羊草（Aneurolepidium　chinense）和虎尾草（Chloris　virgata）体内Na￣＋积累动态的数学分析

Mathematical Analysis of Na￣+ Accumulation in Aneurolepidium chinense and Chloris virgata

本文对羊草、虎尾草体内Ｎａ￣＋积累和分布的规律，用数学方法进行了分析，结果表明：羊草对Ｎａ￣＋有很强的适应性，Ｎａ￣＋在其体内可不断积累，仅呈现出微弱的抵御Ｎａ￣＋入侵的机理。虎尾草随着Ｎａ￣＋不断地进入体内，呈现出较强地遏制Ｎａ￣＋入侵的机理，使进入体内的Ｎａ￣＋数量能够得到控制。羊草和虎尾草都是耐盐碱植物。

The pattern of accumulation and distribution of Na￣+ in Aneurolepidium chinense and Choloris virgata were studied and analysed with mathematical methods.The results showed that Aneurolepidium chinense could beable to grow in the soil containing high content of Na+.The element was gradually accumulated in theplants and the plants only has weak resistance to the intrusion of Na+.Chloris virgata has strong defensivefunction to Na+ intrusion.The function increased as Na+ content increased in the plants so that the Na+inplants was kept at a certain level.However,both Aneurolepidium chinense and Chloris virgata are salt tolerantspecies.