两种猪毛菜地上和地下部分的生长动态

对紫翅猪毛菜（Salsola affinis）和散枝猪毛菜（Salsola brachiata）地上、地下生物量及株高和根长的动态变化进行研究。结果表明：两种猪毛菜植株高度生长变化趋势随时间变化呈“先慢后快”的模式，根长的生长变化趋势则呈“先快后慢”的模式，地上、地下生物量的积累动态是与年节律的进程相吻合的。两种猪毛菜表现出来的地上、地下生长策略不仅保证了该物种在荒漠环境中的顺利繁衍，同时对其在防风固沙、维持生态环境的稳定及荒漠绿化方面有重要的意义。

Growth Dynamic of Salsola affinis and Salsola brachiataof Abovegroud and Underground

Salsola affinis and Salsola brachiata are desert annuals inhabiting the Junggar Basin of Xinjiang. To better understand how they adapt to their desert habitat,their growth dynamic of abovegroud and undergroud biomass,root depth and plant height have been studied. The results indicated that the root height and length of Salsola a f finis and Salsola brachiata changed along with time change,namely, firstly it grew slowly,then fast. The root vertical length firstly grew fast,then slowly. The biomass accumulation dynamic of aboveground and underground tallied with the annual rhythms. These strategies ensure the successful colonization of the species in desert, and are very important in protection against wind and sandfixation, sustaining and restoring the local ecosystem, and greening desert.