Litter decay rate is one important content of the nutrient cycle research of forest ecosystems. The traditional field method is to leave litter samples in nylon string bags on the forestland and measure its periodically. Although this method can afford us the accurate data of litter decay rate in a particular year, it is difficult to popularize because of its time and effort consuming and useless to reflect the mean level in the whole life of the forest. In addition, this field method can not guarantee its ...