关键词: 农牧交错带, 柠条锦鸡儿, 根系生物量, 土壤含水率, 空间关系

Abstract: This paper choose Caragana korshinskii Kom. plantation as the study object, analyzed the root system distribution characteristics and soil water content in autumn. And quarter circle method was used to sample every layer to study the spatial distribution pattern of root system biomass and soil water content. The results showed that ①The root system was mainly concentrated on the shallow layer（0~60 cm soil layer）; ②the root system biomass spatial distribution was consistent with that of the soil water content, and they were positively correlated. Along with soil layer depth increasing, root system biomass and soil moisture content  gradually decreased; ③root system biomass was significantly related with soil water content both in vertical and horizontal direction. Empirical model of root system biomass and soil water content was established to validate the relationship between them, and the result was good. All results were aiming to provide theoretical basis for Caragana korshinskii Kom management and vegetation restoration in arid area.

Key words: agriculture-pasture transition zone, Caragana korshinskii Kom., root system biomass, soil moisture content, spatial relationship