关键词: 控制性根系分区交替灌溉, 水分亏缺, 玉米

Abstract: The effects of soil microorganisms and biodiversity were investigated in a pot experiment of maize, with the treatment of watering conventionally whole root zone, the treatment of only watering fixed half part of root zone and the treatment of watering alternatively the two half parts of total root zone. Results showed that the condition of soil water content and ventilation were ameliorated in the treatment of low-grade deficit irrigation by the same irrigation way. It's benefit of the multiplying of soil microorganism. Because of the root zone in the treatment of alternative irrigation be kept in alternately dry and moist, at the time of providing the humidity that the life activity need, make soil intermittent to be kept in nicer ventilate condition, provided the beneficial existence condition for the soil microorganism, the obviously superiority of alternative irrigation was displayed in different irrigation ways.

Key words: Controlled root-divided alternative irrigation, water deficit, maize