CAJ | 학술논문

通过比较西藏锦鸡儿沙堆内与沙堆间的土壤粒径组成特征，并应用统计学方法分析西藏锦鸡儿群落表层土壤粒径空间分布结构特征，及其与土壤水分的关系，为合理利用和保护西藏锦鸡儿资源提供依据。结果表明，沙堆内与沙堆间土壤粒径组成以细沙粒为主，占50％以上，粗沙粒和粗粉粒占9％～18％，且沙堆内与沙堆间石砾、粗沙粒和细沙粒含量差异显著（P＜0．05）。西藏锦鸡儿群落土壤细沙粒的空间异质性最大，空间自相关距离最小，各土壤粒级的空间自相关距离在0．86～1．85 m 。土壤水分与细沙粒呈显著正相关关系，与石砾和粗沙粒呈显著负相关关系。
통과비교서장금계인사퇴내여사퇴간적토양립경조성특정，병응용통계학방법분석서장금계인군락표층토양립경공간분포결구특정，급기여토양수분적관계，위합리이용화보호서장금계인자원제공의거。결과표명，사퇴내여사퇴간토양립경조성이세사립위주，점50％이상，조사립화조분립점9％～18％，차사퇴내여사퇴간석력、조사립화세사립함량차이현저（P＜0．05）。서장금계인군락토양세사립적공간이질성최대，공간자상관거리최소，각토양립급적공간자상관거리재0．86～1．85 m 。토양수분여세사립정현저정상관관계，여석력화조사립정현저부상관관계。
Cragana tTibetica community mainly distributes in Tibetan and Mongolia Plateau ,and plays important roles in the researches for plant evolution ,flora ,and vegetation succession .C .tibetica is a xe-rophytic cushion shrub ,and generally formed uniform and striking nabkhas in the habitat with surface cov -ered by sand .This study compared the soil particle composition between inside and outside of the C .tibet-ica nabkhas ,and analyzed the spatial distribution characteristic of soil particle and its relationship with soil water content in the community by using the method of geosatistics .The results showed that the composi-tion of soil particles inside and outside nebkhas was mainly find sand ,which accounted for more than 50%of the soil .The proportion of coarse sand and silt ranged from 9% to 18% ,and the significant differences were found for grave ,coarse sand and fine sand between inside and outside nabkhas .In C .tibetica com-munity ,the fine sand of the soil showed the largest spatial heterogeneity and smallest distance of spatial autocorrelation ,and the spatial autocorrelation distances of soil particles ranged from 0 .86 to 1 .85 m .In addition ,soil water content showed significant positive relationship with fine sand content of the soil but negative one with grave and coarse sand content .The findings can provide reference for rational utilization and protection of C .tibetica .