摘要
选取26年生的小叶锦鸡儿、山竹岩黄蓍、差巴嘎蒿、小黄柳和樟子松5种典型人工固沙群落及不同生长年限的小叶锦鸡儿群落为研究对象,对群落土壤养分、酶活性和硝化活性进行了对比研究。结果表明:26年生的小叶锦鸡儿群落土壤有机质、全氮、铵态氮和硝态氮含量均明显高于其他4种植物群落;小叶锦鸡儿群落土壤脲酶、蛋白酶活性和硝化活性最高,小黄柳群落土壤硝酸还原酶活性最高。土壤脲酶和蛋白酶分别与有机质呈显著正相关。随着生长年限的增加,小叶锦鸡儿群落土壤养分、酶活性和硝化活性逐渐升高,其中有机质、脲酶和蛋白酶活性与生长年限之间均存在显著正相关关系。
Taking 26-year-old Caragana microphylla,Hedysarum fruticosum,Salix gordeivii,Artemisia halodendron,and Pinus sylvestris var.mongolica plantations and different aged C.microphylla plantations in Horqin Sandy Land as test objects,this paper measured the soil nutrient contents,enzyme activities,and nitrification activity.Among the five 26-year-old plantations,C.microphylia plantation had obviously higher soil organic matter,total N,NH4^＋-N,and NO3^——N contents and the highest soil urease,protease,and nitrification activities,and S.gordeivii plantation had the highest soil nitrate reductase activity.The soil urease and protease activities were significantly positively correlated with soil organic matter content.With the increasing age of C.microphylla plantation,the contents of soil organic matter,total N,NH4^＋-N,and NO3^——N, the activities of test soil enzymes,and the soil nitrification activity increased,and the soil urease and protease activities had significant positive correlations with the plantation age.
出处
《生态学杂志》
CAS
CSCD
北大核心
2011年第7期1461-1466,共6页
Chinese Journal of Ecology
基金
国家自然科学基金项目(40871247)
国家公益性行业科研专项经费项目(201004023)
中央高校基本科研业务费项目(N090405010)资助
关键词
固沙群落
硝化活性
土壤养分
酶活性
科尔沁沙地
sand-fixing plant community
nitrification activity
soil nutrient
enzyme activity
Horqin Sandy Land
