Effects of drip irrigation mode on spatial distribution of soil water and nitrogen and winter wheat yield

Study on best drip irrigation mode applied in field plants plays an important role in the promotion process of drip irrigation technology. Field experiments which choose two drip irrigation types and four different irrigation schedules were carried out to assess the effects of drip irrigation mode on spatial distribution of soil water, soil nitrogen and winter wheat yield. The results showed that drip irrigation mode had little effect on irrigation quantum and irrigation frequency in the period of winter wheat growth on the basis of the same soil water controlling range. And based on the same fertilizing amount and irrigation quota, subsurface drip irrigation impeled nitrogen to deep soil obviously compared with drip irrigation. The nitrate nitrogen transport had similar rules with different drip irrigation types but same irrigation schedules, and the irrigation schedule had obvious effect on winter wheat yield when adopted same drip irrigation types but different drip irrigation schedules. The drip irrigation mode exerted little effect on winter wheat yield under sufficient irrigation and had obvious effect on winter wheat yield under deficit irrigation.