Abstract:

The response of maize growth and yield formation to water stress were investigated by controlling water in rain-proof shelter. The results showed the degree of slow development of maize and yields decrease resulted from the degree level of water stress vary in different stages. Drought stress on plant height inhibitory effect shows：the jointing Booting stage >the tasselling silking stage> the seedling stage. Drought stress while the control during seedling. The treated plants were rewatered, which the plant height get compensation growth. Affected by water stress ear weight, grain weight and amount of grain were the reduced tendency, which Variation amplitude shows: kernel number > ear weight> grain weight, drought stress in different growth stages reduced production rate shows the tasseling silking stage > the jointing Booting stage > the seedling stage. Water stress in Seedling, jointing booting and tasseling silking stages resulted in degree level of maize yield decreasing to achieve the above 30%, 70% and 90%.