液氮灭鼠法是利用液态氮在鼠洞中气化,使害鼠缺氧致死。此法灭鼠效果好,对人畜无毒,不污染环境,我们于1983年9月18日和24日进行了两次田间试验,结果如下。一、试验设计与方法:第一次试验设在城关水莲寨大队土岭上,长120米,土质沙壤,岭上长有刺槐,丛生杂草。第二次试验设在城关北堡大队玉米地埂上,土质为壤土,埂上杂草丛生。试验前3天连续开洞测定鼠打洞及相对密度(鼠打洞率)。第4天,用量杯直接灌注或用液氮泵注入,向鼠打洞内分别注入50、100、150、200、250、300、500毫升的液氮。试验重复2次。第一次 Liquid nitrogen rodent control method is the use of liquid nitrogen gasification in the rat hole, so that rats killed by anoxia. This law rodent effect, non-toxic to humans and animals, do not pollute the environment, we conducted on September 18, and September 24, two field trials, the results are as follows. First, the experimental design and methods: The first test is located in the soil gate Shui Ling Walled Tuoling, 120 meters long, soil sandy soil, the ridge has a long black locust, tussock weeds. The second test is located in Chengguan Beibei brigade maize ground,, soil is loam, 埂 on weeds. Three consecutive days before the test, holes were opened and the relative density (rat hole rate) was measured. On the fourth day, the cupping cups were directly infused or injected with liquid nitrogen pump, and 50, 100, 150, 200, 250, 300, 500 ml of liquid nitrogen were injected into the holes of the rats respectively. The experiment was repeated 2 times. the first time