Li Rongsheng, a villager in Linhe Village, Goutun Township, Suining County, Jiangsu Province, has explored a new way of ecologically breeding Astragalus membranaceus in rice fields based on the rapid natural growth of Astragalus in paddy fields. In 2005, Li Rongsheng harvested 700 kg of astragalus in a 5.7-acre paddy field, with a net income of 15,000 yuan. Driven by his demonstration, ecological conservation in rice fields has become a “short, flat, fast†project for increasing the income of local farmers. The main points of its breeding techniques are described as follows: Paddy field and field construction The cultivated paddy fields require more soil, more water, guaranteed water quality, convenient management, and an area of ​​less than 15 acres. It is required to be high and strong and can hold more than 30 cm of water. Tian Hao is surrounded by bricks, or uses cement boards and polyethylene mesh cloth as a guardrail to prevent escape. It is about 80 cm high. Intake and drain outlets are made of concrete, with wire mesh to prevent jaundice from escaping. In the middle of the rice field and evenly in the middle, excavation of "field" or "well" shaped fish ditch, 40 to 50 cm wide and 60 to 80 cm deep, occupying an area of ​​15% to 20% of the paddy field. Disinfection of paddy fields and grazing in stockings. In the first half of the stocking period, use 2 liters of quicklime per 100 square meters of fish ditch to disinfect and keep the water depth at 20-30 cm. The most recent acquisition of the species, the shorter the better the transport time, the general choice of local deep yellow turtles. The species requirements are disease-free, injury-free, robust, and similar in size. Each weighs 20-30 grams. About 50 kilograms per acre stocking species, once enough, at the same time can be stocked with a small amount of carp, loach, shrimp, etc., to provide basic food baicalin. When the species is stocked, it is sterilized with 3% to 5% salt water. Tamed food and bait feed squid to eat animal feed such as fresh clams, small fish, shrimp, yellow mealworms, cocoons and mites. However, it is difficult to guarantee the supply of a large number of live feeds in culture. After 20 days of stocking, it has begun to adapt to the new environment. The method is: Early use of fresh squid, Tenebrio molitor, cocoon and other meat pulp, according to 20% of the proportion of mixed into the soft-shelled turtle feed or squid feed, tame food 1 to 2 days. After successful taming, the ratio of animal foods can be gradually reduced. Feeding is conducted in the evening and adheres to the principle of “Four Setsâ€. When the temperature is low and the air pressure is low, cast less. When the weather is fine and the air temperature is high, cast more. The next morning will not be subject to residual baits, and the amount of feed will be weight of the astragalus. 2% to 4%. In addition, black light or fluorescent light can be installed in the paddy field to attract insects for feeding. Rice cultivation and daily management rice should choose long-growth, disease-resistant, lodging-resistant varieties, spread wide-line close planting, plant spacing is generally 15 cm 15 cm. Before transplanting rice, apply base fertilizer (long-lasting cake-based fertilizers). In the prevention and control of rice diseases and insect pests, high-efficiency, low-toxicity or biological pesticides should be selected. When spraying, the nozzles should be upwardly aligned with the leaves and the water level should be raised. Change the water promptly after use, to prevent pesticides from adversely affecting the jaundice. In the management of water quality, the early shallow water level (5 to 10 cm), medium water depth (15 to 30 cm), and late normal water level were adhered to, basically meeting the needs of rice and alfalfa growth. Adhere to the morning and evening inspections to observe the growth of Astragalus, anti-escape facilities, etc., and take appropriate measures in time to pay attention to the removal of predators. The prevention and control of common diseases of common carp is based on the principle of prevention and prevention and control. The fish ditch is regularly sprinkled with lime solution or used with microorganisms. Paddy field ecologically cultivated jaundice. Common diseases include fever and parasitic diseases. If fever develops, 10 grams of garlic per cubic meter of water, 5 grams of salt, and 15 grams of mulberry leaves may be smashed into the fish ditch, 2 times a day for 2 to 3 days. The diseases caused by parasites mainly include capillary nematodes and thorny head worms. They are fed with 10 g of 90% crystal trichlorfon per 100 kg of jaundice mixed with baits, and can be cured after 6 days of feeding.
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