关键词: 黄淮平原, 鼬、鼠关系, 鼠害防治

Abstract: The studies were carried out in Huang-Huai Plain from 1984- 1986．Total 61 ,822 trap-days for rodent census were set in ei ghteen counties distributed in four provinces，namely，Jiangsu，Shandon g，Anhui and Henan Provinces; the density of fieild rodent in an area of 7，660 sq．m．was investigated by，Cathch—Removal M ethod'; 43 plots of Yellow Weasel's(Mustela sibirica)census were studies of a total area of 75．12 sq．km ．distributed in eight couinies．Results were given as follows：
1． The cause of the roden ts'damage broke out on a large scale in Huang-Huai Plain at the begginning of 1989’s was analysed．2．The number of Striped field mouse (Apodemus agrarius)，Striped hamster (Cricetulus barabensis) and Greater long—tailed hamster(Cricetulus triton) took up about 95 % of total number of field ro dents． 3． Themean litter Size of Striped field mouse was 5．48 indlv．／litter(n=343)，their reproducti-ve index in Northern Huai Plain and Southeastern Yu Plain were14.84 and 15.52，respectively; the reproductive index of Greater lon g-tailed hamster in Northern Huai Plain and southeastern Yu Plajn were 15.98 and 30.03，reproductively；the mean litter size of Striped hamster in Sothwestern Lu Plajn was 6.26(n=365), its reproductive index was 8.89．4．The density of harmful rodent reached up to 7963 in div.／sp．km．The average density of Yellow weasel which is the predator of harmful rodent was 0．944±0．65 indiv.／sq．km in brceding season and 2．68±0．93 indiv．／sq．km in early winter;in the rodents' non- breeding season，weasel had some impacts in declining rodents’densities therefore the overall impact of harmful rodents’natural predators spec-ies (including owls， domestic cats， leopard cats and snakes，etc．) should be attached importance to． 5． The studies on the methods and measures of rodent control operation in Huang-Huai Plain durin g the late August through early September should be prompted．

Key words: Huang-Huai plain, The relation-ship between Weasels and rodents, Rodents' damage contro1