Effects of Spring Wheat and Broad Bean Intercropping System on Soil Water Potential

The pot experiment of wheat/broad bean intercropping was conducted to investigate the difference between wheat and broad bean and intercropping and monocropping in soil water potential.The results showed that soil water potential of wheat decreases faster than that of broad bean in most wheat growth stages,except for wheat seedling stage.The fastest decrease of wheat soil water potential occurred in wheat booting stage.The results imply proved that soil water may move from broad bean to wheat,except for wheat seedling stage.The fastest movement of soil water occurred in wheat booting stage.There is strong competition for soil water between wheat and broad bean in intercropping,except for early stage of wheat seedling.