Abstract: This experiment was performed at the teaching farm of Inner Mongolia College of Agriculture and Animal Husbandry (in the south of Damao Banner) from April of 1988 to April of 1939.The flow and distribution of nitrogen among soil-herbage-animal in Stipa breviflora desert steppe ecosystem were studied preliminarily.The result shown as follows:1.In the stipa breviflora desert steppe ecosystem,the nitrogen flux was low,and nitrogen turn over cost a long time.2.The ratio of nitrogen distributed among soil,plant,and sheep—was 90.9—95.7%,1.8—2.5% and25—6.9%,respectively.

摘要： 本试验于1988年4月—1989年4月在内蒙古乌盟达茂旗农牧学院哈雅教学牧场轮牧试验区内进行,对短花针茅荒漠草原生态系统中“土—草—畜”之间的氮流通和分配进行了初步研究,绘出了氮素流程图。研究结果表明:1.在短花针茅荒漠草原生态系统中,氮的流通量较低,氮素周转慢。2.氮素在各组分的分配比例为:土壤,90.9—95.7%;植物,1.8—2.5%;绵羊,2.5—6.9%。