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北沙柳是重要的固沙与能源植物。以北沙柳优良单株及品种选择为目标,对毛乌素沙地乌审旗图克镇境内42个北沙柳单株间的千粒重和种子活力进行了差异性分析。结果表明:北沙柳种子平均活力指数为37.53,变异系数26.00%;千粒重为0.0791g,变异系数19.16%。不同单株间的种子活力指数及千粒重差异极显著(P<0.01);种子活力指数呈现出随着千粒重增加而增加的趋势,50%的低活力个体其种子千粒重也低,具有选择潜力。
North Salix is an important sand-fixation and energy plant. With the goal of selecting excellent single plants and varieties of Salix psammophila, the differences of 1000-grain weight and seed vigor among 42 single asarus species in Tushike town of Wushen County in the Mu Us sandy land were analyzed. The results showed that the average vigor index of Salix psammophila was 37.53 and the variation coefficient was 26.00%. The grain weight was 0.0791g and the variation coefficient was 19.16%. The seed vigor index and 1000-grain weight were significantly different among different plants (P <0.01). The seed vigor index showed an increasing trend with 1000-grain weight increasing, and 50% of low-activity individuals had low seed weight and seed selection potential.