Study on the ecological effect in wheat field of different planting patterns

The ecological effects in wheat field of different planting patterns were studied.The results show that the soil bulk density of bed-planting is lowed significantly,and soil porosity is improved correspondingly.As far as soil respiration intensity,20～40cm of bed-planting is the highest,then 20～40cm of conventional flat planting,and 0～20cm of both,the lowest.The irrigation water amount received in deep soil layer in bed-planting is more than that in conventional flat planting,and the water use efficiencies in bed-planting are 1.62kg/m³ and 1.56kg/m³ and are improved by 21.8% and 16.4% respectively,higher than those in conventional flat planting of two cultivars.The air humidity inside wheat plant in bed-planting is lowed by 3.5%～15.5% than that in conventional flat planting and the solar energy use efficiency of grain and dry matter yield are increased by 10.0%～13.2％ and 10.3%～10.8% respectively,the colony transparent rate of bed-planting is higher than that of conventional flat planting in the same cultivar but in different planting patterns.