半荒漠风沙区人工柠条群落生物量动态及经济性状分析

根据柠条生长发育过程中的两个不同阶段,探讨了不同龄级柠条人工群落生物量的季节性动态,建立了生物量动态模型.调查和试验分析结果表明,柠条群落是毛乌素沙地西南部半荒漠风沙区较稳定的人工固沙植物群落.确定平茬萌芽更新是柠条群落更新的主要途径,可提高地上部分生物量,平茬最佳年龄为4 a生.采用半定位方法测定了柠条丛生物量(鲜重)可食与不可食部分之比及生物量的干鲜比及其营养成分.

An Analysis on the Community Biomass Dynamics and Economic Characters of Artificial Caragana intermedia Community in Semi-desert Area

Based on two different growth periods, this paper discussed the seasonal trends about the artificial community biomass of Caragana intermedia with different age, established the model of biomass dynamics. The analytical results of investigation and experiments showed that Caragana intermedia was a more stable artificial sand-fixation plant community at the southwest part of Maowusu desert area. Sprouting was determined to be the main method of community renewing, may improve the biomass of the part on the ground, the best age of renew cutting is 4a. By the means of semi-stability, the ratios of edible part and non-edible part, dry and fresh parts of its biomass were tested, the nutrient components were given.