白茎盐生草在西北盐碱地区生物治理中的作用

ROLE OF HALOGETON ARACHNOIDEUS IN BIOLOGICAL RESTORATION OF SALINE AND ALKALINE LAND IN NORTHWEST CHINA

白茎盐生草,是广泛分布于西北内陆荒漠或半荒漠地区的一种耐盐植物,植株粗灰分含量高达36.48%。可在土壤全盐含量0.5%～1.0%的盐碱地或遭受人为破坏的盐碱荒漠上旺盛生长,盖度大,生物量高,植株体内积聚大量盐分,烧灰制成生物碱可作为食品添加剂进行利用,是被人们利用最早的盐生植物。白茎盐生草的聚盐特性在盐碱地治理和防治次生盐渍化方面有重要作用,通过种植白茎盐生草,植株对盐碱的吸收和外携,达到拔盐抽碱的治理目的,植株处理所获得的盐分制成生物碱加以利用,是盐碱地治理的重要生物措施之一。

Halogeton arachnoideus was a kind of halophyte which was widely distributed in the desert and semi-desert region of northwest china,and whose crude ash content was up to 36.48%.It could grow exuberantly in saline soil that the total salt content was 0.5% to 1.0% or degraded salinity-alkalinity desert with high coverage and biomass,and accumulated large quantities of salt,furthermore,the alkaloids ash which was made by its burn body could be used as food additives.It was the earliest saline plant that was being applied.The salt accumulation characteristics of Halogeton arachnoideus played a critical role in the saline-alkali control of secondary salinization through absorbing the saline and alkaline and utilizing the alkaloids.So,it was an important biological measure to restore the saline and alkaline land.