field is gradually drained into the ring ditch, in October, the rice is harvested, after the rice is harvested, immediately add water to submerge the field surface 60cm; 1 After the fish catch in the month, return the water immediately to submerge the field surface 60cm.
[0051] (2) Water quality adjustment
After August 2020, in the ring groove, alternately use potassium hydrogen persulfate primer and biological primer once every 10-15 days, each time potassium hydrogen persulfate primer per mu of ring groove (effective content 20%) 300-400 grams, 500-600 grams of biological primer per acre of ring groove each time, sprinkle Bacillus or EM bacteria 1-2 times in the ring groove once a month, the dosage of 1-2 times per acre ring groove each time 1.5kg; change the water every 15 days, about 20% of the water each time; every 20 days, sprinkle quicklime in the ring ditch once, according to the area of the ring ditch, use 5 kg of quicklime per mu of ring ditch each time , keep the water fertile and fresh.
[0052] 6. Rice pest control
On July 10 and August 20, 2020, rice borers, rice planthoppers and other diseased insects and eggs were found to be many. The paddy field was submerged with water for 40 cm in two times, and kept for 4 days, so that turtles and carp entered the rice fields to feed. The eggs and bodies of the diseased insects and insects were drained to the water level of 10 cm on the field surface after 4 days. The inspection found that the number of eggs and insects in the field decreased significantly. At the same time, the rotten grass and leaves in the field decreased, which increased the permeability of the paddy field. After that, no diseases such as rice smut and rice blast occurred. During the whole growth period, only use the breaking medicine once before the full heading of rice to control rice sheath blight, rice smut, rice blast, rice leaf roller, heart borer, rice planthopper, etc., and reduce the amount of pesticides by 80%.
[0053] 7. Harvest
(1) Harvest of cress
From May to November 2020, a total of 4 crops of cress were harvested, and a total of 120,000 catties of high-quality cress were harvested, achieving an output value of 360,000 yuan.
[0054] (2) Rice harvesting
From October 1 to 10, 2020, after the rice is mature, the rice is harvested. A total of 706,000 catties of rice were harvested, with an average yield of 1,260.7 catties per mu and a total output value of 847,000 yuan.
[0055] (3) Fishing of Chinese soft-shelled turtles
2020 is the first year of the Chinese soft-shelled turtle stocking, and no commercial soft-shelled turtle is sold. Seven days after the rice is harvested, water is added to submerge 60 cm of the field. The 10 experimental and demonstration fields are expected to produce 78,000 catties of commercial soft-shelled turtles; it is planned that in 2023, the remaining 5 experimental and demonstration fields will be harvested, and the estimated commercial soft-shelled turtle production will reach 43,000 catties, and the total output of soft-shelled turtles will reach 155,000 catties in 3 years. 50 yuan/jin, 80 yuan/jin for 3-year soft-shelled turtle, 100 yuan/jin for 4-year soft-shelled turtle, the output value is 12.24 million yuan, equivalent to an annual output value of 3.06 million yuan.
[0056] (4) Fish fishing
On January 20, 2021, silver carp, bighead carp and carp were caught. The average size of silver carp and bighead carp reached 4 catties, and the average size of carp reached 5 catties. A total of 40,000 catties of silver carp and bighead carp and 12,500 catties of carp were harvested. , 71.4 catties of bighead carp and 22.3 catties of carp, with a total output value of 263,000 yuan, an increase of 469.6 yuan per mu. After the fish was caught, water was added immediately to submerge the field surface for 60cm, and then the fry was added for cultivation.
[0057] (5), eel fishing
From March 20 to July 5, 2021, 50 dense-eye cages were set up in each field every day, and the eel was sold in rotation. A total of 2,300 kilograms of yellow eel were caught, with an average yield of 4.1 kilograms per mu, and an output value of 70,000 yuan.
[0058] The final cumulative annual output value is 4.6 million yuan, the average output value per mu is 8214.3 yuan, and the average profit per mu is 3310 yuan.
