关键词: 差不嘎蒿, 干物质热值, 有机干物质比, 去灰分热值

Abstract: In this paper we have measured the Heat Value (Q) of Artemisia halodendron population which is the dominant species in sandy land, and its composition elements. Data analysis showed some results as follows: First, the Q of dry material of A. halodendron population in different sand dunes is the highest in fixed sand dune, higher in semi fixed sand dune and common in shifting sand dune. Moreover, the Q values in fixed and semi fixed sand dunes are considerably larger than that in shifting sand dune; The Q of dry material with ash deducted in fixed sand dune is largely higher than that in semi fixed and shifting sand dunes. Second, the rate of organic dry material for composition elements of A. halodendron is similar in different sand dune types, the change trend of Q for dry material and ash deducted dry material is same as following order: fixed sand dune > semi fixed sand dune ≥ shifting sand dune. Third, Q values of dry material and ash deducted dry material, and the rate of dry organic material for A. halodendron have variance in different growth period. In general, Q of dry material follows an order: storage organ > propagation organ > the litter of propagation; The Q ash of deducted dry material follows that in the propagation is higher than in the other growth status. Fourth, the Q values of ash deducted dry material of different ages branches for the storage organ of A. halodendron rise obviously with branch age increase in fixed sand dune, while go down in shifting sand dune. In semi fixed sand dune the deducted ash Q of middle age branches is obviously higher than that of the other age branches.Fifth, Q of dry organic material and Q of the ash deducted for same elements of A. halodendron in different sand dune types, are in positive correlation except four age branch. Especially, three age branch is most typically. The relationship between the dry organic material and the Q of the ash deducted for different growth status is negative in same niche; it is most typically in fixed sand dune. These illustrate the acclimatizing ability of A. halodendron for different niche in growth and propagation process.

Key words: Artemisia halodendron, Heat value of dry material, Rate of dry organic material, Heat value of ash deducted dry material