Abstract:Taking super rice as test material, the randomized block design method and barrel experiment were conducted to investigate the effects of four treatments with migration of total phosphorus (TP) in underground drainage and soil leakage loss risks and movement of phosphorus and rice yield. Four treatments were:frequent shallow irrigation (FSI), controlled irrigation (CI) wetshallow irrigation (WSI) and drought planting with straw mulching (DPS). The results showed that compared with FSI and WSI, CI and DPS could significantly reduce irrigation amount and irrigation frequency, the concentration of TP in underground drainage and underground drainage, and effectively promote water saving and emission reduction. Under different irrigation and drainage modes, there were many fluctuations in the whole growth period, and the maximum concentration of TP in underground drainage was 0.450mg/L. The TP concentration in soil seepage at different depths was different in different irrigation and drainage modes. Except for the late tillering period, the TP concentration was the highest on the surface and decreased with the increase of soil profile depth. The TP concentration of soil seepage in WSI and DPS was higher than that in FSI and CI. Compared with the FSI, the yield of CI was increased by 10.45% and the DPS was decreased by 14.69%. The productivity of irrigation water in two years of CI and DPS was significantly higher than that of WSI and FSI. Comprehensively considering the irrigation and drainage, irrigation frequency and phosphorus loss, yield and irrigation water productivity, CI was the best mode for water saving, labor saving, emission reduction and high yield.