一、唐菖蒲对土壤的要求唐菖蒲应种植在通气透水性良好的砂壤土中,若种植地的土壤比较粘重,可在种植前掺入有机肥、秸杆或沙子进行改良后再种植。唐菖蒲要求土壤pH值在6～7之间,土壤pH值低于5会引起氟毒害。土壤pH值高于7.5则会引起缺素症。唐菖蒲最常见的缺素症是缺铁,一般在种植前往土壤中施加螯合铁溶液进行预防。此外,唐菖蒲对盐分很敏感,土壤的EC值应小于2ms/cm,土壤中氯的含量必须低于50mg/L,温室灌溉水中氯的含量不能高于200mg/L,否则,盐分过高,特别是氯的含量过高往往会阻碍植株根系生长,从而影响开花。因此有条件可在种植前6周对土壤的营养条件、盐分含量以及酸碱度进行测定,以便有针对性采取改良措施。二、种植前的准备1.土壤消毒:如果土壤的前茬种过唐菖蒲、鸢尾、小苍兰或其他鸢尾科植物,则在种植前必须将土壤彻底消毒,否则可能会造成土传病害的发生。 Gladiolus requirements for soil Gladiolus should be planted in good aerated permeability of sandy loam soil, if the soil is relatively sticky, can be incorporated before planting organic fertilizer, straw or sand for improvement after planting. Gladiolus requires soil pH between 6 and 7, soil pH value below 5 will cause fluoride poisoning. Soil pH above 7.5 causes deficiency. Gladiolus is the most common deficiency deficiency iron deficiency, usually in the soil before planting to impose chelated iron solution for prevention. In addition, gladiolus is very sensitive to salt, soil EC value should be less than 2ms / cm, the soil chlorine content must be less than 50mg / L, greenhouse irrigation water chlorine content can not be higher than 200mg / L, otherwise, the salt is too high, In particular, high levels of chlorine often impede plant root growth, thus affecting flowering. Therefore, conditions can be 6 weeks before planting of soil nutrient conditions, salt content and pH were measured in order to take targeted improvements. Second, the preparation before planting 1. Soil disinfection: If the soil before the crop planted gladiolus, iris, freesia or other iris plants, the soil must be thoroughly disinfected before planting, or it may cause soil-borne diseases occur.