关键词: 草甸草原, 土壤呼吸, 土壤温度, 土壤含水量, 生长季

Abstract: Hoarding behavior of rodents includes larder and scatter-hoarding.The latter which caches a lot of seeds under ground in a wide area may has an effect on seed dispersal.Rodents usually cache seeds between the seed resource and home range.Seeds are transported only several tens of meters,with one or several seeds in one cache.Although rodents cache a lot of seeds,the post-dispersal predation rate is high and only a few of them remained.Micro-habitat of caches are often adapted to the germination of seeds.Trees with large seeds such as nuts and pine nuts are mainly dependent on the caching dispersal.Caching dispersal may help the seeds to escape heavy predation under mother tree,to colonize new place,and to arrive the habitat where they can germinate.

Key words: meadow steppe, soil respiration, soil temperature, soil water content, growing season.