《Table 3 Microorganism of inspection of chicken, duck and goose》

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《Research and Application of Hypobaric Storage Technology in Agriculture and Food Industry in China》

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Although the low pressure storage environment of fresh agricultural product can prolong their preservation period，the appropriate low pressure value is the core of LP preservation technology and an appropriate low pressure method or type is the first element influencing preservation effects.There are two types of LP technology in China.One is the continuously withdrawing air type（CLP）as mentioned above from Burg，the other is the intermittent withdrawing air type（ILP）and has been using far and wide in scientific research.In CLP，when the pressure inside of chamber decreases to the set value the pump still operates and the pressure value is up and down slightly fluctuation under the set value，such as1 500 Pa（set value）±40 Pa（fluctuation value）.In ILP，when the pressure inside of chamber decreases to the set value of lower limit，the pump stops and thereof the pressure value will rise slowly duo to vacuum system air leak，when the pressure value rises to the set value upper limit，the pump will operate again，for example，when it reaches 15 k Pa（set value of lower limit），the pump stops if up to 20 k Pa（set value upper limit）the pump operates again to decrease pressure，and so repeated cycle.The humidification and air-change also are intermittent.The comparison between CLP and ILP is shown in Table 1.