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In this paper, a kind of temperature sensor for fermentation bed in large scale chicken farm was studied. The temperature sensing equipment includes a temperature sensor housing, a circuit board and a temperature probe detection sensor. The circuit board is provided with a microprocessor and a wireless Bluetooth communication module. The temperature probe detecting sensor is fixedly connected with the sensor housing, and at least two temperature detecting elements are arranged inside the temperature probe detecting elements, which are spaced inside the probe tube. The microprocessor is connected with the temperature detecting element and wireless Bluetooth module respectively. The temperature sensor is used to detect the wall temperature of the probe tube and generate temperature signals. The microprocessor is used to receive the detection signals and forward them to the wireless Bluetooth module. The wireless Bluetooth module is used to convert the temperature detection signals into wireless signals and send them out.

The periodical fluctuation of water鄄level鄄fluctuating zone in Three Gorges Reservoir led to the variation of the soil ecological environment between wet and dry state. This variation inevitably produce a greater change in the soil seed bank, which further affects the standing vegetation recovery and growth. In this paper, we studied the dynamic variation of soil seed bank in water鄄level鄄fluctuating zone of Three Gorges Reservoir at the beginning after charging water was studied by substituting flooding time gradient with vertical space gradient. As soil seed bank density of clear鄄cutting land increased gradually with time, the density of abandoned farmland decreased. With the vertical space gradient increasing, density of soil seed bank in water鄄level鄄fluctuating zone in May, July, September showed gradual increasing trend respectively. The

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