关键词: 科尔沁沙地, 植物, 热值

Abstract: The caloric values of some aboveground organs of four main plant species were measured and the relationships between seasonal dynamics of caloric values and precipitation and average temperature were analyzed from 2nd May to 20th September in Horqin Sandy Land. The results are as follows: ① There are significant differences in organ caloric values between same species and between different species. Their caloric values without ash can be ranked in a decreasing order as Caragana microphylla > Salix gordejevii > Artemisia frigida > Artemisia halodendron; and caloric with ash as Caragana microphylla > Artemisia frigida > Salix gordejevii > Artemisia halodendron. ② The caloric values of four species change with time but their changing scale are small. ③ The results indicate that the caloric values of major organs negligibly interrelated to dynamics of precipitation and average temperature.

Key words: Horqin Sandy Land, Plant, Caloric value