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一些干旱和半干旱地区,由于蒸腾强烈,地下水上升,使地下水所含有的盐分残留在土壤表层;又由于降雨量小,不能将土壤表层的盐分淋溶排走,致使土壤表层盐分逐年积累,特别是一些易溶盐类,例如NaCl、Na_2CO_3、Na_2SO_4等,结果形成盐渍化土壤。土壤盐分过多时对植物可以产生胁迫作用,即盐胁迫。盐胁迫和其他胁迫(例如水分胁迫、低温胁迫等)一样,对植物都可以产生一定的伤害作用。相反,植物对盐胁迫具有一定
In some arid and semi-arid regions, due to strong transpiration and rising groundwater, salt contained in groundwater remains on the surface of the soil. Due to the small amount of rainfall, salt can not be drained and leached from the surface of the soil, resulting in the accumulation of salt in the soil over the years. Is some of the soluble salts, such as NaCl, Na_2CO_3, Na_2SO_4, etc., resulting in the formation of salinized soil. When soil salinity is too high, plants can have a stress effect, that is, salt stress. Salt stress and other stresses (such as water stress, low temperature stress, etc.), can have some harm to plants. In contrast, plants have some salt stress