【摘要】 针对科尔沁沙地优良固沙灌丛柠条锦鸡儿（Caragana korshinskii）群落，探讨未平茬（CK）、留茬0 cm（L-0）、留茬50 cm（L-50）、留茬100 cm（L-100）对灌木、草本及土壤养分的影响。结果表明：L-50留茬基部萌生的新枝生物量显著高于其他处理；L-0灌丛基部萌生的新枝数量、比叶面积和叶生物量占比均显著高于其他处理。L-0灌丛间的植被盖度、生物量和Shannon-Weiner指数分别为30.2%、217.0 g·m^-2和25.5,显著高于其他处理；灌丛下草本植被数量、生物量和生物多样性指数则是L-50处理最高。相同平茬处理灌丛下的土壤TN和TC高于灌丛间，且以L-0处理为最高。平茬处理对灌木植株复壮和草本植被恢复作用明显，但L-0处理更有利于灌木新生枝条上的叶和灌丛间草本植被生长，而L-50处理则更利于灌丛新生枝条自身和灌丛下草本植被生长。更多还原

【Abstract】 Aiming at fine sand-fixing shrubs Caragana korshinskii community in Horqin Sandy Land, this paper mainly discussed the effect of non-stump（CK）,stump height 0 cm（L-0）,stump height 50 cm（L-50）,and stump height 100 cm（L-100） on the shrubs, herbs and soil nutrients. The results showed that L-50 treatment could increase the biomass of new sprouting shoots from stump positions and shrub roots significantly, but L-0 treatment definitely increased the new sprouting shoots number, specific leaf area（SLA） and the proportion of leaves biomass in new shoots. Under L-0 treatment, vegetation coverage, biomass and Shannon-Weiner index were 30.2%,217.0 g·m^-2 and 25.5 respectively, which was significantly higher than other treatments. Under shrubs canopies, plant abundance, biomass and species diversity index all showed the highest values of L-50 treatment. With the same stump treatment, soil total TN and TC in shrub canopies were higher than that among shrubs, and L-0 treatment was the highest. The conclusion was that stump measure showed very obvious improvement in shrubs recovery and herbaceous vegetation restoration. While stump L-0 treatment was more favor of leaves growth from new sprouting shoots and herbs restoration among shrubs, stump L-50 treatment was more conductive to the growth of new sprouting shoots and herbs restoration under shrub canopies.更多还原