科尔沁沙地土壤酶活性与植被的关系

Relationships between Soil Enzyme Activity and Vegetation in Horqin Sandland

为揭示科尔沁沙地植被的生长情况,从实验地取样,测定科尔沁沙地不同地貌及典型植被近根际的土壤酶活性,主要包括磷酸酶、脲酶、蛋白酶等.结果表明:固定沙丘的土壤酶活性最高,而流动沙丘的酶活性最低;羊草、大油芒、断肠草等多年生草本植被的近根际土壤酶活性普遍高于小叶锦鸡儿、差巴嘎蒿、山竹子等灌木植被;而小叶锦鸡儿的近根际土壤酶活性在灌木植被中为最高,说明小叶锦鸡儿为一种较好的固沙植被.

In recent years, some shrubs and semi-shrubs have been planted in Horqin sandland, and certain results have received. Soil enzyme involves in the biochemical reactions, enzyme activity may reflect soil fertility conditions and growth state of the vegetation. To reveal the growth state of vegetation in Horqin sandland, soil samples have been obtained from the sample plot. Soil enzyme activity has been measured, including Phasphatase, Urease, Proteinase, etc. The results showed that soil enzyme activity of fixed sand dune and moving sand dune are the highest and the lowest respectively among three sandland types; Soil enzyme activity in herbaceous plants community, such as Aneurolepidium chinese Spodiopogon sibiricus and Stellera charnaijiasme, is higher than that in shrub and semi-shrub community, including Caragana microphylla, Artemisia halodendron and so on. Soil enzyme activity of rhizospheric soil of Caragana microphylla community is the highest in shrub plants. Caragana microphylla is a kind of better sand-fixed vegetation.