Raising ricefield eel with livestock and poultry manure turns dung eggs into "golden eggs"

Dr. Zhou Wenzong invented the new technology of ricefield eel and loach soilless ecological breeding, which is suitable for migrant workers to return home to start their own businesses, and also suitable for rural professional households to make use of existing resources for diversified management. The project was first promoted in Yangxin County of Hubei Province in 2006, and Zhou Wenzong was awarded the honorary title of "Son of Yangxin" by his hometown. Ji Guangwen, director of Henan Province Fisheries Bureau, saw the report of Dr. Zhou Wenzong's "feedback" on agriculture in his hometown, and led the responsible persons of aquatic products of provincial cities and key fishery counties to Zhou Wenzong demonstration base for investigation and study in January 2007, and invited him to Henan for tour promotion, cooperation and construction of bases. The project has a unique "ecological cycle food chain", forming a relatively closed, multi-level energy utilization, rational energy conversion and material cycle regeneration system. The problem of livestock manure treatment, which has been plaguing farmers, has been solved, and it has become a good renewable resource and converted into organic feed, which can solve the two problems of resource shortage and environmental pollution and realize the self-recycling utilization of animal husbandry resources. CCTV 7 "Science Park" broadcast on June 10, 2009 series popular science program "Science and Technology on the Chain (2): Cattle dung chain", introduced Dr. Zhou Wenzong to help cattle farmer Wang Shuizhang in Zhengzhou City of Henan Province to cultivate loach with biogas residue and biogas slurry, planting vegetables and fruit trees. Raising earthworms, chickens and eggs with cow dung. It is reported that cow dung not only realizes zero emission, but also increases value through ecological chain extension and recycling through resource utilization. In one year, the benefits of treating cow dung alone are more than those of Wang Shuizhang raising cattle alone. Analysis of the composition of livestock waste (i) Composition analysis of cow dung Cow dung contains 14.5% organic matter, 0.30~0.45% nitrogen, 0.15~0.25% phosphorus and 0.10~0.15% potassium. It is a valuable resource that can be used as a source of soil fertilizer for planting. The organic matter and nutrient content of cow dung is the lowest among all kinds of livestock. It has fine texture, more water content, slow decomposition and low calorific value. It belongs to delayed fertilizer. The nutrient content of cow dung itself is much less than chicken manure and pig manure (nitrogen, phosphorus and potassium content are less). In addition, cow dung is a cold organic fertilizer, and its decomposition speed is slower than chicken manure and pig manure, so its fertilizer efficiency is much slower than chicken manure and pig manure.

(2) Composition analysis of pig manure Pig manure contains organic matter 15%, total nutrient content is not high, nitrogen 0.5~0.6%, phosphorus 0.45~0.5%, potassium 0.35~0.45%. Pig manure has fine texture and complex composition, including protein, fat, organic acid, cellulose, hemicellulose and inorganic salts. Pig manure contains more nitrogen, and the ratio of carbon to nitrogen is relatively small (14:1). It is generally easy to be decomposed by microorganisms and release nutrients that can be absorbed and utilized by crops.

(3) Component analysis of chicken manure Chicken manure contains rich nutrients, according to the relevant determination: chicken manure contains: dry matter 89.8%, crude protein 28.8%, crude fiber 12.7%, digestible protein 14.4%, nitrogen-free extract 28.8%, phosphorus 2.6% calcium, 8.7%. histidine 0.23%, methionine 0.11%, leucine 0.87%, lysine 0.53%, phenylalanine 0.46%. Through proper processing and utilization, it can become a very good green organic fertilizer or chicken manure feed. Chicken manure as a farm fertilizer, than pig manure, cow dung, etc. have higher fertilizer efficiency. Each ton of wet chicken manure contains 11.35 kg N, 10.44 kg P 2O 5 and 5.45 kg K 2O. Chicken manure contains a lot of organic matter, but also can be used to produce biogas raw materials, energy generation and utilization. From the above analysis data, it can be seen that livestock manure contains rich feed ingredients that have not been digested, amino acids and trace elements such as phosphorus, calcium, copper, zinc, manganese, sodium and potassium, which are the prerequisites for conversion into organic feed through biological fermentation.

II. Ecological circulation food chain of this ecological breeding project The first loop, biological fermentation treatment of livestock manure After drying and anaerobic fermentation to produce biogas or composting treatment of livestock and poultry manure, planting and breeding can be combined, which can not only reduce the pressure of manure on the environment, but also improve soil fertility and agricultural product quality, save the cost of planting, and improve the overall ecological, environmental and economic benefits. Livestock manure can not be raised earthworms without fermentation, but fresh cow dung can be directly used to raise earthworms when it is dried to 30%. If rotten melons, rotten vegetable leaves and cow dung are mixed, the effect of raising earthworms will be better.

The second ring, fermented pig dung, becomes bait for earthworms. Each ton of dung can produce 60 kilograms of earthworms. General consumption of 40 jin cow dung will grow 1 jin earthworm. Fermented pig manure is also a good feed for earthworms, which has a good impact on the growth and development of earthworms. The pig manure of one pig can breed and grow 10 kg earthworms.

The third ring and earthworm become bait for eel and loach Earthworms are easy to raise, reproduce quickly, and have a protein content of 65 - 70%. They are good protein feeds. It contains 8~9 kinds of amino acids essential for human body, 9~10% glutamic acid with umami taste, and low fat content. Because breeding earthworms does not need cost, using it instead of fish meal, on the one hand, you can save money, on the other hand, earthworm meal protein is seven or eight points higher than fish meal. Moreover, earthworms are the most favorite fresh food for eel, and almost 60% of the increase in weight of eel depends on earthworm nutrition. Due to the large demand for eel cultivation, manual collection alone can not meet the needs, artificial cultivation can be carried out in the open space by the pool, earthworm cultivation can be carried out with cattle, pig and other livestock feces, 500 grams of earthworm can be grown for every 10 kilograms of dung, and 1 kilogram of eel meat can be grown by feeding 3~5 kilograms of eel with earthworm. Artificial earthworms can be used all year round. Eels eat earthworms is the most appropriate, because earthworms contain protein, eel eat grow fast and good. In the hot summer season, fish and shrimp will not eat bad, and earthworms can not eat, but also survive and regenerate.

Fourth ring, livestock manure is converted into earthworm manure by earthworm Livestock manure is converted into earthworm dung through earthworm abdomen to realize synergy and value increase. Various nutritional components of earthworm dung are much higher than those of original dung. It contains 23 kinds of amino acids and earthworm enzymes. It is odorless, tasteless, uniform in particles and strong in air permeability and water retention. Nutrient composition of earthworm cast: moisture 13.70%, crude ash 58.22%, crude protein 8.96%, crude fiber 2.73%, crude fat 0.10%, nitrogen-free extract 16.29%, calcium 1.70%, phosphorus 0.58%. Mineral content of earthworm cast: Fe 3161μg/g; Cu 20.4μg/g; Mn 222.0μg/g; Zn 3.0μg/g; Mg 8336.7μg/g.

Fifth ring, returning earthworm dung to fields to promote organic ecological farms (vegetable gardens, orchards, tea gardens) Earthworm manure has higher nutrient and mineral content than ryegrass, etc. It can be processed into feed for cattle, pigs, chickens, ducks, fish, etc. It can also be processed into organic compound fertilizer, which is a high-quality flower fertilizer and farm manure. Earthworm manure can develop pollution-free vegetables. Earthworm manure has high organic content and is easy for crops to absorb.

The sixth ring, fruit and vegetable scraps and earthworms become feed for pigs and cattle After forming the above food chain, 70% of the feed of eel is provided by the food chain, and you only need to supplement 30% of the feed. The organization of the food chain can save you a lot of farming costs. Livestock and poultry manure raise earthworms, and then use earthworms to feed eel loach. The low-cost ecological circulation technology makes it unnecessary to buy feed for breeding and fertilizer for planting. All the products are ecological food, which is equivalent to turning waste into treasure.