It had been thought that salt and alkali, drought, and chillness were the three most serious abiotic stress factors that could restrict the growth, development and yield of crops for a long time.

长期以来，盐碱、干旱、寒冷是限制作物生长、发育和产量非常严重的三大非生物胁迫因素。

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The different results in C. virgata indicated that alkali stress with greater destructive effects, different from salt stress, is an important abiotic stress, and worthy of further study.

在盐碱两种短期胁迫下，虎尾草幼苗不同的光合、荧光响应及其它指标的变化表明，碱胁迫是一种不同于盐胁迫的生物胁迫，其对植物具有更大的破坏性和伤害性。

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