Based on technical parameter of respiration intensity of fruits measured by means of infrared CO_2 analyzer, this paper investigated the respiration volume of different parts of fruits, such as apple, pear, peach, nectarine, persimmon, grape, kiwifruit and Winter jujube. The effect of fruit falling from different height on the respiration process was also studied for apple, pear, peach and nectarine. The test results are showed as follows.The infrared CO_2 analyzer can be used to measure the respiration int...