Effect of phosphorus supplying level on soil in root growth and yield on wheat/maize intercropping populations

An experiment was carried out in difference phosphorus levels by root to study the yield and root morphology between intercropping and monoculture in spring wheat and maize.The results showed that appropriate phosphorus can increase wheat and maize yield,but more phosphorus can decrease. The phosphorus was divided into three levels,that was 0.1 g/kg(P1),0.2 g/kg(P2) and 0.3 g/kg(P3).Compared with P1 level,the total yield was increased by 55.09% and 40.17% in P2 level and P3 level,the grain yield were increased by 51.28% and 56.27%,the biomass of monowheat increased by 35.89% and 40.17%,and the weight of perear increased 21.71%～65.79%.Copared with low phosphorus,the weight of root was increased,while too higher phosphorus caused decrease.The length of root in monoculture wheat and intercropping maize were increased with the phosphorus levels increase.Compared to low phosphorus(P1),the length of root was increased by 11.78%～31.16% in monoculture wheat,and the length of root was increased by 39.83%～53.76% in intercropping maize,but the length of root in mono-maize was increased at first while decreased later with the phosphorus increase.