Effects of fertilizer treatments on ecological environment and yield of zizania-rice rotation system

Zizania-rice rotation system was established and treated by 3 fertilizing methods,and the effects of fertilizer treatments on ecological environment and crop yield of zizania-rice rotation system were investigated.Results showed that the organic fertilizer was beneficial to zizania-rice rotation system system both in ecological environment and soil fertility.Soil in that cropping system had the lowest bulk density(1.15 g/cm3) and highest total porosity(54.92%),its water storage was 27.36 mm.The organic matter and total nitrogen in 0-10 cm layer of soil was 46.02 and 1.82 g/kg,in 10-20 cm layer was 45.05 and 1.21 g/kg.The system also had the highest zizania yield of 74 800 kg/hm2.There was no significant difference on rice yield among the cropping system treated by different fertilizing methods.