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Greenhouse feces breeding fly maggots
The greenhouse is designed to utilize manure from the fly to raise the temperature within the shed, while also providing shelter from rain. The manure is used as a medium to cultivate leeches, which helps in maintaining a warm environment. The greenhouse is oriented towards the south, with the southern side higher than the northern side. This design allows for a transparent wall on the south side, which absorbs sunlight and extends the breeding season throughout the year. A drainage ditch is installed at the bottom of the southern side to manage condensation effectively. Insulation materials are used on the roof to prevent moisture buildup and maintain stable internal temperatures.
Some farmers place their greenhouses near pigsties or chicken coops, allowing warm air from these areas to naturally flow into the greenhouse. In some cases, small exhaust fans are used to enhance this process. This natural heating method not only increases the temperature inside the greenhouse but also boosts the production of fly larvae and extends the breeding period.
The entrance to the greenhouse is located on the eastern side, making it easier to control light exposure and temperature during different times of the day. Inside the greenhouse, there are several square pools known as Dianchi Lakes, each measuring 1.5 meters in size. These pools are strategically placed to collect and manage fly larvae efficiently.
Each Dianchi Lake is constructed with a 30-35 degree slope around the middle level, rising about 18 centimeters above the center. A 15 to 20 centimeter wide ditch is left around the pool, and in each corner, a deep 30-centimeter receiving pond is installed. These ponds are lined with plastic bags, making it easy to collect and remove the larvae whenever needed.
The original design ensures that when the larvae grow old, they naturally climb up the slopes, fall into the surrounding ditches, and eventually end up in the receiving ponds. Since fly larvae are sensitive to light, they tend to emerge at night and gather in the early morning. If some larvae remain in the pool, they can be manually separated.
Flies themselves do not support the larvae directly. Instead, their eggs come from cages or fields where flies are trapped to lay eggs. The eggs are then mixed with fecal matter and placed in an outdoor setup for maggot farming. This system helps in maintaining a sustainable and efficient way of raising fly larvae for various purposes.