毛乌素沙地臭柏、油蒿细根生产动态及影响因子

The Fine Roots' Production Dynamic and Influence Factors of Sabina vulgaris and Artemisia ordosica in Mu Us Sandland

在毛乌素沙地开发整治研究中心北试实验地选取了七块样地,并依据建群植被外貌特征划分为臭柏群落、臭柏灌丛、油蒿群落三类。用根钻对各样地一个生长季内的根系进行了五次取样,同时测量土壤水分、枝条生长长度、温湿度等一些气象因子。对活细根分级并称干重,发现臭柏、油蒿不同径级细根的季节动态不同,不同土层内相同径级的细根生产动态也不相同:①臭柏与油蒿D≤2 mm的细根生物量在4~5月份都有一个快速增长的阶段,随后增长格局各不相同。②臭柏灌丛中,1

7sampling sites on the north of Developing and Managing Research Center in Mu Us Sandland were chosen.The sites were classified into three types which named as Sabina vulgariscommunity,Sabina vulgariscluster and the Artemisia ordosicacommunity according to the physiognomy of constructive species'.Soil coring method was used to obtain the roots randomly,sampling five times in a growth seasonl,and the soil water content,branch growing length and some climate factors were measured at the same time.The living f...