| Winter wheat in bed-planting in rain-fed areas with severe drought was seriously stressed by soil water decreasing as crop growth and development.An experiment was carried out to study the effects of bed-planting and mulching system,bed-planting system,flatting culture practice and and flatting culture with mulching on the yield of winter wheat.The results showed that,compared with the control,the yield decreased by 7%～10%,mainly because of total population,LAI,and dry matter accumulation decreasing by 7.1%～14.6%,8.1%～16.3% and 0.4%～27.3%,respectively.Moreover,dry matter contribution was unreasonable,and the potential of edge effects for yield increase was rather limited under the case,causing a yield decrease by 7%～10%.So,whether the technology of bed-planting applying in rain-fed areas is successful or not mainly depends on the special condition of the annual rainfall,and the bed-planting is not suitable for severely dry areas. |